At a glance

SRAM NX Eagle 12-speed groupset
Rockshox Recon Silver RL fork
Sonder ...

Frontier NX Eagle

Photos for illustration purposes. Please check the bike spec for detailed component listings.

Buy Now

Frontier NX Eagle

Name: Frontier NX Eagle
Brand: Sonder
Price: 1349.0 GBP
Availability: InStock
Rating: 5.00 (12 reviews)

Multi-activity trail bike

£1,349

Quick, lightweight modern mountain bike with SRAM NX Eagle 1x12 groupset and Rockshox Recon Silver RL fork.

Need help choosing a bike or technical advice?

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Pop into a store 7 days a week
Call a Sonder Customer Hero on 01773 417006
Email us at support@alpkit.com

Buy Now. Be Riding in 5 days.

Quick, lightweight modern mountain bike with SRAM NX Eagle 1x12 groupset and Rockshox Recon Silver RL fork.

Buy Now. Be Riding in 5 days.

Please select
size

Size
- Small
  Email when available
- Medium
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- Large
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- X-Large
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colour

Colour
- Black
  Email when available
- Crayon
  Email when available
- Forest
  Email when available

Every Sonder bike is built to order so tell us exactly how you want it. Make any changes you want from the standard build and when you’re done, just hit “Add to bag” at the bottom of the page.

Handlebar

Sonder Aspect Riser 780mm
Sonder Aspect Riser [OEM]
In general riser bars tend to be wider than flat bars and may have slightly more flex to give a more forgiving ride. As you go into descents and your arms drop below your knees the additional height gained on your front end will help you take control of the steep descents.

That said you can get all bar types in a range of widths and stiffnesses and front end height can be adjusted with spacers like our Sonder Rings, so sometimes you just have to ignore the mumbojumbo and make your call on style and personal preference and there is nothing wrong with that.
Sonder Horizon Flat 720mm
+£0
Sonder Horizon Flat [OEM]
Flat bars help you keep the front end of your bike low, allowing you to get the weight over your front wheel when climbing and giving you more control in cornering.

Our flats have a 5˚ rise so technically we should call them flatish, but if you really need them to be totally flat just rotate in the stem clamp!
Sonder Confucius
+£24.99
Sonder Confucius
Confucius says that you don't have to sacrifice what you love about your traditional riser bars just to get the flexibility of a hooped bar.

We have taken our Aspect risers and evolved them in to a bar designed primarily for bikepacking. You won't have to adapt to a new hand position so you are not going to lose any control off-road and you can still get out of your saddle and power up the hills like a hero.

If you do want to move your hands a bit a reduce the fatigue of a long ride, the hoop extends out front giving a choice of further hand positions. The bars also have a slight 'back sweep' so you can sit more upright in the saddle

The bars have a slight riser but feel free to experiment and rotate them to your suiting. Keep them horizontal, or twist them up slightly to give yourself a streamlined TT style riding position to help you battle across a windblown Tierra del Fuego.

Strength is not compromised as the main load bearing section of the bar is a single piece. Got gadgets? Confucius loves gadgets, and with the out-front hoop you can free up the bar around the stem. Simply attach your Garmin, 3000 lumen torches or mascots to the hoop and they will still be well within reach, maybe at an even better viewing angle and sit above your handle bar luggage.

Take your bikepacking into the mountains; Confucius is a bar that gives you more control than a tradional swept back bar on technical terrain.

Saddle

Sonder Abode Black / 138
Sonder Abode [OEM]
High density foam padding over a plastic base provides comfort and longevity. A v-shaped split at the rear of the saddle allows flex as you are riding, increasing shock absorbancy and reducing pressure on the spot between your sit bones.

Scooped up at the back with a slight rise towards the nose the longitudinal profile provides a cupped, craddled seating position, a timeless, proven design for distance on and off the road or climbing in the mountains.

Stainless steel rails give 50 mm of forward and back adjustment to help you find your sweet spot.

All our Sonder bikes come with Abode fitted as standard.
Sonder Abode Black / 158
Sonder Abode [OEM]
High density foam padding over a plastic base provides comfort and longevity. A v-shaped split at the rear of the saddle allows flex as you are riding, increasing shock absorbancy and reducing pressure on the spot between your sit bones.

