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    IMPOSSIBLY FA(S)T

    LOOKS CAN BE DECEIVING

    Bears appear to be slow, lumbering creatures; but appearances can be deceiving. If you've ever been chased down by a bear – and we hope you never have (or will be) – you know they are quite fast. The same is true of Voytek.

    Named after a Nazi fighting bear, Voytek is an exceptional creature. It has the 'go anywhere' benefits of a fat bike but rides (and handles) like a mountain bike.

    WHEELIES GALORE!

    The Voytek can run a wide range of wheel sizes – from 27.5+ MTB tires to 26x4.6-inch fat tires.

    NARROW Q-FACTOR

    Voytek’s narrow Q-factor helps reduce the breeze between your knees! It’s also what makes Voytek ride like a traditional mountain bike.

    "The Voytek is not your average fat-tire machine; it’s a bike designed to be built for many different intended uses. The Voytek can be trans-formed into a plus-sized hardtail with a suspension fork and a dropper post, or it can be ridden as a fat bike with the narrowest Q-factor on the market."

    Mountain Bike Action Magazine

    "My first impressions of the Voytek are very, very positive. Not only have they designed in some features that should offer big advantages for some riders (like the narrow Q-factor) but they have also developed a very well thought out design with high quality construction."

    Fat-bike.com

    "Wide Q factor is something that fat bikers have had to live with as tires started to get wider and wider, but now that I’ve had the taste of something narrower that still fits relatively wide tires, I’m not sure I can go back."

    Bike Rumor

    "If a 4-season rider asked me what single bike to buy for year round enjoyment, the Voytek would be top of my list."

    Gear Institute

    PLUS-FAT SYSTEM

    Two tire sizes. One set of wheels. Plus AND fat, Voytek does that!

    "I feel pretty safe in saying that yes, this joyful warrior is for you. Mountain biking? It’s a riot. Bikepacking? You’re good to go. Casual fat biking? It’ll be the easiest bike to toss in your buddy’s truck. Fat bike racing? Considering how incredibly stiff — not to mention light — the frame is, racing might be this bike’s calling."

    Adventure Cycling

    "Otso blurs the line between plus-size and fat. It’s a carbon-fiber hardtail built for riders who need high performance and good value, transforming between two setups: mountain bike and fat bike. It does so with no compromise and has the narrowest Q-factor of any production fat bike."

    GearJunkie

    "It’s the bike I’ve been wanting for years because, at last, your year-round rig can double as a winter fattie without compromise in either format."

    Outside Magazine

    "It’s smartly designed and its details well thought-out, it’s reasonably priced, looks good, rides and handles well, and should last for ages. What’s not to like?"

    CyclingTips

    TUNING CHIP™

    The patent pending Tuning Chip™ system provides 20mm of chainstay length and 4mm of bottom bracket height adjustment, allowing you to fine tune your ride.

    AND SO MUCH MORE ...

    MODERN GEOMETRY

    Voytek's longer top tube, short chainstays – the shortest in the world for a fat bike – and slightly slacker head tube angle mean more speed and more fun.

    PROPORTIONAL SIZING

    We invested extra time and money making sure every important dimension is adjusted for each frame size to give every rider the best fit possible, from smallest to tallest.

    COMPETITOR TESTED, ISO APPROVED

    Voytek's patent-pending frame design exceeds all ISO frame safety standards and has been proven over thousands of miles of test riding, including the legendary Iditarod Invitational and Arrowhead 135 competitions.

    100% CARBON, ZERO COMPROMISE

    Voytek's 100% EPS molded carbon fiber provides smooth interior walls and optimized carbon compaction with no aluminum inserts or structural fiberglass.

    SUSPENSION CORRECT

    Voytek's suspension-corrected geometry is compatible with an Otso™ carbon rigid fork or up to 120 mm travel suspension fork.

    HAVE RACKS? WILL TRAVEL

    Numerous integrated but well-hidden rack and fender mounts are quite useful to more adventure-minded riders.

    HIP TO THE DROP

    The Voytek frame is compatible with internally routed dropper seat posts.

    QUALITY ASSURED

    Designed by the Otso engineering team, Voytek frames are manufactured in one of the premiere carbon fiber factories in Taiwan and come with a two-year limited warranty. All bikes are inspected and assembled at our headquarters in Minneapolis, MN USA.

    TECHNICAL DETAILS

    • Base Build
    • Frame Specs
    • Geometry
    • Tires & Rims

    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

    Cane Creek 10 Series, IS41/IS52, with Wolf Tooth spacers and stem cap

    Rear derailleur

    Shimano SLX, 11 speed

    Front derailleur

    None, 1x only bike

    Shifters

    Shimano SLX Trigger, 11 speed

    Cassette

    Shimano SLX, 11-46t, 11 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

    Lock-on 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 HG-11X

    Frame Sizes

    S, M, L, XL

    Weight (size M)

    25.4 lbs with rigid fork set up tubeless

    Bottom bracket standard

    83mm (Press Fit 107)

    Q-factor

    183mm with Race Face Next SL crankset, 188mm with Race Face Aeffect crankset

    Maximum chainring size

    36T round or 34T oval

    Front derailleur type

    None. 1x only bike.

    Headset

    IS41 upper, IS52 lower

    Seatpost diameter

    Ø30.9mm, accommodates internally routed dropper post

    Seatpost clamp

    Ø34.9mm

    Front/rear hub standard

    150x15mm thru axle / 177x12mm thru axle

    Front/rear axle

    Ø15x150mm, TP = 1.5, TL = 12mm / Ø12x216mm, TP = 1.5, TL = 14mm

    Derailleur hanger

    Tuning Chip Right Dropout

    Rear brake (rotor)

    74mm post (160mm native, 180mm max)

    Front brake (rotor)

    74mm post (160mm native, 180mm max)

    Fork axle-to-crown

    485mm, suspension corrected to 100-120mm travel forks

    Fork offset

    51mm

    Bare frame weight (size M)

    1350g

    Fork weight (Otso rigid fork)

    650g

    Tire clearance (frame)

    Up to 26 x 4.0" in forward Tuning Chip position, up to 26 x 4.6" in middle and back position

    Tire clearance (fork)

    Up to 26 x 4.8" on 100mm rim

    120mm fork note

    Using a 120mm suspension fork with slacken the head tube angle by 0.5˚

    S M L XL

    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

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