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Otso Warakin Stainless

Otso Warakin Stainless
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Our original all-road bike. The Warakin Stainless was one of the first bikes we built when we created Otso in 2016. It's been such a hit over the years that we haven't changed the geometry one bit. Stainless steel has a ride quality that is familiar, yet surprising-smooth like steel, lively like titanium. The Warakin Stainless is ready for your next century, three-day bikepacking trip, or afternoon group ride.

The supple and smooth ride quality of steel meets the corrosion resistance and lively feel of titanium. Stainless steel is lighter than you think, loads of fun, and ready for your next full day on the saddle. It's a frame material that is as unique and seldom used as it is versatile and excellent for multiple types of riding.

700c? Check! 650b? Double check! 29er? Triple check! Warakin Stainless has massive tire clearance because no two roads are the same. The Warakin Stainless has clearance for 700c x 51mm, 650b x 51mm, or 29" x 2.1" tires. Race gravel with 700c x 38mm semi-slicks, then swap in 29" x 2.1" for that bikepacking trip with gnarly trails without needing to ride a different bike.

The Tuning Chip rear dropout system allows for adjustable bike geometry by changing the wheelbase by up to 20mm, bottom bracket height by up to 4mm, and head tube angle by 0.2º. This means you can easily switch between a bike with the responsive, agile handling of a shorter wheelbase and a bike with the confidence and stability of a longer wheelbase just by flipping the Tuning Chip. Use the back position for stability and confidence with its longer wheelbase, lower bottom bracket, and slack head tube angle. The front position is ideal for winding singletrack or the CX course with its shorter wheelbase, higher bottom bracket, and steeper head tube angle. The center position is the best of both worlds.

Unparalleled ride quality results from the combination of stainless steel and carefully thought out frame geometry. The Warakin Stainless was designed by our engineers in Minnesota and manufactured by top steel frame fabricators in Taiwan.

Warakin's progressive geometry takes a page from the cross-country MTB playbook. Increased top tube length and a shorter stem maintain stack and reach while providing a lively 'can-do' attitude on rougher terrain.

A small port near the bottom of the seat tube allows for the cable routing of a dropper post. If you don't ride with a dropper, you probably won't even notice the port.

Numerous frame braze-ons allow Warakin to accommodate cable routing clamps, three water bottles, fenders, racks, frame bags, and more. Three braze-ons on either side of the fork allow for additional storage.

Geo Chart

Geometry Chart:
Recommended Rider Height 5' 2" - 5' 7" 5' 6" - 5' 11" 5' 10" - 6' 3" 6' 2" - 6' 6"
Effective top tube (mm) 546 560 583 605
Nominal head tube angle 71° 71.5° 71.5° 71.5°
Tuning Chip induced head/seat tube angle change ±0.2° ±0.2° ±0.2° ±0.2°
Head tube length (mm) 94 107 149 191
Nominal seat tube angle 72.5° 72.5° 72.5° 72.5°
Seat tube length (mm) 475 510 540 570
Bottom bracket drop (mm) 68 - 72 68 - 72 68 - 72 68 - 72
Chainstay length (mm) 420 - 440 420 - 440 420 - 440 420 - 440
Wheelbase (mm) 1008 - 1028 1015 - 1035 1039 - 1059 1062 - 1082
Trail (mm) 71 68 68 68
Fork offset (mm) 47 47 47 47
Rigid fork axle to crown length (mm) 420 420 420 420
Stack (mm) 540 555 595 635
Reach (mm) 375 395 395 405
Standover (mm) 737 764 796 830


Frame Warakin custom butted austenitic stainless steel frame
Fork Lithic Hiili carbon fork with triple mounts, 12mm thru-axle
Wheels SUNringle G30 Expert 700C 25mm
Axles Wolf Tooth
Tires Panaracer GravelKing SK 700x38 Black
Bottom Bracket Shimano english thread BSA, Ø68mm
Crankset Shimano GRX 600
Chainrings 46/30T
Shifters Shimano GRX 600 mechanical, 11 speed
Front Derailleur Shimano GRX, braze-on mount
Rear Derailleur Shimano GRX 810, 11 speed
Cassette/Freewheel Shimano HG700, 11-34t, 11 speed
Chain Shimano HG-11X
Brakes Shimano GRX 600 Hydraulic
Handlebars Lithic Corundum aluminum compact drop with 16° flare
Tape/Grips Wolf Tooth Supple Lite Bar Tape
Stem Aluminum
Headset Wolf Tooth Performance Headset, ZS44/EC44
Seatpost Aluminum, 27.2mm
Saddle WTB Volt Medium, 142mm width
Pedals Sold Separately

* Subject to change without notice.