Otso Arctodus TI Frameset
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Otso Arctodus TI Frameset
Product Details
The Otso Arctodus Ti, aptly named after the colossal Ice Age bear Arctodus simus, embodies the spirit of winter exploration. Crafted with a lightweight titanium frame, this bike thrives on versatility, strength, and durability, conquering snowy terrains with ease. Boasting a large front triangle for ample cargo space and adjustable geometry designed for flotation and control in deep snow, the Arctodus Ti is your steadfast companion on the fine line between adventure and expedition.
Designed around a 26” x 4.8” tire, the Arctodus Ti offers optimal handling on loose trails and accommodates the biggest fat bike tires on the market: 26” x 5.05” and 27.5” x 4.5”. Its unique 5mm offset on the rear wheel allows for a narrow bottom bracket, clearing these large tires with a 12-speed drivetrain. With a Tuning Chip rear dropout system enabling customizable wheelbase length, bottom bracket height, and head tube angle, and compatibility with Wolf Tooth GeoShift Angle Headsets, the Arctodus Ti adapts effortlessly to varying trail conditions, ensuring an answer to every adventure, from groomed trails to polar expeditions.
| *Please note that bike specifications are subject to change without prior notice |
| Bottom Bracket Standard | 100mm BSA threaded |
|---|---|
| Q Factor | 205mm with Race Face Aeffect crankset |
| Maximum Chainring Size | 36T round or 34T oval |
| Front Derailleur Type | None. 1x only bike. |
| Headset | ZS44 upper, EC44 lower |
| Seatpost Diameter | Ø31.6mm, accommodates internally routed dropper post |
| Seatpost Clamp | Ø34.9mm |
| Front/Rear Hub Standard | 150x15mm thru axle / 197x12mm thru axle, the rear end is offset 5mm to the driveside, so wheel must be dished to the non-drive side |
| Front/Rear Axle | Ø15x150mm, TP=1.5, TL=12mm / Ø12x235mm, TP=1.5, TL=14mm |
| Rear Dropouts | Tuning Chip Dropout with adjustable chainstay length, offset 5mm |
| 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 for 100-120mm travel forks |
| Fork Offset | 51mm |
| Bare Frame Weight | 2429g S | 2487g M | 2550g L | 2621g XL |
| Fork Weight (Otso Rigid Fork) | 650g |
| Tire Clearance (Frame) | Up to 26" x 5.25" or 27.5" x 4.5" or 29" x 3" in all Tuning Chip positions |
| Tire Clearance (Fork) | Up to 26" x 5.4" on 100mm rim |
| 120mm Fork Note | Using a 120mm suspension fork will slacken the head tube angle by 0.5˚ |
| Frame Bag Dimensions | Small Medium Large X-Large |
| Seatpost Insertion Depth | 220mm S | 270mm M | 310mm L | 350mm XL |
| Max Weight (Rider + Gear) | 275 lbs. |
| Max Spacer Stack Under Stem | 40mm |
| Max Spacer Stack Above Stem | 10mm |
| Max Stem Bolt Torque | 6 Nm |
| Size | Small | Medium | Large | X-Large |
|---|---|---|---|---|
| Recommended Rider Height | 4'9"-5'5" | 5'5"-5'9" | 5'9"-6'1" | 6'1"-6'7" |
| Recommended Rider Inseam | 29"-32" | 31"-33" | 32"-35" | 34"-37" |
| Effective Top Tube | 589mm | 610mm | 632mm | 663mm |
| Nominal Head Tube Angle | 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 | 90mm | 100mm | 140mm |
| Nominal Seat Tube Angle | 74° | 74° | 74° | 74° |
| Seat Tube Length | 380mm | 420mm | 465mm | 510mm |
| Bottom Bracket Drop | 80mm | 80mm | 80mm | 80mm |
| Chainstay Length | 440-460mm | 440-460mm | 440-460mm | 440-460mm |
| Wheelbase | 1119-1139mm | 1140-1160mm | 1162-1182mm | 1197-1217mm |
| Trail | 94mm | 94mm | 94mm | 94mm |
| Fork Offset | 51mm | 51mm | 51mm | 51mm |
| Rigid Fork Axle to Crown Length | 485mm | 485mm | 485mm | 485mm |
| Stack | 607mm | 607mm | 617mm | 654mm |
| Reach | 415mm | 435mm | 455mm | 475mm |
| Standover | 707mm | 736mm | 773mm | 810mm |