SKU: 210000116648

Otso Voytek XT Build

SKU: 210000116648

Otso Voytek XT Build

Brand: Otso
Categories: Fat-bike
More Information
Otso Voytek XT Build Otso Voytek XT Build

Otso Voytek XT Build

The Otso Voytek XT Build fat bike opens up a whole new dimension of versatility in summer or winter riding, with MTB geometry.


Product Description

The Otso Voytek is a carbon fiber hardtail mountain bike designed around the exclusive Otso Plus-Fat concept. It is a 27.5+ or 29+ trail bike that can also accommodate up to 26 x 4.6” tires on 70 mm rims. With the narrowest Q-factor of any production fat-tire-capable bike, it feels like a mountain bike, not a fat bike, and opens up a whole new dimension of versatility in summer or winter riding.

Also featuring Otso's patent pending Tuning Chip rear dropout system, the chainstay length can be adjusted from a fun and nimble 430 mm to a fast and stable 450 mm. Top it all off with modern geometry, a slack head tube angle, and a short rear center, and the Voytek blurs the line between plus and fat. Ride it with fat tires in the winter, and swap to 29", 29" plus, or 27.5" plus for the summer; the Voytek can do it all.

The Otso Voytek Fat Bike Base Build uses the Voytek carbon frame and rigid carbon fork. This is paired to a Shimano XT 1x12 drivetrain, a Race Face Aeffect crankset, and Race Face finishing kit. A Lithic Rhyolite 70 mm interal wide wheelset is wrapped by a pair of Schwalbe Jumbo Jim 26 x 4.00" tires. The Voytek is available in four sizes (S-XL).

Have any questions about the Otso Voytek Fat Bike Base Build fat bike or would like another configuration? Send us an email any time to, or give us a call during business hours.



Frame Voytek™ patented carbon frame, Tuning Chip™ dropout system, 177x12 rear hub spacing, Plus-Fat Narrow Q-factor design with PF107BB, guided internal rear derailleur routing, accommodates internally routed dropper post, external brake routing, downtube and chainstay protectors, matching allow bottle cage bolts
Fork Voytek™ rigid carbon fork, suspension corrected, tapered steerer tube, 485mm axle-to-crown, 51mm offset
Headset Wolf Tooth Precision Headset, IS42/IS52
Rear derailleur Shimano SLX M7100, 12-speed
Front derailleur None, 1x only bike
Shifters Shimano SLX M7100 Trigger, 12-speed
Cassette Shimano SLX M7100, 10-51t, 12-speed
Brakes Magura MT4
Cranks Race Face Aeffect 83mm with 175mm crankarms and custom offset Wolf Tooth CAMO system, 32T chainring (size Small frame ships with 170mm crankarms, 170mm crankarms are available on other sizes by request)
Bottom bracket Race Face, PF107, Ø41mm
Handlebar Race Face Ride, 740mm riser
Grips Wolf Tooth silicone grips
Stem Race Face Ride (60mm standard. Other lengths available by request)
Seatpost Race Face Ride, 30.9mm
Seat WTB Volt
Wheels Lithic sealed cartridge bearing 6-bolt rotor hubs with tubeless ready 70mm Lithic Rhyolite aluminum rims. Tubeless kit upgrade available.
Tires Schwalbe Jumbo Jim 26 x 4.0 LiteSkin
Chain Shimano SLX 12-speed
Frame Sizes S, M, L, XL
Weight (size M) 25.4 lbs with rigid fork set up tubeless


Otso Voytek Geometry guide image

Recommended rider height 4'9"-5'5" 5'4-5'9" 5'8"-6'1" 6'0"-6'7"
Recommended rider inseam 29"-32" 31"-33" 32"-35" 34"-37"
Effective top tube 585mm 610mm 630mm 645mm
Nominal head tube angle (rigid and 100mm suspension fork) 69° 69° 69° 69°
Nominal head tube angle (120mm suspension fork) 68.5° 68.5° 68.5° 68.5°
Tuning Chip induced head/seat tube angle change ±0.2° ±0.2° ±0.2° ±0.2°
Head tube length 90mm 115mm 130mm 150mm
Nominal seat tube angle 73° 73° 73° 73°
Seat tube length 381mm 432mm 483mm 533mm
Bottom bracket drop 58-62mm 58-62mm 58-62mm 58-62mm
Chainstay length 430-450mm 430-450mm 430-450mm 430-450mm
Wheelbase 1092-1112mm 1118-1138mm 1139-1159mm 1156-1176mm
Trail 85.5mm 85.5mm 85.5mm 85.5mm
Fork offset 51mm 51mm 51mm 51mm
Rigid fork axle to crown length 485mm 485mm 485mm 485mm
Stack 581mm 602mm 616mm 634mm
Reach 407mm 426mm 442mm 451mm
Standover 697mm 739mm 780mm 815mm