Otso Arctodus Ti XT


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Whether you’re navigating groomed trails or exploring untamed snow-covered paths, the Arctodus Ti XT is your reliable companion for any winter expedition.


The Otso Arctodus Ti XT is your go-to fat bike for winter adventures and rugged trails. With a lightweight titanium frame, this bike offers strength, versatility, and durability to tackle snowy terrains with ease. The large front triangle allows for ample cargo storage, making it perfect for long expeditions.


Titanium Frame: The Arctodus Ti XT features a lightweight and durable titanium frame, providing strength and resilience for harsh conditions.

Adjustable Geometry: With the Tuning Chip™ dropout system, you can adjust the wheelbase length, bottom bracket height, and head tube angle. This allows for optimal performance in various terrains.

Tire Clearance: It can accommodate up to 26” x 5.05” or 27.5” x 4.5” tires, offering superior handling on loose and snowy trails.

Shimano Deore XT Components: Equipped with Shimano Deore XT M8100, 12-speed drivetrain and brakes, ensuring reliable and smooth performance.

Carbon Fork: The Lithic full carbon fork with a 15mm thru axle provides a lightweight front end with excellent shock absorption.

Cargo Capacity: The large front triangle is designed to carry ample gear, perfect for long expeditions.

Versatility: Compatible with Wolf Tooth GeoShift Angle Headsets, enabling further customization of head tube angles for different riding conditions.

Suspension Ready: The frame is suspension corrected for 100-120mm travel forks, offering additional comfort and control on rough trails.

Narrow Q Factor: The 100mm bottom bracket is 20mm narrower than other fat bikes with similar tire clearances, improving handling and pedaling efficiency.

Stability & Flotation: The bike’s geometry, including a 68.5° head tube angle, is optimized for stability and control in deep snow and soft conditions.


  • Bottom Bracket: Race Face, BSA 100mm.
  • Q Factor: 205mm with Race Face Aeffect crankset.
  • Maximum Chainring Size: 36T round or 34T oval.
  • Front Derailleur: None (1x only bike).
  • Headset: Wolf Tooth Performance headset, ZS44 upper, EC44 lower.
  • Seatpost: FSA SL-K Carbon, 31.6mm x 400mm, accommodates internally routed dropper post.
  • Seatpost Clamp: Wolf Tooth 34.9, black.
  • Hub Standards:
    • Front: 150x15mm thru axle.
    • Rear: 197x12mm thru axle (5mm offset to the drive side, wheel must be dished to the non-drive side).
  • Axles:
    • Front: Ø15x150mm, TP=1.5, TL=12mm.
    • Rear: Ø12x235mm, TP=1.5, TL=14mm.
  • Rear Dropouts: Tuning Chip Dropout with adjustable chainstay length, offset 5mm.
  • Derailleur Hanger: Tuning Chip Right Dropout.
  • Brakes:
    • Rear: 74mm post mount (160mm native, 180mm max).
    • Front: 74mm post mount (160mm native, 180mm max).
  • Fork:
    • Axle-to-Crown: 485mm, suspension corrected for 100-120mm travel forks.
    • Offset: 51mm.
  • Tire Clearance:
    • Frame: Up to 26″ x 5.25″, 27.5″ x 4.5″, or 29″ x 3″ in all Tuning Chip positions.
    • Fork: Up to 26″ x 5.4″ on a 100mm rim.
  • Geometry Adjustment: Tuning Chip system adjusts wheelbase length, bottom bracket height, and head tube angle, compatible with Wolf Tooth GeoShift Angle Headsets.
  • Seatpost Insertion Depth:
    • Small: 220mm.
    • Medium: 270mm.
    • Large: 310mm.
    • X-Large: 350mm.
  • Max Weight (Rider + Gear): 275 lbs.
  • Max Spacer Stack:
    • Under Stem: 40mm.
    • Above Stem: 10mm.
  • Max Stem Bolt Torque: 6 Nm.



Warranty Coverage:

  • All Otso frames are warranted against defects in materials and workmanship for 5 years from the date of retail purchase.
  • This warranty applies to the original owner only and is not transferable.
  • Please keep your sales receipt or order number for any warranty claims to ensure a quick resolution.

What’s Not Covered:

  • Damage from improper assembly, maintenance, or user/assembler inexperience.
  • Modifications, neglect, misuse, competition, commercial use, or accidents.
  • Installation of incompatible components, parts, or accessories.
  • Normal wear and tear, or damage to paint, surface finish, or aesthetics.
  • Compatibility of original components with a replacement frame is not guaranteed.
  • Costs for labor, parts removal, refitting, or re-adjustment, including wheel rebuilds.

Claim Process:

  • Warranty claims are limited to the repair or replacement of the defective frame, at Otso’s discretion.
  • This warranty does not cover incidental or consequential damages.

Legal Information:

  • This warranty gives you specific legal rights, which may vary based on location. It does not affect your statutory rights.