Overview
Designed with a custom-butted stainless steel frame, adjustable geometry, large tires up to 29” x 2.6” or 27.5” x 2.8”, and multiple mounts for gear, the Otso Fenrir Stainless Drop Bar is perfect for long-distance touring and bikepacking. The drop bar configuration offers multiple hand positions and aerodynamic benefits, suitable for faster and longer rides on mixed terrain.
| XS | S | M | L | XL | |
| Recommended rider height | 4’10”-5’4″ | 5’3″-5’7″ | 5’7″-5’11” | 5’11”-6’3″ | 6’3″-6’6″ |
| Effective top tube | 547mm | 565mm | 583mm | 600mm | 618mm |
| Nominal head tube angle | 68° | 68° | 68° | 68° | 68° |
| Tuning Chip induced head/seat tube angle change | ±0.2° | ±0.2° | ±0.2° | ±0.2° | ±0.2° |
| Head tube length | 90mm | 100mm | 120mm | 140mm | 160mm |
| Nominal seat tube angle | 75° | 75° | 75° | 75° | 75° |
| Seat tube length | 360mm | 400mm | 450mm | 490mm | 530mm |
| Bottom bracket drop | 68-72mm | 68-72mm | 68-72mm | 68-72mm | 68-72mm |
| Chainstay length | 430-450mm | 430-450mm | 430-450mm | 430-450mm | 430-450mm |
| Wheelbase | 1090-1110mm | 1110-1120mm | 1130-1150mm | 1150-1170mm | 1170-1190mm |
| Trail | 88mm | 88mm | 88mm | 88mm | 88mm |
| Fork offset | 51mm | 51mm | 51mm | 51mm | 51mm |
| Rigid fork axle to crown length | 495mm | 495mm | 495mm | 495mm | 495mm |
| Stack | 595mm | 605mm | 623mm | 642mm | 660mm |
| Reach | 387mm | 403mm | 416mm | 428mm | 441mm |
| Standover | 754mm | 777mm | 810mm | 838mm | 866mm |
Features
Custom-Butted Stainless Steel Frame: Provides a smooth, durable ride with excellent corrosion resistance.
Adjustable Geometry: The Tuning Chip™ system allows customization of the wheelbase, bottom bracket height, and head tube angle for optimized handling on various terrains.
Wide Tire Clearance: Fits tires up to 29” x 2.6” or 27.5” x 2.8”, making it suitable for gravel and rugged trails.
Multiple Mounts for Gear: Equipped with numerous mounts on the frame and fork for carrying racks, fenders, and gear, ideal for long-distance touring and bikepacking.
Drop Bar Configuration: Designed for a capable and confident gravel bike setup, perfect for handling mixed terrain with ease.
Specs
Most components can be customized at time of order, contact us!
| DROP BAR | FLAT BAR | |
| Frame | Custom butted austenitic stainless steel frame | Custom butted austenitic stainless steel frame |
| Fork | Carbon Lithic Mountain Fork, 15mm thru axle | Carbon Lithic Mountain Fork, 15mm thru axle |
| Headset | Wolf Tooth Performance Headset | Wolf Tooth Performance Headset |
| Rear derailleur | Shimano GRX 812 1x, 11-speed | Shimano SLX M7100, 12-speed |
| Front derailleur | N/A | N/A |
| Shifters | Shimano GRX 600 mechanical, 11-speed | Shimano SLX M7100, 12-speed |
| Cassette | Shimano SLX M7000, 11-42T, 11-speed | Shimano SLX M7100, 10-51T, 12-speed |
| Brakes | Shimano RX400 Hydraulic | Shimano Deore BR-6100 |
| Cranks | Race Face Aeffect, 34T Chainring | Race Face Aeffect, 34T Chainring |
| Handlebar | Lithic Corundum aluminum compact drop with 16° flare | Aluminum, 31.8mm x 780mm, 20mm rise |
| Tape / Grips | Anti-Slip Gel Bar Tape | Wolf Tooth Grips |
| Wheels | DT Swiss M1900 29″ | DT Swiss M1900 29″ |
| Tires | Maxxis Aspen 29×2.4 WT TR EXO | Schwalbe Racing Ralph 29×2.35 Super Ground |
| Frame Sizes | XS, S, M, L, XL | XS, S, M, L, XL |
Warranty
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.