The Kona Ouroboros ST is a 2027 gravel bike.

The Ouroboros ST brings the spirit of gravel adventure to a steel frame. Built for riders who appreciate the timeless feel of steel, it delivers a comfortable and capable ride on roads and gravel alike. The Ouroboros ST is a steel adventure gravel bike built for rough roads, singletrack, bikepacking, and long distance touring. Its resilient steel frame is paired with the mountain tested carbon Ouroboros fork, loaded with mounting points and clearance for tires up to 2.5 inches. Pack it for a week beyond the grid, strip it down for a fast ride through the woods, or build it into whatever strange machine your plans require. Gravel bike. Mountain bike. Touring rig. The categories keep circling back on themselves. With steel now in the mix, the circle is complete, but while the snake may eat its own tail, the Ouroboros ST is built to keep moving forward.

Specification

• Frame: Kona Butted Cromoly
• Fork: Kona Ouroboros Carbon
• Headset: FSA Orbit No.57E ZS44/ZS56
• Stem: Ritchey RL1 4-AXIS 31.8mm / Rise 6º / Length 48-52 50mm / 54-58 60mm
• Handlebar: Ritchey RL1 VentureMax / 24º flare / 6º back / Width 48 420mm / 50-54 440mm / 56-58 460mm
• Grips: Kona Cork Tape
• Brake Levers: Shimano GRX 610
• Brake Calipers: Shimano GRX 410
• Front Brake Rotor: Shimano RT56 180mm 6B
• Rear Brake Rotor: Shimano RT56 180mm 6B
• Shifters: Shimano GRX 610
• Rear Derailleur: Shimano GRX 822
• Cassette: Shimano Deore M6200 10-51t 12spd
• Chain: Shimano Deore M6100
• Crankset: Shimano GRX 610 38t / Length 48-50 165mm / 52-54 170mm / 56-58 172.5mm
• Bottom Bracket: Shimano BSA 68
• Rims: WTB ST i27 TCS
• Front Hub: Formula 12x100mm
• Rear Hub: Formula 12x142mm MS
• Spokes: Stainless 2.0mm Black
• Front Tire: WTB Resolute TCS Light 700x50mm
• Rear Tire: WTB Resolute TCS Light 700x50mm
• Seatpost: Kona Thumb w/Offset 31.6mm / 375mm
• Seat Clamp: Kona 34.9mm
• Saddle: WTB Gravelier Steel Fusion Form
• Paint Color: Gloss Fancy Black w/ Frost Decals