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    Voytek Bikes

    When describing a fat bike, you wouldn’t typically describe it as agile. That’s where the Voytek is different. We paired a narrow pedal stance--aka Q factor--with aggressive XC race geometry to build a fat bike that can intuitively handle snowy trails like your mountain bike can handle summer singletrack.

    THE Q FACTOR IS THE KEY

    With a narrow Q factor, your weight is closer to the centerline of the bike. This is especially important when cornering because it allows for tight, responsive control--the wider Q factor found on most fat bikes spreads out your pedals and creates a floppy, unstable feel. With the Voytek, you don’t need to compromise agile handling to ride up to 4.6” tires.

    "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

    ONE BIKE,
    THREE WHEELBASE LENGTHS

    Our Tuning Chip rear dropout is at the heart of the versatile Voytek. With a quick change in positions, the wheelbase of the Voytek can be extended or shortened by up to 20mm, which also changes bottom bracket height by up to 4mm. In the forward position, you’ve got an aggressive, responsive Voytek for your next race. In the rear position, you’ve got that same intuitive handling but with added stability to make it easier to ride in deep snow or adverse terrain. In the middle, well, that’s the best of both worlds.

    "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

    PLUS OR FAT? FAT OR PLUS?

    We’re internally divided here as to whether the Voytek is a plus bike that can handle fat tires or if the Voytek is a fat bike that has the handling worthy of a plus bike. When the trails are packed with snow, we’re riding 4.6” tires. When spring comes and the trails turn to dirt, we swap out tires and ride plus until winter returns. The versatility of the Voytek blends the lines of plus and fat, keeping the party going all year long.

    WHEELIES GALORE!

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

    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 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
    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˚
    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