Kona Ouroboros ST

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. SPECS & GEOMETRY SPECIFICATIONS FRAME Kona Butted Cromoly SIZES 48, 50, 52, 54, 56, 58 REAR SHOCK n/a FORK Kona Ouroboros Carbon CRANKSET Shimano GRX 610 38t / Length 48-50 165mm / 52-54 170mm / 56-58 172.5mm BOTTOM BRACKET Shimano BSA 68 PEDALS n/a CHAIN Shimano Deore M6100 CASSETTE Shimano Deore M6200 10-51t 12spd CHAINGUIDE n/a FRONT DERAILLEUR n/a REAR DERAILLEUR Shimano GRX 822 SHIFTERS Shimano GRX 610 BRAKE CALIPERS Shimano GRX 410 FRONT BRAKE ROTOR Shimano RT56 180mm 6B REAR BRAKE ROTOR Shimano RT56 180mm 6B BRAKE LEVERS Shimano GRX 610 HEADSET FSA Orbit No.57E ZS44/ZS56 HANDLEBAR Ritchey RL1 VentureMax / 24º flare / 6º back / Width 48 420mm / 50-54 440mm / 56-58 460mm STEM Ritchey RL1 4-AXIS 31.8mm / Rise 6º / Length 48-52 50mm / 54-58 60mm SEATPOST Kona Thumb w/Offset 31.6mm / 375mm SEAT CLAMP Kona 34.9mm GRIPS Kona Cork Tape SADDLE WTB Gravelier Steel Fusion Form FRONT HUB Formula 12x100mm REAR HUB Formula 12x142mm MS SPOKES Stainless 2.0mm Black RIMS WTB ST i27 TCS FRONT TIRE WTB Resolute TCS Light 700x50mm REAR TIRE WTB Resolute TCS Light 700x50mm PAINT COLOR Gloss Fancy Black w/ Frost Decals All specifications are subject to change without notice. Prerelease products may be displayed as graphic representations. GEOMETRY Size 48 50 52 54 56 58 1 ST Length 410 410 455 455 500 535 2 TT Length 530 544 560 575 593 613 3 Reach 380 385 390 395 400 405 4 Stack 560 574 592 608 632 660 5 Standover 715 722 757 765 803 836 6 HT Angle 69.5 69.5 69.5 69.5 69.5 69.5 7 HT Length 115 130 150 170 195 225 8 ST Angle 75 74.5 74 73.5 73 72.5 9 CS Length 445 445 445 445 445 445 10 BB Drop 75 75 75 72 72 72 11 BB Height 293 293 293 296 296 296 12 Wheelbase 1059 1069 1091 1093 1107 1123 13 Front Center 624 635 647 658 672 687 14 Fork Length 420 420 420 420 420 420 15 Fork Offset 55 55 55 55 55 55