Santiago Apex1 Flat Bar

Photos for illustration purposes. Please check the bike spec for detailed component listings.
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Santiago Apex1 Flat Bar

Reynolds steel cycle touring road bike


Flat-barred single ring setup for low maintenance riding, geared up for going far with the comfort of a flat bar

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This bike is covered by our 28 Day Ride Guarantee
Customise your bike on the next page.

Buy Now. Deliveries from 9 May.

Build your bike

Select your size and make any changes you want from the standard build. When you’re done, hit Add to Bag at the bottom of the page

  • Frame

    Please select your Size
    Please select your Colour

    Configure your Frame


    • Small

    • Medium

    • Large

    • X-Large


    • Grey

    • Green

  • Configure your

  • 1. components

    Sonder Aspect Riser 780mm
    Love Mud Abode / 138
    Sonder Seatpost 27.2mm / 400mm

    Configure your 1. components


    • 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.


    • Love Mud Abode / 138

    • Love Mud 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 Kura 138 / Black


    • Sonder Kura

      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.

    • Sonder Zone 133 / Black


    • 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 Seatpost 27.2mm / 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.

    • Sonder Ingot 27.2mm Inline


    • Sonder Ingot

      A lightweight titanium seat post is the ultimate accessory to complement your titanium frame or a simply an elegant weight saving upgrade from a standard aluminium post.

      At 240 grams Ingot is a full 76 grams lighter than our aluminium Membar seatpost. Being titanium it benefits from this materials legendary strength and elasticity, smoothing out the long hours in the saddle whilst at the same time reducing the weight, its a win win!

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

      Lightweight, shiny and titanium - what other reasons do you need?!

  • 2. wheels

    WTB Inner Tube 700 / 28-38
    Sonder Nova 700c Wheelset

    Configure your 2. wheels


    • WTB Inner Tube 700 / 28-38

    • WTB [OEM] Inner Tube

      Never one to be stranded roadside; Prudence states that you should always have a spare at hand even for your faithful tubeless set up, and who are we to argue with Prudence.

    • Tubeless Tyre Upgrade and Setup


    • Tubeless Tyre Upgrade and Setup

      Go tubeless


    • Sonder Nova 700c Wheelset

    • Sonder Nova 700c [OEM] Wheelset

      1Sonder Novas are our reliable, versatile disc brake wheelset built for all seasons. Wide-tyred, tough, and versatile, the Nova 700c wheelset is ready for adventure on road and trail.

      19mm wide tubeless-ready rims are perfectly suited for 28 – 50mm tyres, which means more traction through a broader contact patch and lower rolling resistance. Novas are machine built for precision on Sonder’s sealed hubs, which are 12mm thru-axle front and rear.

      We’ve designed the Novas to be a reliable, long-term part of your bike. You could go round the world on them. Plain-gauge spokes mean that the Novas will stay strong when you load your bike up with luggage. Sealed bearings make them easy to look after. And a steel free-hub body will take years of abuse.

      Novas give a beautifully balanced ride, spin up to speed quickly and roll easily on super-smooth bearings. They’re the wheels we choose when we want to keep all our options open – road, gravel, luggage, doesn’t matter!

    • Sonder Alpha 700c HG


    • Sonder Alpha 700c [OEM]

      Sonder Alphas are our performance wheelset. It’s a light, versatile disc brake wheelset built for riding fast in all seasons. And while they’re made for speed, Alphas still easily take wide tyres and are tough enough to load up for multi-day trips on the road and trail.

      20mm wide rims are perfectly suited for 28 – 50mm tyres, which means more traction through a broader contact patch and lower rolling resistance. Alphas are machine built for precision on Sonder’s sealed 6 pawls hubs, which have 120 engagement points in the freehub to give you immediate engagement when you start pedalling (most hubs only have 60, which means you have to turn the pedals further before engaging the freehub). Oh, and the hubs sound amazing!

      Alphas have been designed to be a durable, long-term part of your bike. They’ve been designed with long rides and endurance racing in mind – these would be a perfect choice for the Transcontinental Race. Sealed cartridge bearings make them easy to look after. And an alloy freehub body will take miles and miles of abuse.

      Alphas give a beautifully fluid ride. Light rims mean they spin up to speed quickly while super-smooth bearings keeping you rolling and rolling. They’re the wheels we choose when we want to go far, fast. Road, gravel, loaded for multi-day racing, these wheels fly!

  • 3. pedals

    No Pedals

    Configure your 3. pedals


    • No Pedals (none)

    • No Pedals
    • Sonder Torque Black


    • Sonder Torque

      Pedals: the humble yet essential afterthought that make all that time spent pondering over components worth the pain. Where would we be without them?

      Seriously grippy, reliable, and stable; Torque gives you the confidence to put down the power whatever the weather.

      A light and tough thermoplastic body combined with LSL sealed bearings around a CNC machined Cr-Mo makes Torque the kind of pedal you can depend on to withstand hours of use and abuse.

