Overview
Unrivaled Versatility
Configure your Fenrir Ti to your bikepacking style, and yours alone. This bike can be built with the components that you need to ride with comfort and confidence for multi-day tours. Best of all, with the Fenrir geometry, there is no compromise in ride quality. However and wherever you like to ride, the Fenrir is ready.
Features
Titanium Frame: Constructed from 3Al-2.5V titanium, offering exceptional strength, lightweight performance, and excellent corrosion resistance.
Adjustable Geometry: Features the Tuning Chip™ dropout system, allowing for customization of the wheelbase and bottom bracket height for optimized handling across various terrains.
Generous Tire Clearance: Supports tires up to 29” x 2.6” or 27.5” x 2.8”, providing versatility for different riding surfaces and enhancing off-road capabilities.
Mounting Options: Equipped with multiple mounts for racks, fenders, and gear, making it ideal for bikepacking, long-distance touring, and carrying all necessary equipment for extended adventures.
Flat Bar Configuration: Provides superior control and comfort, especially on technical terrains and long rides, making it a capable and confident gravel bike setup.
| S | M | L | XL | null | ||
| Recommended rider height | 5’3″-5’7″ | 5’7″-5’11” | 5’11”-6’3″ | 6’3″-6’6″ | null | |
| Inseam | 29.5″-31″ | 31″-32″ | 32″-33″ | 33.5″-35″ | null | |
| Reach | 403mm | 416mm | 428mm | 441mm | null | |
| Stack | 605mm | 623mm | 642mm | 660mm | null | |
| Standover | 727mm | 768mm | 802mm | 835mm | null | |
| Effective top tube | 565mm | 583mm | 600mm | 618mm | null | |
| Nominal head tube angle | 68° | 68° | 68° | 68° | null | |
| Head tube length | 100mm | 120mm | 140mm | 160mm | null | |
| Nominal seat tube angle | 75° | 75° | 75° | 75° | null | |
| Seat tube length | 400mm | 450mm | 490mm | 530mm | null | |
| Bottom bracket drop | 68mm | 68mm | 68mm | 68mm | null | |
| Chainstay length | 445mm | 445mm | 445mm | 445mm | null | |
| Wheelbase | 1115mm | 1135mm | 1155mm | 1175mm | null | |
| Trail | 88mm | 88mm | 88mm | 88mm | null | |
| Fork offset | 52mm | 52mm | 52mm | 52mm | null | |
| Rigid fork axle to crown length | 495mm | 495mm | 495mm | 495mm | null | |
| Reach | 403mm | 416mm | 428mm | 441mm | null |
Specs
| Bottom bracket standard | English Threaded/BSA, 73mm |
| Maximum chainring size | 1x: 40T round or 38T oval |
| Front derailleur type | N/A |
| Headset | ZS44/28.6 upper, EC44/40.0 lower |
| Seatpost diameter | Ø31.6mm |
| Internal dropper post routing | Yes. Exit port on bottom of seat tube |
| Seatpost clamp | Ø34.9mm |
| Front/rear hub standard | 110x15mm thru axle / 148x12mm thru axle |
| Front/rear axle | Ø15x148mm front, TP=1.5, TL=12mm / Ø12x173mm rear, TP=1.0, TL=16.5mm |
| Derailleur hanger | SRAM UDH included with frames and non-Transmission drivetrains |
| Rear brake (rotor) | Flat mount, 74mm post mount available (160mm) |
| Front brake (rotor) | Lithic Mountain fork available in flat mount 160mm, and post mount 180mm |
| Rear brake mount frame thickness | 30mm (this number will help determine the rear flat mount caliper bolt lengths if sourcing your own brake calipers) |
| Fork axle-to-crown | 495mm (suspension corrected for 100-120mm suspension fork) |
