Sonder Vir Fortis GX Eagle

Sonder Vir Fortis GX Eagle

[Bikes] Complete Bikes

$2,505.00

Carbon fat bike with SRAM GX Eagle

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All Sonder bikes can be customised.
You can make your selections on the next page.

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

    Size
    Please select your Size

    Configure your Frame

    size

    • Small

    • Medium

    • Large

  • Brakes

    Brakeset
    SRAM Guide R Brakes 180F 160R

    Configure your Brakes

    Brakeset

    • SRAM Guide R Brakes 180F 160R

    • SRAM Guide R Brakes 180F 160R
  • Finishing kit

    Grips
    Love Mud Clutch Black
    Handlebar
    Love Mud Aspect Riser 780mm
    Headset spacers
    Love Mud Rings Black
    Headset
    FSA Orbit C-40-ACB Headset 7.8mm Spacer
    Saddle
    Love Mud Abode Black
    Seat clamp
    Love Mud Gromit 34.9mm 31.8mm
    Seatpost
    Love Mud Membar 31.6mm / 400mm
    Stem
    Love Mud Piskie Stem 31.8mm / 35mm 31.8mm / 45mm 31.8mm / 55mm

    Configure your Finishing kit

    Grips

    • Love Mud Clutch Black

    • Love Mud Clutch [OEM]

    Handlebar

    • Love Mud Aspect Riser 780mm

    • Love Mud Aspect Riser [OEM]

    Headset spacers

    • Love Mud Rings Black

    • Love Mud Rings [OEM]

    Headset

    • FSA Orbit C-40-ACB Headset 7.8mm Spacer

    • FSA [OEM] Orbit C-40-ACB Headset

    Saddle

    • Love Mud Abode Black

    • Love Mud Abode [OEM]

    Seat clamp

    • Love Mud Gromit 34.9mm

    • Love Mud Gromit [OEM]
    • Love Mud Gromit 31.8mm

    • Love Mud Gromit [OEM]

    Seatpost

    • Love Mud Membar 31.6mm / 400mm

    • Love Mud Membar [OEM]

    Stem

    • Love Mud Piskie Stem 31.8mm / 35mm

    • Love Mud Piskie Stem [OEM]
    • Love Mud Piskie Stem 31.8mm / 45mm

    • Love Mud Piskie Stem [OEM]
    • Love Mud Piskie Stem 31.8mm / 55mm

    • Love Mud Piskie Stem [OEM]
  • Groupset

    Groupset
    SRAM GX Eagle Fat Groupset 170mm 11-50

    Configure your Groupset

    Groupset

    • SRAM GX Eagle Fat Groupset 170mm 11-50

    • SRAM GX Eagle Fat Groupset 170mm 11-50
  • Wheels

    Front tyre
    Vee Bull Dozer
    Inner tubes
    VEE Inner Tube
    Rear tyre
    Vee Bull Dozer
    Wheelset
    Love Mud Hurlyburly Wheelset

    Configure your Wheels

    Front tyre

    • Vee Bull Dozer 26 / 4.25

    • Vee Bull Dozer

    Inner tubes

    • VEE Inner Tube 26 / 4.00-4.80

    • VEE Inner Tube

    Rear tyre

    • Vee Bull Dozer 26 / 4.25

    • Vee Bull Dozer

    Wheelset

    • Love Mud Hurlyburly Wheelset

    • Love Mud Hurlyburly Wheelset [OEM]
Initial Price
$2,505.00
Extras
$0.00
Grand Price
$2,505.00
Go to Checkout
Description

When you want to go places a regular skinny bike won’t, go you need a hero. Enter Vir Fortis, a bike made for terrain that may never have been navigated on two wheels, crushing turnips, or for just in case you get snowed in and need to save the neighbourhood.

At a glance
  • Fat, light, and comfy for wilderness exploration
  • Frame: Sonder Vir Fortis, high grade T700 carbon
  • Drivetrain: SRAM GX Eagle
  • Fork: Vir Fortis, high grade T700 carbon
  • Seatpost: Love Mud Membar, 31.6 mm
  • Wheelset: Love Mud Hurlyburly
  • Tyres: Vee Rubber Bulldozer 4.5

Vir Fortis is designed to go anywhere, big tyres and big wheels gives a massive amount of traction.

Vir Fortis is not just strong, it is light too: a medium frame weighing in at just 1550g and letting you float over the wildest trails like a cloud. It looks sharp: cables are routed internally to avoid snagging and keep things clean, and a single mounting point on the downtube gives you the option to add a bottle cage.