      Twelve 4 mm replaceable grip pins on each side of the pedal let you customise how much grip you’ll need and boost durability.

    • Sonder Slingshot Black


    • 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.

    • Sonder Reko


    • 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.

    • Shimano RS500SL Pedal Black


    • Shimano RS500SL Pedal
    • Shimano M520 Pedal Black


    • Shimano M520 Pedal
    • Sonder Contact


    • Sonder Contact

      The Contact are lightweight SPD-SL compatible pedals with a large contact area for energy efficient road riding.

      The Contacts have a large, stiff platform, improving power transfer for sprints and climbs and supporting your feet for all-day spinning in comfort.

      The bigger contact area of the SPD-SL system is more energy efficient too, preserving your legs for those deceptively savage inclines at the end of your ride.

      The thermoplastic body and fibre-glass-reinforced binding keep the weight down to 148g per pedal, shaving vital grams from your drive chain.

  • 4. accessories

    Bottle cages
    No Bottle Cages
    No Lights
    No Mudguards
    No Pannier Rack

    Configure your 4. accessories

    Bottle cages

    • No Bottle Cages (none)

    • No Bottle Cages
    • Sonder Buzz Wire Single


    • Sonder Buzz Wire [OEM]

      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


    • Sonder Buzz Wire [OEM]

      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!


    • No Lights (none)

    • No Lights
    • Tau Rear


    • 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


    • 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.

    • Phase / 800


    • Phase / 800

      As the Phase 800 is especially designed for easy-going gravel paths, canals, and short singletrack trails, it is perfectly suited to the gravel rider. The 85-degree beam angle means you can see the journey ahead, as well as be seen by oncoming traffic or the local gravel gang. 

      • >200m beam distance for dusk riding
      • Up to 18 hours of battery life
      • Memory lighting: the light defaults to the most recently used mode upon restarting

      The light boasts 5 modes: high, mid, low, pulse and strobe. In high mode, the Phase 800 lasts 1hr20mins – just enough time for your local mid-week, pre-dinner loop. On the other end of the scale, the 100-lumen pulse mode lasts over 18 hours! No matter your journey, Phase 800 can adapt to your trail.

      It’s got good memory too: the Phase 800 remembers your most recently used mode and defaults to it the next time you turn it on. Once you’ve finished shredding up the local gravel, don’t forget to recharge your light. It just needs a handy micro-USB cable to be ready for when you’re next raring to ride.

    • Hadron Hadron


    • Hadron

      At a whopping 1,800 lumens, the Hadron shines like two twin suns on the front of your bars, allowing you to ride at daytime speeds long after the light fails.

      • Max power of 1,800 lumens with a wide beam angle
      • 6 different lighting modes to tailor to your riding
      • Remote control for swapping between modes at speed

      The Hadron uses twin Cree LEDs to provide a wide, bright beam that stretches well over 200m. This provides a ridiculous amount of night-time visibility so you can tackle tight and twisty singletrack at speed. It also comes with an optional remote control, allowing you to easily swap between lighting modes without needing to take your hands off the brake levers.

      With 6 different lighting modes, the Hadron’s brightness can be effectively tailored to your ride length, terrain and light levels. The lowest brightness Pulse mode runs for a massive 50 hours If you need to save battery on the roads or smoother sections. Plus, the twin bulbs are much more energy efficient than single bulb set-ups.

      The Hadron is housed in a durable 6063 alloy casing to protect your light from crash damage and an IPX6 rating is sufficiently waterproof for all-weather riding. An output jack on the Hadron means you can also use its large 6,700mAh lithium ion battery to charge your GPS or phone if you find yourself out of juice on mid-trip.


    • No Mudguards (none)

    • No Mudguards
    • Sonder Fender Front MTB


    • 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.

    • SKS Commuter Mudguard Set 28 / 45mm / Black


    • SKS Commuter Mudguard Set

      High quality, full length mudguard set with high quality, stainless-steel fittings.

      Fitted by us so you don't have to go through the pain!


    • No Pannier Rack (none)

    • No Pannier Rack
    • Sonder Mool


    • Sonder Mool

      Mool is a tubular aluminium pannier rack designed to turn your adventure cross bike into a fast expedition tourer.

      Designed to work perfectly with our Sonder bikes, the Mool is a versatile and adaptable being, and will fit most bikes with traditional mounts.

      So that the Mool always has your back, a tailgate plate permits 50 and 80 mm lights or a suitable reflector.

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Santiago knows its heritage; cold-worked, air hardened steel is steeped in the history of long distance riding. But with bang up-to-date geometry, Santiago has a refreshing feel that you know will be good for years to come: 450 mm chainstays, 1.1 m wheelbase, 71 degree head angle, a fork rake of 55 and generous tyre clearance. This makes for a truly comfortable, fast, assured bike, both in its own right (audax slaying, winter riding) or when racked up for multi-month adventures.