Scooped up at the back with a slight rise towards the nose the longitudinal profile provides a cupped, craddled seating position, a timeless, proven design for distance on and off the road or climbing in the mountains.

Stainless steel rails give 50 mm of forward and back adjustment to help you find your sweet spot.

All our Sonder bikes come with Abode fitted as standard.
Sonder Zone 133 / Black
+£29.99
Sonder Zone [OEM]
The Zone is designed for maximum pedalling efficiency and comfort on longer rides, whether on road or off it.

Chromoly rails with suspension system

Cut-out shape relieves pressure

High density foam seat for comfort

We’ve selected a flat saddle profile that’s long enough to allow for lots of micro-adjustments to your riding position over the course of a full day on the bike. The nose width allows you to move forward over the pedals on climbs and sprints, and a tapered back enables you to get behind the saddle easily for switchback descents or technical off-road sections.

We’ve chosen a nylon fibre saddle base to provide a stiff and stable pedalling platform for a low overall weight. This base is connected to the chromoly rails using a patented suspension system that reduces road buzz and improves comfort without compromising on support.

High density foam stays comfortable for longer, adding to the saddle’s supportive platform. And a long central cut-out in the middle of the Zone relieves pressure on the perineum, allowing you to ride for longer.
Sonder Zone 152 / Black
+£29.99
Sonder Zone [OEM]
The Zone is designed for maximum pedalling efficiency and comfort on longer rides, whether on road or off it.

Chromoly rails with suspension system

Cut-out shape relieves pressure

High density foam seat for comfort

We’ve selected a flat saddle profile that’s long enough to allow for lots of micro-adjustments to your riding position over the course of a full day on the bike. The nose width allows you to move forward over the pedals on climbs and sprints, and a tapered back enables you to get behind the saddle easily for switchback descents or technical off-road sections.

We’ve chosen a nylon fibre saddle base to provide a stiff and stable pedalling platform for a low overall weight. This base is connected to the chromoly rails using a patented suspension system that reduces road buzz and improves comfort without compromising on support.

High density foam stays comfortable for longer, adding to the saddle’s supportive platform. And a long central cut-out in the middle of the Zone relieves pressure on the perineum, allowing you to ride for longer.
Sonder Kura
+£34.99
Sonder Kura [OEM]
Adventure cycling is diverse; in the course of a single trip you can find km's of asphalt, traverse rutted grasslands, weave through thickly forest singletrack, climb loose gravel track or descend steep rocky trails.

It is unlikely you are going to find a single saddle position for all of this terrain. With this in mind Kura has a flat longitudinal profile with a gentle lateral curvature to give an extended saddle area, allowing you to position yourself around the saddle as you move between road, downhill, and climbing.

The honeycomb base reduces weight whilst still providing structure and support that adapts and flexes with your motion.

Titanium rails giving 50 mm of forward and back adjustment to help you find your sweet spot. Titanium is more forgiving than steel so provides a little more comfort.

Slightly wider than our Adobe saddle, it may provide additional comfort for riders with wider sit bones.
Brooks Cambium C17 Saddle / All Weather / Black
+£94.99
Brooks Cambium C17 Saddle [OEM] / All Weather / Black
Brooks B17 Saddle Standard / Black
+£109.99
Brooks B17 Saddle
Manufactured in the UK, a tough 5mm thick leather top is stretched from a thin metal cantle plate at the rear, over the rails to the nose piece and secured by rivets. This durable leather top eventually wears to the shape of the user’s ‘sit bones’ for a superior riding experience. With the right leather-care a Brooks saddle can easily last a lifetime of riding.

It may seem counterintuitive, but firm and less cushioned saddles are proven to reduce friction while cycling which protects against chafing and rubbing. Should the hammock-like design of the saddle start to sag too much, the leather can be re-tensioned by tightening a bolt in the nose piece.

Seatpost

Sonder Seatpost / 31.6mm / 400mm
Sonder Seatpost [OEM] /
A seat post that is reliable and offers adjustability to help you find your ultimate riding position.

Membar is all about adjustability. With a twist of your allen key the micro adjustment rail clamp allows the saddle angle to be fine tuned to your ideal position.