| Fork offset | 44mm or 52mm |
| Bare frame weight (M) | 3.89 lbs (1,765 g) |
| Fork weight (Lithic Carbon Mountain Fork) | 650 g |
| Tire clearance (frame) | 2.6″ |
| Tire clearance (Lithic Carbon Mountain Fork) | Max clearance 29″ x 3.0″ |
| Braze-ons | Three bottle frame mounts, fender, rack, cable clamps, two three-pack mounts on fork |
| Frame Bag Dimensions | X-Small Small Medium Large X-Large |
| Seatpost Insertion Depth | X-Small 180mm; Small 200mm; Medium 250mm; Large 280mm; X-Large 320mm |
| Max weight (rider + gear) | 275 lbs |
| Max spacer stack under stem | 40mm |
| Max spacer stack above stem | 10mm |
| Max stem bolt torque | 6 Nm |
Drop Bar Build Specs
Shared Across All Drop Bar Builds
Frame: 3Al/2.5V B338 grade 9 titanium frame with 3-D printed titanium dropouts
Fork: Lithic Carbon Mountain Fork, 12mm thru-axle, flat mount, Boost
Headset: Wolf Tooth Performance Headset, ZS44/EC44, black
Headset Upgrade: Wolf Tooth Premium Headset with color options
Handlebar: Lithic Aventurine, custom width and upgrade options
Bar Tape: Anti-Slip Gel Bar Tape
Stem: Aluminum 31.8mm, custom length and upgrade options
Seatpost: Aluminum, 31.6 x 400mm, 8mm offset, custom upgrade options
Seatpost Clamp: Wolf Tooth 34.9mm, black; custom color options with headset upgrade
Saddle: WTB Silverado Medium, steel rails, 142 x 265mm
Tires: Schwalbe Rick Evo XC Pro, 29 x 2.4″, black; 27.5″ option available
Drop Bar SRAM Apex Mechanical
Rear Derailleur: SRAM Apex Eagle mechanical, 12-speed
Shifters: SRAM Apex, 12-speed
Cassette: SRAM NX 11–50T, HG, 12-speed
Brakes: SRAM Apex hydraulic
Cranks: SRAM Eagle 70, custom length and chainring options
Bottom Bracket: SRAM DUB English threaded BSA, 73mm
Wheels: DT Swiss M 1900 29″, 30mm inner width, 110 x 15mm front / 148 x 12mm rear; 27.5″ and custom upgrade options
Chain: SRAM NX Eagle 12-speed
Drop Bar Shimano GRX 600
Rear Derailleur: Shimano GRX 822 1x, 12-speed
Shifters: Shimano GRX 600 mechanical, 12-speed
Cassette: Shimano SLX M7100, 10–51T, 12-speed
Brakes: Shimano RX400 hydraulic
Cranks: Shimano Deore FC-M6120-1, 170mm, upgrade and custom chainring options
Bottom Bracket: Shimano English threaded BSA, 73mm
Wheels: DT Swiss M 1900, 30mm inner width, 110 x 15mm front / 148 x 12mm rear; custom upgrade options
Chain: Shimano SLX 12-speed
Drop Bar SRAM Rival XPLR AXS 1×13
Rear Derailleur: SRAM Rival XPLR AXS E1, 13-speed
Shifters: SRAM Rival AXS HRD E1
Cassette: SRAM XG-1351, 10–46T
Brakes: SRAM Rival hydraulic
Cranks: SRAM Eagle 70, custom length, upgrade, and chainring options
Bottom Bracket: SRAM DUB English threaded BSA, 73mm
Wheels: DT Swiss M 1900, 30mm inner width, 110 x 15mm front / 148 x 12mm rear; custom upgrade options
Chain: SRAM Rival Road Flattop, 12/13-speed
Drop Bar SRAM Force XPLR AXS 1×13
Rear Derailleur: SRAM Force XPLR AXS E1, 13-speed
Shifters: SRAM Force AXS HRD E1
Cassette: SRAM XG-1371, 10–46T
Brakes: SRAM Force hydraulic
Cranks: SRAM Eagle 70, custom length, upgrade, and chainring options
Bottom Bracket: SRAM DUB English threaded BSA, 73mm
Wheels: DT Swiss M 1900, 30mm inner width, 110 x 15mm front / 148 x 12mm rear; custom upgrade options
Chain: SRAM Force Road Flattop, 12/13-speed
Warranty
- 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.