Fat Bike Performance Evolved
Voytek 2 takes what the original Voytek started and makes it better. This is a fat bike that rides like a mountain bike on snowy trails. We overhauled Voytek geometry to give you a fat bike that lets you go even faster with more confidence. Voytek 2 has adjustable geometry via the patented Tuning Chip dropout system like all Otso bikes, as well as the new GeoChip head tube system that alters geometry at the front end of the bike. It has clearance for 26" x 4.6" or 27.5" x 4.5" tires, suspension correction for a suspension fork, internal cable routing, lower standover, and several more updates. When the snow melts, swap in a 29" plus wheelset to keep the party going all year. Voytek changed the world of fat bikes when we announced it in 2016. Voytek 2 is here to do it again.
BUILD YOUR VOYTEK 2
Otso bikes are available to purchase here on our website or with our network of Otso dealers. Our Custom Bike Configurator allows you to select most component options on your bike, including drivetrain, wheelset, tires, handlebars, seatpost, anodized accent color option, and more. The Warakin is also available as a frameset if you already have parts ready to go at home. When an order is placed, the Otso team builds the bike based on your custom specs and ships it to you. Home assembly is as simple as putting on the wheels and straightening the handlebars. We’re happy to talk through options to help you build the Warakin that is perfect for you and your riding style.
Otso has a small (but growing!) network of bike shops that sell our bikes. Click the button to the right to see a map of all Otso dealers. If there is not one in your area, you can still build and order any of our bikes right here on our website. Give us a shout at sales@otsocycles.com with any questions.
Narrow Q Factor
Voytek 2 feels more like riding a mountain bike than a bike built for 26" x 4.6" tires because it has a narrow Q factor. The Q factor of a bike is the distance between the outer surfaces of your two crank-arms. The 83mm bottom bracket standard of the Voytek 2 allows for the narrowest Q factor of any fat bike. Benefits of a narrow Q factor include: agile handling, stronger power transfer, more efficient pedaling, increased overall performance, and a more natural ride-feel because the bike is closer to your normal biomechanics.
Adjustable Geometry
When pairing the GeoChip head tube system with the Tuning Chip rear dropout system, Voytek 2 geometry has unprecedented adjustability. Pair a long wheelbase with a slack head tube angle for a stable ride in deep snow. Pair a short wheelbase with a steeper head tube angle for a responsive ride on packed, tacky snow. Or mix and match based on your riding style.
Customize Reach and Head Tube Angle
GeoChip is a new integrated system that allows you to adjust reach and head tube angle. Three sets of flip chips nest in the frame and hold the headset upper and lower cups. One set of GeoChip flip chips allows for +/- 10mm of reach adjustment, another allows for +/- 1º of head tube angle adjustment, and the third allows for +/- 2º of head tube angle adjustment. This means that you can easily adjust your reach or head tube angle at home based on the riding ahead. With two reach options for each bike due to GeoChip, Voytek 2 effectively has eight frame sizes.
Tuning Chip Rear Dropout System
Many Otso bikes are equipped with adjustable geometry via our patented Tuning Chip rear dropout system. The Tuning Chip can adjust the wheelbase by up to 20mm, raise or lower the bottom bracket by up to 4mm, and adjust the head tube angle by +/- 0.5º. With the machined aluminum flip chip in the rear position, Voytek 2 has a longer wheelbase, lower bottom bracket, and slacker head tube angle for confidence and stability in deeper snow. Use the front position for more responsive handling on packed trails with tight turns. A middle position chip pairs the best of both worlds.
Tire Clearance and Wheel Swapping
Voytek 2 can fit 26" x 4.6" or 27.5" x 4.5" tires on the stock rims. A full breakdown of tire/rim pairings can be found below in the Tech Specs. To achieve this wide tire clearance with an extremely narrow bottom bracket, the rear hub has a 5mm outboard offset to prevent chain rub. Voytek 2 can also fit 29" x 3.0" tires. So when the trails are packed with snow, ride 26" x 4.0" tires, then when the snow melts and the trails turn to dirt, swap in your 29" wheelset for plus mountain bike riding. Voytek 2 was designed to accommodate multiple wheel sizes without compromising ride quality.
Modern MTB Geometry
Voytek 2 builds on the geometry that we pioneered with our original Voytek. We gave Voytek 2 a slacker head tube angle, steeper seat tube angle, shorter standover. This updated geometry allows you to go faster on snowy trails with more confidence.