Your saddle can be fitted with minimal faff thanks to a quick release action that allows the upper rail clamp to be released without removing the retaining bolt. The lower rail clamp is secured to the seat post which means that it will not fall in the mud when you are trying to fit your saddle.

Stem

Sonder Piskie / 31.8mm / 31.8mm / 35mm
Sonder Piskie [OEM] / 31.8mm /
Sonder Piskie / 31.8mm / 31.8mm / 45mm
Sonder Piskie [OEM] / 31.8mm /
Sonder Piskie / 31.8mm / 31.8mm / 55mm
Sonder Piskie [OEM] / 31.8mm /
Sonder Talo 35
+£34.99
Sonder Talo
Talo is a sturdy CNC machined aluminium performance mountain bike stem with four bolt clamp to hold your bar firmly in place.

Opposing bolts on the steer tube clamp give extreme clamping power while reducing stress on the steer tube. Machining shaves unnecessary weight to specifically engineer it for trail and all-mountain riding.

It's built for the trail and stiff for its weight to give precise and immediate handling.

compatible with all 31.8mm handlebars and 28.6mm steerer tubes

0° rise

6061-T6 aluminium construction

Weighs just 127g (35mm length)

Available in 35mm and 45 mm lengths

The humble stem has a significant effect on your bike's geometry and as a result its performance and your comfort. A shorter stem results in faster handling and a more upright riding position. Longer stems increase reach with slower more predictable handling.

Experiment with different length stems or get a pro bike fit to hone your perfect set-up.

Note. The length of a stem isn’t its overall length, from the very front to the very back, but the distance from the central point on the steerer tube and the centre of the handlebar.

Sonder Talo 45mm
+£34.99
Sonder Talo
Talo is a sturdy CNC machined aluminium performance mountain bike stem with four bolt clamp to hold your bar firmly in place.

Opposing bolts on the steer tube clamp give extreme clamping power while reducing stress on the steer tube. Machining shaves unnecessary weight to specifically engineer it for trail and all-mountain riding.

It's built for the trail and stiff for its weight to give precise and immediate handling.

compatible with all 31.8mm handlebars and 28.6mm steerer tubes

0° rise

6061-T6 aluminium construction

Weighs just 127g (35mm length)

Available in 35mm and 45 mm lengths

The humble stem has a significant effect on your bike's geometry and as a result its performance and your comfort. A shorter stem results in faster handling and a more upright riding position. Longer stems increase reach with slower more predictable handling.

Experiment with different length stems or get a pro bike fit to hone your perfect set-up.

Note. The length of a stem isn’t its overall length, from the very front to the very back, but the distance from the central point on the steerer tube and the centre of the handlebar.
Forks

Rockshox Recon RL Silver 100mm / 29
Rockshox Recon RL Silver
Rockshox Reba RL / 100mm / 29
+£149.99
Rockshox Reba RL / 100mm / 29
Treat your bike to one of the most successful and capable RockShox forks of all times. The Reba uses some of the features and innovations from the latest SID. This fork combines classic XC performance with excellent tracking and a Motion Control™ damper to keep things under control when it gets a bit wild.
Rockshox Sid Ultimate / 29 / 100mm
+£424.99
Rockshox Sid Ultimate / 29 / 100mm
Tubes

WTB Inner Tube / 27.5 / 2.8-3.0
WTB [OEM] Inner Tube / 27.5 / 2.8-3.0
Tubeless Tyre Upgrade and Setup
+£44.99
Tubeless Tyre Upgrade and Setup
Go tubeless

Wheels

Sonder Nova 27.5+ Wheelset Shimano
Sonder Nova 27.5+ [OEM] Wheelset
Whether you're navigating rock gardens or tackling steep climbs, Novas will consistently give you a boost when the roads are rough and the terrain is tricky. Machine built for precision on Sonder’s sealed hubs.

Our design team’s expertise along with the factories we use mean that we can accelerate trickle-down technology to this price point.

Boost: wider, stiffer, tougher

Nova's boost hub is wider than a standard hub; extra width between the flanges promotes a shallower spoke bracing angle to create a stronger, stiffer wheel. A wider hub also means a shorter chainstay, more mud clearance, and better tyre clearance.

