Note: Images may not show actual build kit content. Pricing and specifications subject to change without notice. Comparable components may be substituted when necessary to fulfill bike shipments.
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 firstname.lastname@example.org with any questions.
THE BIGGEST TIRE CLEARANCE
Arctodus was built around a 26" x 4.8" tire for optimal handling and control on loose trails. It can fit the biggest fat bike tires in the world. The biggest fat tire on the market is 26" x 5.05" and Arctodus eats them like a snack with room to spare. Same as 27.5" x 4.5", which is the biggest 27.5" tire available. Arctodus is the only bike to clear tires this big with a 12-speed drivetrain without chain interference. We achieve this by using a 5mm offset with the rear wheel. When a bike is created for big rides with fresh snow, it needs to fit tires that were designed for the same reason. This is a bike that prays for snow and cuts its own trail.
A key feature in all Otso bikes is adjustable geometry and the ability to adapt the bike for the ride ahead. The patented Tuning Chip rear dropout system can change wheelbase length by up to 20mm, raise or lower the bottom bracket height by up to 4mm, and change the head tube angle by +/- 0.5º. Use the rear position when the trails are loose and you need as much control as you can get. Use the front position when the snow is firm and the trails let you take turns with a little speed. This frame is also compatible with Wolf Tooth GeoShift 1º and 2º Angle Headsets, effectively unlocking five head tube angles from 66.5º to 70.5º. No matter the conditions, Arctodus has an answer.
DESIGNED FOR EXPLORING
There's no need to wait for the trail groomer. Arctodus was made for foot trails, forest paths, and snow-covered frozen lakes. The bombproof steel frame can withstand the demands of an expedition. A large front triangle can fit a healthy full frame bag. The carbon fork has mounts on either side for cargo. A rear rack can be attached via mounts on the seat stays. Even the geometry is catered for exploration, with extra trail for optimal flotation and bottom bracket height that's friendly with deep snow. Whether you're exploring local trails or a national forest, you can trust Arctodus to keep you riding.
AND SO MUCH MORE ...
NARROW Q FACTOR
Arctodus has a 100mm bottom bracket. This is 30-40mm narrower than other fat bikes that have the same tire clearance. Ride with massive tires without compromising handling.
All Otso frames feature suspension-corrected geometry. Arctodus is compatible with suspension forks that have up to 120mm of travel. A few options are available on the Custom Bike Builder.
STABILITY & FLOATATION
Arctodus geometry was designed for optimal riding on fresh trails. The 68º head tube angle paired with massive tires gives Arctodus more trail than other fat bikes.
Snowy trails are good with dropper posts, too. A port near the bottom bracket fits a cable and housing or hydraulic hose for dropper posts that require internal frame routing.
- Build Specs
- Frame Specs
- Racks & Fenders
PDW - Mud Shovel Front and Rear Fenders
SKS - Fatboard Fender Set
Salsa - Alternator Rear Rack 190 / 197
Topeak - Uni Super Tourist Fat Rear Rack
Blackburn - Outpost Fat Rear Rack
Surly - Rear Disc Rack Wide
Frame Bag Dimensions
(click on links to view PDF drawings)