Suspension Correction
Voytek 2 is suspension corrected. This means that you can build it with a 120mm travel suspension fork without drastically changing the geometry of the bike with a rigid fork.
Dropper Compatibility
Dropper post routing has a fully internal sleeve via a port behind the head tube. The Wolf Tooth Resolve Dropper Post is an option on the Voytek 2 Custom Bike Builder.
Large Front Triangle
A larger front triangle means that you can fit more cargo for your ride. Use this space for a custom frame bag, two bottles, or anything else that you need to carry for the ride ahead.
Geometry
GeoChip Head Tube System
Rear Tuning Chip
| Frame Size | S | M | L | XL |
| Recommended Rider Height | 4'9" - 5'6" | 5'5" - 5'10" | 5'9" - 6'2" | 6'1" - 6'8" |
| Recommended Rider Inseam | 29" - 32" | 31" - 33" | 32" - 35" | 34" - 37" |
| Reach | 433 | 454 | 467 | 487 |
| Stack | 581 | 595 | 619 | 637 |
| Effective Top Tube (ETT) | 600 | 625 | 645 | 670 |
| Seat Tube Length C-T (STL) | 380 | 420 | 465 | 510 |
| Head Tube Angle (HTA) | 67.8 | 67.8 | 67.8 | 67.8 |
| Seat Tube Angle (STA) | 73.8 | 73.8 | 73.8 | 73.8 |
| Head Tube Length (HTL) | 95 | 110 | 136 | 156 |
| Chainstay Length | 450 | 450 | 450 | 450 |
| BB Drop | 63 | 63 | 63 | 63 |
| Fork Rake / Offset | 51 | 51 | 51 | 51 |
| Fork Axle to Crown | 485 | 485 | 485 | 485 |
| Wheelbase | 1148 | 1174 | 1197 | 1224 |
| Trail 26x4.0" | 93 | 93 | 93 | 93 |
| Trail 27.5x4.0" | 101 | 101 | 101 | 101 |
| Trail 29x2.6" | 99 | 99 | 99 | 99 |
| Standover 26x4.0" | 691 | 724 | 764 | 801 |
| Standover 27.5x4.0" | 711 | 744 | 784 | 821 |
| Standover 29x2.6" | 706 | 739 | 779 | 816 |
TECHNICAL DETAILS
Build Specs
Frame Specs
Tires & Rims
Approved fit (tire width <105mm):
26x4.0" 45NRTH Dillinger 4 on Sun Ringle Mulefut 80 - All positions
26x4.0" 45NRTH Dillinger 4 on Hed Big Deal 85 - All positions
27.5x3.8" 45NRTH Dillinger 4 on Sun Ringle Mulefut 80 - Rear and middle only
Tight fit (tire width 105-108mm, some chain rub likely with 12 speed):
26x4.6" 45NRTH Dunderbeist on Sun Ringle Mulefut 80 - All positions
27.5x4.5" 45NRTH Dillinger 5 on Sun Ringle Mulefut 80 - Rear position only
*For wheel/tire combinations not listed above, the max tire width should not exceed 105mm if you are running 12 speed, should not exceed 108mm if you are running 11 speed (or less), and clearance to the frame should never be less than 6mm.
**Tire width and runout can vary by a couple millimeters, and tubeless tires will stretch slightly over time. Wheel dish will also affect chain clearance. Our tests were performed with new tires at 10psi with the wheel/tire centered in the frame. (Note that the frame is designed to offset the rear hub 5mm to the driveside but the wheels are dished 5mm to the non-driveside so the rim/tire is centered in the frame.)
Racks & Fenders
Compatible fenders
PDW - Mud Shovel
compatible racks
Axiom - Fatliner Fat Bike Rear Rack (requires Problem Solvers Seatpost Clamp w/ Rack Mounts)
Topeak - Uni Super Tourist Fat Rear Rack (requires Problem Solvers Seatpost Clamp w/ Rack Mounts)
Blackburn - Outpost Fat Rear Rack (requires Problem Solvers Seatpost Clamp w/ Rack Mounts)
Old Man Mountain - Divide Front Rack axle mounted with Fit Kit SET715
Old Man Mountain - Divide Rear Rack axle mounted with custom Fit Kit SET808 with 12mm flat spacer
Frame Bag Dimensions
(click on links to view PDF drawings)