Wider rims mean tyres work better

38mm lightweight aluminium rims make this wheelset ideal for rock gardens and technical terrain – you can run 2.6" - 3" tyres, which will plump up really nicely to give a broad contact patch for maximum traction and confidence.

Built to take abuse

Novas have sealed bearings that are easily serviceable without the need for specialist tools. Plain-gauge spokes have been chosen to keep the wheels super-strong, whether you’re landing big drops or loading your bike with luggage. And a steel free-hub body will take years of abuse. You could go round the world on these wheels.
Sonder Nova XC Wheelset Shimano
+£0
Sonder Nova XC [OEM] Wheelset

The Nova 29 XC is our entry level cross-country wheelset, allowing you to run narrower, lighter tyres on longer or less-technical rides.

Tubeless compatible and optimised for 2.0” – 2.4” tyres

6061 alloy rims with plain gauge steel spokes

Sealed bearings for lower maintenance

The Nova 29 XC’s 23m internal width is optimised for 2.0” to 2.4” tyres, accommodating narrower, lighter cross-country designs. Pre-taped they’re fully tubeless compatible for extra weight savings and reduced rolling resistance. The rims are made using light and reliable 6061 alloy with plain gauge steel spokes for extra durability.

The Nova hubs are fully-sealed for low maintenance and are designed around modern Boost spacing standards. The hubs also use a steel body to survive years of abuse.

With a lower weight than wider MTB rims, the Nova 29 XC spin up to speed quicker and require less effort to keep moving. Swap them into existing bikes set-ups for longer rides or upping your speed on faster, less technical singletrack.
Sonder Alpha 27.5 Wheelset / UK Build HG
+£169.99
Sonder Alpha 27.5 [OEM] Wheelset / UK Build
Sonder Alpha 29 XC Wheelset / UK Build HG
+£169.99
Sonder Alpha 29 XC [OEM] Wheelset / UK Build
Lights accessories

No Bike Light Accessories (none)
No Bike Light Accessories
Helmet Mount Black
+£4.99
Helmet Mount
The Helmet Mount allows you to attach your Alpkit bike light to your helmet so you can scan the trail ahead and fly round sharp bends without having to wait for your handlebar light to catch up.

The Velcro straps thread through your helmet vents and a three-pronged pivot with screw tightener allows you to adjust your lighting angle securely. The Helmet Mount is compatible with the Phase 400, Phase 800, Ariel, Hadron.
Cockpit Mount / Black
+£15.99
Cockpit Mount
The Garmin and Light Outfront Handlebar Mount combines two mounts on one arm so your bars aren’t covered in devices.

Sticking out front, the twist lock Garmin mount makes it easier to route find and operate on the move. And you can attach your bike light underneath so your screen isn’t affected by any glare.

The arm positions both your lights and GPS more centrally and is made from durable aluminium. The bracket attaches with screws and comes with an assembly pack so you can fit it securely.

The mount fits the Phase 400, Phase 800, Ariel and Hadron lights.
Bottle cages

No Bottle Cages (none)
No Bottle Cages
Sonder Buzz Wire Single
+£4.99
Sonder Buzz Wire
The easiest and most convenient way to carry water on your bike, a classic cage design that holds your water bottle nice and snug.

Buzz Wire is reassuringly durable, weighs just 65 grams and will carry your 500 or 750 ml water bottle with ease.

If you are on expedition and looking for a way to pass a rest day make a bent wire loop and challenge someone to a game of Buzz Wire!
Sonder Buzz Wire Pair
+£8.99
Sonder Buzz Wire
The easiest and most convenient way to carry water on your bike, a classic cage design that holds your water bottle nice and snug.

Buzz Wire is reassuringly durable, weighs just 65 grams and will carry your 500 or 750 ml water bottle with ease.

If you are on expedition and looking for a way to pass a rest day make a bent wire loop and challenge someone to a game of Buzz Wire!
Sonder Sideblade Black / Left Entry
+£5.99
Sonder Sideblade
The Sideblade bottle cage not only gives your water bottle a lovely, secure hug, but its side loading system makes it easier to access when you need a drink, making staying hydrated a joy even when you've got a load of frame bags to work around!