At a Glance
Reynolds 631 steel frame for loading up and riding around the world
  • Frame: Sonder Santiago frame, Reynolds 631 steel
  • Fork: Sonder Santiago fork, Cromoly steel
  • Drivetrain: SRAM Apex1 / 1 x 11 / 11-42
  • Brakes: SRAM Level Direct hydraulic disc brakes
  • Wheelset: Sonder Alpha 700c
  • Tyres: WTB All Terrain / Comp / 700 / 35
  • Tyre clearance: up to 650b x 47 mm or 700c x 37 mm
  • Bolt-through axles with 12 x 100mm up front and 12 x 142mm at the rear
  • Full rack and guard mounts, 3 sets of bottle cage bosses
  • Flat bar for increased agility on-road and a more upright riding position

Apex 1 is a single ring 40 chainset with an 11 – 42t cassette in the back, giving you low enough gearing for tackling the climbs unloaded with the simplicity of a 1x chainset.

..Read more

Reynolds 631 steel tubing

Durable, smooth and assured on those multi-month trips Reynolds 631 steel is an excellent material for round-the-world touring where you’re completely dependent on your bike. We’d be surprised if you needed to get your frame repaired, but it’s comforting to know that finding a steel welder in the middle of nowhere is far easier than getting your alloy frame repaired.​

Traditional bike, contemporary geometry

Santiago’s takes classic road bike geometry as a starting point, with a longer wheelbase and higher stack height for a more comfortable riding position and assured ride, whether you’re travelling light or fully loaded up.

Generous tyre clearance

Clearance for up to 650b x 47 mm or 700c x 37 mm tyres that make your ride more comfortable and give better grip on the bitumen as you corner.

Full traditional mounts

With full rack and guard mountains, 3 sets of bottle cage bosses and extra cage mounts on the fork, Santiago can handle being fully loaded up.

Build Spec
BuildSantiago Apex1 Flat
Frame:Santiago Frame
Fork:Santiago Fork
Headset:FSA Orbit MX Headset / 1.125
Group Set 
Shifter:SRAM Apex 1 Shifters / Flat Bar
Rear Brake:Tektro R280 / Front / 900mm / Black
Front Brake:Tektro R280 / Rear / 1500mm / Black
Rotors:Tektro Rotor / 6 Bolt / 160mm
Rear Derailleur:SRAM Apex Rear Derailleur / 1 / Long
Front Derailleur:N/A
Chainset:SRAM Apex 1 Crankset GXP / 172.5mm / 40
Bottom Bracket:SRAM Bottom Bracket / Standard
Chain:SRAM PC1110 Chain / 118 Links
Cassette:SRAM PG1130 Cassette / 11 / 11-42
Finishing Kit 
Stem:Sonder Storc / 80mm
Tape/Grips:Sonder Reels / Black
Saddle:Sonder Abode / 138 / Black
Handlebar:Sonder Aspect Riser
Wheels:Sonder Nova 700c Wheelset / Shimano
Tyres:WTB All Terrain / Comp / 700 / 35
Tubes:WTB Inner Tube / 700 / 38-45
Frame:S: 1.9 kg; M: 2.0 kg; L: 2.0 kg; XL: 2.1 kg
Pedals not included with full builds 
Geometry and Sizing


Generally we recommend:
Riders between 5ft 2in and 5ft 7in
Riders between 5ft 6in and 5ft 10in
Riders between 5ft 9in and 6ft 2in
Riders 6ft 2in and over
You can also take into consideration the standover height to ensure you pick a bike that will be a good fit. If you measure your inside leg and ensure there is a minimum of an inch from the toptube to your crotch this will give you enough seatpost adjustment to find your optimum saddle height.
Size Small Medium Large X-Large
ST - Seat tube 470 500 530 570
TT - Top tube 543 563 584 605
HT - Head tube 120 140 160 180
HA - Head angle 71 71 71 71
SA - Seat angle 73 73 72.5 72.5
CS - Chainstay 450 450 450 450
BB - BB drop 73 73 73 73
FO - Fork offset 55 55 55 55
WB - Wheelbase 1042 1063 1085 1106
SO - Stand over TBC TBC TBC TBC
RE - Reach 370 385 400 415
SK - Stack 566 585 604 623
Fork A-C 395 395 395 395
Frame Spec

Durable, comfortable, Reynolds steel frame

Weight (Frame and Fork): S: 3.3kg; M: 3.5kg; L: 3.7kg; XL: 3.9kg
Reynolds 631 steel, cold worked, air hardened seat tube, top tube and down tube
Chromoly fork and read frame
68 mm BSA threaded BB
Straight headtube (EC34) to fit 1 1/8” fork
100 mm front, 142 mm rear bolt-through dropouts
Standard 160 mm post mount disc brakes
Full rack/guard mounts
Tyre clearance for 700 x 37 mm, 650b x 47 mm tyres