With a race-winning pedigree, Vir Fortis inspires you to explore the outer boundaries of the trails. Its slackened off geometry gives a characterful ride and is compatible with tyres up to a chunky 4.8”. It’s carbon frame and fork gives precise handling and trail bike feel.

It has taken on some of the roughest rides in the wildest terrain, and come out on top.

Reviews

Customer Reviews

Based on 2 reviews Write a review
Geometry and Sizing

Sizing

It is important to get the right size bike, if the bike fits it will be faster, more comfortable and easier to handle. 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. Generally we recommend: Small Riders between 5ft 2in and 5ft 7in Medium Riders between 5ft 6in and 5ft 10in Large Riders between 5ft 9in and 6ft 2in
Size Small Medium Large
ST - Seat tube 406 457 505
TT - Top tube 580 605 625
HT - Head tube 100 110 130
HA - Head angle 68.5 68.5 68.5
SA - Seat angle 73.5 73 73
CS - Chainstay 445 445 445
BB - BB drop 60 60 60
FO - Fork offset 45 45 45
WB - Wheelbase 1103 1123 1145
SO - Stand over
RE - Reach 406 423 437
SK - Stack 586 595 614
Build Spec
Build SRAM GX Eagle, 1 x 11
Frameset
Frame Vir Fortis Carbon
Fork Vir Fortis Carbon
Headset Love Mud Rumour No 42, Integrated Sealed Bearing, Tapered
Seat clamp Love Mud Silent Partner, 34.9 mm
Drivetrain
Brake Front SRAM Guide R
Brake Rear SRAM Guide R
Rotor Front Avid Centreline 180 mm
Rotor Rear Avid Centreline 160 mm
Rear Mech SRAM GX Eagle Derailleur
Shifter Rear SRAM GX Eagle Shifter
Chainset SRAM GX Eagle Fat4 Chainset, 30t chainring
Bottom Bracket SRAM DUB Bottom Bracket
Chain SRAM GX Eagle Chain
Cassette SRAM XG1275 Eagle Cassette 10-50t
Finishing Kit
Stem Love Mud Piskie, 40 mm
Seatpost Love Mud Membar, 31.6 mm
Saddle Love Mud Abode
Tape/Grips Love Mud Grabby
Handlebar Love Mud Aspect Riser, 740 mm wide
Spacers Love Mud (3x10 mm, 1x5 mm)
Wheelset
Rims Love Mud Hurlyburly
Hubs Love Mud
Spokes TBC
Tyres Vee Rubber Bulldozer 4.5
Tubes Vee Rubber
Weight
Frame S: TBC kg; M: TBC kg; L: TBC kg; XL: TBC kg
Fork (uncut) TBC kg
Built S: TBC; M: TBC kg; L: TBC
Unfortunately we haven't been able to weigh these bikes yet, please bear with us and we'll update this page as soon as we can
   
Pedals not included with full builds
FAQs
TBC
Frame Spec
Carbon is the most versatile material for building a bike frame, not only can you mold it to look exactly how you want, you can also layer it up differently to affect the ride characteristics. This allows us to build frames that are stiff in the areas they need to be and have the right amount of compliance in others making for an incredibly lively but comfortable ride.
Frame Weight (kg): S: TBC; M: TBC; L: TBC
Fork Weight - uncut: TBC
Toray T700 carbon fibre
Headset: IS42/28.6 | IS52/40
Seat post: 31.6 mm
Seat tube OD: 34.9 mm
100mm BSA BB shell
Features

Hand laid carbon fibre frame and fork

Using Toray’s highest grade of carbon, T700, this frame is manufactured in a clinical environment to the highest standards. The result is an extremely strong, lightweight frame that is a blast to ride! Guaranteed for 5 years

Trail bike inspired geometry

The Vir Fortis take fun to the next level by slackening the bike out a bit, giving it a more relaxed, playful character. With natural air suspension from the enormous tyre volume Vir Fortis is ready to roll over all terrains.

Internally tapered head tube

Who would choose to be a head tube? You might as well step into the ring with Mike Tyson. It is a critical junction point where forces are distributed around the frame and steering precision is won or lost. Vir Fortis uses a fully integrated internal headset and a fork with a tapered carbon steerer tube to make sure you hold your line over broken ground.

Disk brake compatible

​Once rolling you will be surprised by how you can carry your momentum which is why you are going to be thankful for the stopping power of disc brakes. The Vir Fortis carbon frame is fully compatible with disc brakes.

High spec builds

If you’ve a dream build in mind, please get in touch and we’ll do our best to source the parts you want.