The Side blade is geared at letting you get to your water when you've got a bike packed up with frame bags, this means that it's also ideal for compact and full-sus frames where a standard loading bottle cage system just won't fit, you can choose which side you'd like to access your bottle by with a twist of the cage in the mount before your ride.

Made of polycarbonate, the Sideblade is also super light and super duper tough - hooray!

Lights

No Lights (none)
No Lights
Tau Rear
+£12.99
Tau
Bright enough to blind you when you turn it on so you can be sure that other road users will also see you.

Tau+ front safety light offers 65 lumens of 270° ultra wide lighting with 10 m beam distance.

Tau- rear safety light will shed out 20 lumens of 270° ultra wide lighting from the red COB LED strip

Tau is visible from up to 100 m and is water resistant so they will happily brighten your way even on the gloomiest of days and is impact resistant from 1 m.

Switch protection prevents any unwanted battery usage and battery capacity indicator will let you know when the juice is running low.

Only 22g including the USB rechargeable battery and LED lights that never need replacing will keep you light and bright for years to come!

Each Tau light comes with a bigger and a smaller strap to fit with most bars/seat posts and if you need it even bigger, just lace the bands together to make a larger loop.
Phase / 400
+£19.99
Phase / 400
The Phase 400 is our lightweight, yet durable, rechargeable bike light for a midweek evening blast on the bike.

5 lighting modes and a 200m beam distance

Versatile: can be attached to handlebar, helmet or cockpit mount

Rechargeable Li-ion battery, with micro-USB cable

Say hello to our sleek, new bike light range: they’re light, durable and rechargeable (and they say hi back). At just 123g, the Phase 400 is the final tool you need to make the most of evening rides. With 400 lumens and >200m beam distance, a Phase bike light will keep you company and confident on your dusk rides.

The Phase 400 has been made with the roadie in mind: whether you’re on a family ride, a mid-week spin or your daily commute to work, you’re going to need an all-round bike light for the incoming dark evenings. But don’t worry if you end up on a canal path or a gravel track, this rechargeable light will suit you just fine for a short jaunt off-road.

Flick between 5 lighting modes: high, mid, low, SOS and strobe. The Phase 400 has a maximum battery life of 8 hours and 20 minutes in low mode, so in the case of a surprise night-time emergency, you’re sorted. The 80-degree beam angle ensures you can see and be seen.

We’ve added in some nifty features, including memory lighting. The light will remember the most recently used mode and default to it the next time you head out on your bike. The Phase 400 is compatible with a handlebar mount (included), a cockpit mount and a helmet mount. It also conveniently charges with a versatile micro-USB cable.
Boson
+£24.99
Boson
A powerful bike light with tough aluminium shell suitable for mountain biking and road biking. Boson is small and compact with a Li-ion rechargeable battery and a Micro USB port.

Boson has 5 lighting modes which are cycled through (excuse the pun) with a single illuminated switch. High power pumps out 850 lumens making even the darkest commute a tunnel of light. Turn it down to medium power and you still have 320 lumens to play with - more than enough for negotiating un-lit cycle ways and paths.

If you want to be seen rather than see where you are going switch out to the 6 or 3 Hz flashing modes. Bright enough to be seen even during daylight hours, it really comes into its own during the hours of twilight and dusk.

A mounting bracket is included (fits 18 - 36 mm bars and no special tools needed). Once attached Boson can be fixed or removed with ease. It allows 360 degree rotation for complete control over your beam of light; the textured lens projects a smooth wide beam ideal for nocturnal riding.

Note: Boson doesn’t take a "standard" 18650 battery - the battery has both anode and cathode at the same end. Do not switch on Boson during charging as it could damage the battery.

Mudguards

No Mudguards (none)
No Mudguards
Sonder Fender Front MTB
+£4.99
Sonder Fender
The Sonder Front Fender protects you from excessive mud splatter on wet, mucky trails. These lightweight plastic mudguards don’t require any special fixings on your bike and can be strapped straight onto your forks with 4 cable ties (supplied).

Made from durable polypropylene, if the Fender does meet its end, it can be easily recycled by most councils or at your local recycling centres.

Pedals

No Pedals (none)
No Pedals
Sonder Torque Black
+£29.99
Sonder Torque
Combining the Comfort of plastic with the grip of metal pedals.

