Overview
| 49cm | 52cm | 54cm | 56cm | 58cm | 60m | |
| Recommended rider height | 4’11”-5’2″ | 5’2″-5’4″ | 5’4″-5’8″ | 5’8″-6’0″ | 6’0″-6’2″ | 6’2″-6’5″ |
| Recommended rider inseam | 25″-29″ | 28″-30″ | 30″-33″ | 32″-34″ | 33″-35″ | 34″-37″ |
| Effective top tube | 510mm | 530mm | 545mm | 565mm | 580mm | 600mm |
| Nominal head tube angle | 70° | 70.5° | 71° | 71.5° | 72° | 72° |
| Tuning Chip induced head/seat tube angle change | ±0.2° | ±0.2° | ±0.2° | ±0.2° | ±0.2° | ±0.2° |
| Head tube length | 87mm | 95mm | 115mm | 140mm | 165mm | 185mm |
| Nominal seat tube angle | 75° | 74.5° | 74° | 73° | 72.5° | 72° |
| Seat tube length | 400mm | 505mm | 530mm | 550mm | 570mm | 590mm |
| Bottom bracket drop | 58-62mm | 68-72mm | 68-72mm | 68-72mm | 68-72mm | 68-72mm |
| Chainstay length | 410-430mm | 420-440mm | 420-440mm | 420-440mm | 420-440mm | 420-440mm |
| Wheelbase | 1000-1020mm | 1017-1037mm | 1023-1043mm | 1028-1048mm | 1032-1052mm | 1046-1066mm |
| Trail | 70mm | 71mm | 70mm | 67.5mm | 65mm | 65mm |
| Fork offset | 47mm | 47mm | 47mm | 47mm | 47mm | 47mm |
| Rigid fork axle to crown length | 420mm | 420mm | 420mm | 420mm | 420mm | 420mm |
| Stack | 532mm | 549mm | 570mm | 596mm | 622mm | 641mm |
| Reach | 368mm | 378mm | 381mm | 383mm | 384mm | 392mm |
| Standover | 677mm | 760mm | 780mm | 800mm | 820mm | 840 mm |
Features
Tuning Chip™: Adjustable dropout system for fine-tuning wheelbase and bottom bracket height.
Multiple Braze-ons: Supports racks, fenders, and multiple water bottle mounts for versatile gear carrying options.
Progressive Geometry: Designed for stability and agility across various terrains.
Suspension Capable: Can accommodate gravel suspension forks for added comfort on rough trails.
Dropper Post Compatible: Frame supports internally routed dropper seat posts for enhanced control on descents.
Specs
Most components can be customized at time of order, contact us!
Frameset
- Frame: Otso custom butted 4130 Chromoly tubing with Tuning Chip™️ dropout system
- Fork: Lithic full carbon fork, 12mm thru-axle
Drivetrain
- Front Derailleur: N/A
- Rear Derailleur: Shimano GRX 820, 12 speed
- Cassette: Shimano 11-51T, 12-speed
- Chain: Shimano 12-speed
- Crankset: Shimano GRX 610 12sp: 40T
- Shifter: Shimano GRX ST-RX610, 2x lever
Brakes and Rotors
- Brakes: Shimano GRX 400 Hydraulic
- Rotors: Shimano CenterLock, 160mm
Components
- Headset: ZS44 Upper / EC44 Lower: Wolf Tooth Performance Headset – Black
- Stem: Road / Gravel: Aluminum – 90mm +/- 7 deg
- Handlebar: Lithic Corundum
- Grips / Bar Tape: Anti-Slip Gel Bar Tape – Black
- Seatpost: 6061 aluminum 27.2 x 350mm
- Saddle: WTB Silverado Medium Steel
Wheels
- Front Wheel: SUNringle G30 Expert, 12 x 100 thru-axle
- Rear Wheel: SUNringle G30 Expert, 12 x 142mm thru-axle
- Tires: Schwalbe G-One Allround
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.