Skip to main content

Otso Arctodus Ti - SLX

Otso Arctodus Ti - SLX
Please select options Unavailable
Sorry, this item is currently not available.


Exploration requires versatility, strength, and durability because it is impossible to know what lies around the bend of the snowy trail. Arctodus Ti was created for the winter unknown. It was named after Arctodus simus, an Ice Age behemoth that was the biggest bear to ever walk the Earth. As a massive bear itself, Arctodus Ti doesn’t worry about covering vast distances in changing conditions. It has a lightweight titanium frame, a large front triangle for lots of cargo, and adjustable geometry that was designed for flotation and control in deep snow. There’s a fine line between an adventure and an expedition. This is the bike to help you find it.

Angry Catfish's website is tied into Otso's available inventory. If you are visiting our store to view the bike, please contact us before coming, to ensure we have what you're looking for.

We designed Arctodus around a 26” x 4.8” tire for optimal handling and control on loose trails. You’ll have a hard time finding a 26” or 27.5” fat bike tire that doesn’t fit in the Arctodus Ti frame. That’s because this bike fits the biggest fat bike tires on the market: 26” x 5.05” and 27.5” x 4.5”. In fact, Arctodus Ti is the only fat bike with this narrow of a bottom bracket to clear tires this big with a 12-speed drivetrain. We achieve this by using a 5mm offset on the rear wheel. A big bear needs big paws, after all.

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 Ti has an answer.

We didn’t hold back when testing Arctodus Ti prototypes. It’s not like we designed this bike to be confined to groomed trails. Arctodus Ti was made for riding dogsled routes, forest paths, and frozen fjords. The titanium frame is durable enough to meet the demands of a Polar expedition. A large front triangle can fit your trusty full frame bag, while the carbon fork has matching three-pack mounts for extra gear. There is even an option for a rear rack that can be attached via mounts on the seat stays. The adjustable geometry was developed for exploration, with extra trail for optimal stability in deep snow. Arctodus Ti feels at home in your local forest or well north of the Arctic Circle. The mushers in Svalbard seem to like it.

Arctodus Ti has a 100mm bottom bracket. This is 20mm 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 Ti is compatible with suspension forks that have up to 120mm of travel. A few options are available on the Custom Bike Builder.

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

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


Frame Titanium with Tuning Chip™? dropout system
Fork Lithic full carbon fork, 15mm thru axle
Headset Wolf Tooth Performance headset
Rims/Wheels Lithic Cryolite 100, 26", 97mm inner width, 150x15 thru axle front, 197x12 thru axle rear
Tires Schwalbe Al Mighty 26x4.8
Crankset Race Face Aeffect, Wolf Tooth CAMO 32T Round Chainring: 170mm S | 170mm M | 175mm L | 175mm XL
Bottom Bracket Race Face, BSA 100mm
Chain Shimano SLX 12-speed
Rear Derailleur Shimano SLX M7100, 12-speed
Rear Cogs Shimano SLX M7100, 10-51T, 12-speed
Shifters Shimano SLX M7100, 12-speed
Handlebars Aluminum, 31.8mm x 780mm, 20mm rise
Tape/Grips Wolf Tooth Fat Paw Grips, black
Stem Aluminum +/- 7, 60mm S | 70mm M | 80mm L | 90mm XL
Brakes Magura MT4
Saddle WTB Volt 142mm
Seat Post Aluminum, 31.6mm x 400mm
Seat Binder Wolf Tooth 34.9, black
Weight 32 lbs with rigid fork, tubeless

* Subject to change without notice.