A tough large platform, thin profile thermoplastic body with replaceable steel pins. The Cromoly axle gives durability and strength that you can depend on.

LSL bushing combined with a sealed bearing keeps the pedals turning in all weather conditions.

We have tried and tested these pedals and they have stayed true through winter and summer trails.
Sonder Reko
+£50.99
Sonder Reko
The Reko are lightweight SPD pedals designed gravel riding and cross-country mountain biking over longer distances.

The Reko's platform-free design reduces the overall weight of the pedals to 145g per pedal for lighter, faster riding. Double-sided SPD bindings are easy to clip in and out of and their compact design means they're less likely to clog with muck on filthy winter rides.

The clip-in design improves the efficiency of your pedal strokes, saving energy on long rides and improving power transfer on climbs, and gives you more control of the back end of the bike.
Sonder Jekyll Black
+£59.99
Sonder Jekyll
Jekyll is two faced; SPD's and flats all in one, multi-purpose mtb touring pedals.

Jekyll gives you the freedom to ride with normal shoes or with cleats. Jekyll combines a single sided SPD mechanism with a flat pedal body with grip pins on the other. They are ideal for riders who switch frequently from the daily commute to nipping down to the local shop for a pint of milk in their loafers.

The flat side has 8 replaceable grip pins, 4 mm long, they provide grip in all conditions. When you are ready to get your power on the cleats are just a half rotation away - no swapping your pedals out.

Jekyll also comes provided with Sonder 'SH-51 style' cleats.
Sonder Slingshot Black
+£59.99
Sonder Slingshot
The wide platform Slingshot pedal is designed to provide the support, control and confidence you need for a variety of riding, whether on trail, gravel or road.

Wide 87x90 platform made from 6061 aluminium

Double-sided adjustable SPD clips

Chromoly axle with sealed bearings

The Slingshot's wide foot platform provides plenty of support to the foot for more comfortable pedalling over long distances, reducing hot-spots. This additional foot support also gives you greater control of the rear end of the bike on tight turns or technical trail.

If you're using the Slingshot for mountain biking, the pedal's wide surface gives you a platform to stand on unclipped, ready to bail out if needed, on heart rate-quickening sketchy sections.

With double-sided SPD clips and a large pedal area, the Slingshot is easy to clip in and out of in a hurry. A clipless system provides greater pedalling efficiency when climbing and more control when descending.

Initial Price: £1,349
Extras: £0
Total Price: £1,349

Description
Features
Build Spec
Geometry and Sizing
Frame Spec
Reviews
Kudos

Description

At a glance

SRAM NX Eagle 12-speed groupset
Rockshox Recon Silver RL fork
Sonder Nova 27.5 / 29" XC wheelset
6061 aluminium frame

Frontier is our multi-activity hardtail mountain bike. Ride hard at the trail centre, load it up for a midweek bikepacking trip, pocket your passport and continue around the world. Frontier is an adaptable off-road explorer.

The geometry is for long day comfort but it’s no slouch.

The 6061 aluminium frame provides a durable and stiff chassis giving a responsive kick as you demand power when the slope steepens or enjoy feedback and precision through the corners.

Available as a fully rigid or with 100mm suspension fork. Set it up for XC race speed or for all day big mile comfort.

Tyre clearance gives you the choice of 27.5+ or 29in wheelsets. Bolt through 148mm boost rear spacing provides the benefit of stronger, stiffer and more efficient wheels.

Features

Tuned for all-round capability

Built for a balance of cross country efficiency and trail centre capability. A favourite with bikepackers looking for all-day comfort and performance.

Light and clean

Clean lines thanks to internal cable routing. Frontier also incorporates routing for a dropper seat post. The 6061 aluminium tubing is durable, light, low maintenance and stiff.

Wider tyres. More grip.

Extra width between the chainstays gives you the choice of running 27.5+ tyres up to 3 inches or 29 inch tyres up to 2.5 inches.

Made for stronger wheels

Designed around bolt through Boost 148mm rear spacing providing the benefit of stronger, stiffer and more efficient wheels.

Wilderness trail features

Chainstay mounted disc brakes. And triple bottle mounts.

