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.

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