Otso Arctodus, SLX 1x12 , 26 x 4.8, Deore Brakes, MD - Navy/Peach

Big adventures require a bike that can rise to the occasion. Arctodus is named after Arctodus simus, an Ice Age behemoth that was the largest bear to ever walk the Earth. Like its namesake, Arctodus the bike is versatile, strong, and ready to explore. It has adjustable geometry, a durable steel frame, a massive front triangle for a frame bag, lots of cargo mounts, and can clear the biggest 26" and 27.5" fat bike tires on the market. Arctodus is ready for afternoon exploration, polar expeditions, and everything in between.

Arctodus was built around a 26" x 4.8" tire for optimal handling and control on loose trails. It can fit the biggest 26" and 27.5" fat bike tires in the world, at 26" x 5.05" and 27.5" x 4.5" respectively. 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 on many 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. No matter the conditions, Arctodus has an answer.

Suspension Correct

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.

GeoShift Headset

The Arctodus frame is compatible with Wolf Tooth GeoShift 1º and 2º Angle Headsets. This effectively unlocks five head tube angles, from 66.5º to 70.5º.

Dropper Compatible

A dropper post is a game changer in deep snow and technical winter riding. Arctodus has ample seat tube depth for longer travel dropper posts and a routing port just above the bottom bracket.

Stability & Flotation

Arctodus geometry was designed for optimal riding on fresh trails. The 68.5º head tube angle paired with massive tires gives Arctodus more stability than other fat bikes.

Cargo & Rack Mounts

The frame and fork of Arctodus have five mounts for cargo: three on the frame and two on the fork. A rear rack can also be added for when the route requires extra gear.

Build Specs

Arctodus	SLX
Frame	Chromoly with Tuning Chip™️ dropout system
Fork	Lithic full carbon fork, 15mm thru axle
Headset	Wolf Tooth Performance headset
Rear derailleur	Shimano SLX M7100, 12-speed
Front derailleur	N/A
Shifter	Shimano SLX M7100, 12-speed
Cassette	Shimano SLX M7100, 10-51T, 12-speed
Brakes	Shimano Deore M4100
Cranks	Race Face Aeffect, Wolf Tooth CAMO 30T Round Chainring: 170mm S \| 170mm M \| 175mm L \| 175mm XL
Bottom bracket	Race Face, BSA 100mm
Handlebar	Aluminum, 31.8mm x 780mm, 20mm rise
Grips	Wolf Tooth Fat Paw Grips, black
Stem	Aluminum +/- 7, 60mm S \| 70mm M \| 80mm L \| 90mm XL
Seatpost	Aluminum, 31.6mm x 400mm
Seatpost clamp	Wolf Tooth 34.9, black
Saddle	WTB Silverado
Wheels	Lithic Cryolite 100, 26", 97mm inner width, 150x15 thru axle front, 197x12 thru axle rear
Tires	Schwalbe Al Mighty 26x4.8
Chain	Shimano SLX 12-speed
Frame Sizes	S, M, L, XL
Weight (size M, tubeless)	34.4 lbs