Naturally, our steel Hook is something special, being built from double-butted Columbus Cromor tubing, with a tapered headtube and a T47 bottom bracket. A Shimano GRX groupset with a subcompact 46 / 30T crankset, combined with an 11 – 36 T cassette helps to keep you spinning up and over the hills, and GRX 400 callipers deliver powerful braking on the descents. The frameset is bedecked with mounts for every scenario, including a top tube bag, triple cage mounts and bottle mount options, as well as internal dynamo routing on the full carbon fork. Build Kit: Frame: Columbus Cromor double butted, TA dropout, rack / fender mounts, 86.5 mm T47 BB shell Fork: Seido RGT full carbon, TA, 1.1/2'' - 1.1/8'', fender / triple cage mounts, 180 mm max rotor size, internal hub dynamo cable routing Levers: Shimano GRX ST-RX400 STI Hydraulic Shifter: Shimano GRX ST-RX400 STI 2 x 10 Brakes: Shimano GRX BR-RX400 hydraulic disc brakes Crankset: Shimano GRX FC-RX600-10, 24 mm spindle Bottom Bracket: Bombtrack T47 internal sealed BB for 24 mm spindle Cassette: Shimano CS-HG50 10-speed, 11 - 36 T Rear deraileur: Shimano GRX RD-RX400, clutch Hubs: Seido Tau sealed hub, 11-speed, 6-bolt disc Rims: WTB ST i19 double wall, TCS 2.0, 32h Tires: WTB Venture 40-622, tubeless ready Weight: 11 kg