Build Spec

Frameset
Frame:	Frontier Frame \| 6061 aluminium
Fork:	RockShox Recon Silver RL \| 100mm (travel)
Headset:	FSA Orbit C-40-ACB

Groupset
Shifters:	SRAM NX Eagle Trigger \| 1x \| 12-speed
Brakes:	SRAM Guide T \| Hydraulic \| Post mount
Rotors:	SRAM Centerline \| 180mm (front), 160mm (rear) \| 6-bolt
Rear derailleur:	SRAM NX Eagle \| Long cage \| 12-speed
Chainset:	SRAM NX Eagle DUB \| 170mm \| 32t
Cassette:	SRAM PG1230 \| 11-50t \| 12-speed
Chain:	SRAM NX Eagle \| 12-speed
Bottom bracket:	SRAM DUB \| BSA \| 73mm

Wheelset
Wheels:	Sonder Nova 27.5" or 29 XC
Tyres:	WTB Ranger \| 27.5 x 2.8" \| Black
Tubes:	WTB \| 27.5 x 2.8-3.0"

Finishing kit
Handlebars:	Sonder Aspect Riser \| 780mm
Stem:	Sonder Piskie
Seatpost:	Sonder Seatpost \| 31.6mm
Saddle:	Sonder Abode
Grips:	Sonder Clutch \| Black

Weight
Frame:	XS: TBC S: 1.84kg; M: 1.88kg; L: 1.94kg; XL: 2.08kg;
Build:	XS: TBC S: TBC M: 11.4kg; L: 11.5kg; XL: 11.7kg;

Pedals not included with full builds
Specifications are subject to change without notice

Geometry and Sizing

Sizing

It is important to get the right size bike, if the bike fits you well it will be faster, more comfortable and easier to handle.

Generally we recommend:
Small: Riders between 5ft 2in and 5ft 7in (157-170cm)
Medium: Riders between 5ft 6in and 5ft 10in (167-177cm)
Large: Riders between 5ft 9in and 6ft 2in (175-187cm)
X-Large: Riders of 6ft 2in + (187cm)

Size	Small	Medium	Large	X-Large
ST - Seat tube	380	430	480	520
TT - Top tube	563.1	597.3	621.6	647.3
HT - Head tube	110	115	130	150
HA - Head angle	68	68	68	68
SA - Seat angle	73	73	73	73
CS - Chainstay	445	445	445	445
BB - BB drop	50	50	50	50
FO - Fork offset	51	51	51	51
WB - Wheelbase	1095.7	1131.3	1157	1184.5
SO - Stand over	764	793.9	824.6	852.6
RE - Reach	390	420	440	460
SK - Stack	566.1	580.1	594	612.5

Frame Spec

Weight: S: 1.84kg; M: 1.88kg; L: 1.94kg; XL: 2.08kg
6061 Aluminium frame
Optimised for rigid or 100mm suspension forks
Internal cable routing through downtube
Bolt Through Boost 148mm rear spacing for wheel strength and optimal chainline
Fork built around Bolt Through Boost 110mm spacing
Threaded 73mm BSA BB shell for no-creak assembly
Chainstay mounted disc brake for clean lines and damage protection
Triple bottle cage mount on downtube
Use a seat clamp with integrated mounts for pannier rack compatibility
Clearance for 3 inch 27.5+ or 2.5 inch 29er tyres
Reverb Stealth port
Headset: IS42/28.6 \| IS52/40
EN 14766 compliant

Reviews

Kudos

A First Look at the Sonder Frontier

It is a bike that will likely tick many boxes for anyone planning multi-day rides, without first returning home for their tea.

Read the full review here.

Author: Bearbonesnorm

Active Traveller Review the Sonder Frontier

This cracking value and rock solid machine from Sonder is just crying out to be loaded up and taken to the horizon.

Read the full review here.

Author: Andy McCandlish

Cycling Life Review the Sonder Frontier

Giving several centimeters of squish, their suspension-like characteristics help the Frontier float over rough terrain. With big handlebars, an upright position, and loads of stand-over, the Frontier is great for roistering about on, and could certainly serve as a regular mountain bike.

Read the full review here.

Author: CyclingLife

Frontier - Tried and Tested

The Frontier might be considered a Jack of all trades but the clever bit is, it's able to master most of them.

Read the full review here.

Author: Bearbonesnorm