The Bombtrack Hook GRX is designed as a versatile gravel and endurance bike for professional builds and long-distance adventures. Its Columbus Cromor double-butted steel frame offers the ideal combination of stiffness, comfort, and resilience, paired with a full carbon fork for precise steering and reduced weight.

Equipped with a Shimano GRX 2x10 hydraulic drivetrain, reliable WTB TCS 2.0 rims, and WTB tubeless-ready tyres, the Hook GRX ensures confident performance across all terrains — from daily commutes to multi-day tours. Rack and mudguard mounts, internal dynamo routing, and a T47 bottom bracket make it perfectly suited for both adventure and all-weather use.

Technical Specifications

• Colours: Metallic Black / Metallic Red / Metallic Teal–Black Fade
• Frame: Columbus Cromor double-butted steel, TA dropouts, rack & mudguard mounts, 86.5 mm T47 BB shell
• Fork: Full carbon, TA, 1.1/2"–1.1/8", triple cage mounts, internal hub dynamo routing
• Handlebar: Bombtrack CX-10 drop bar, 31.8 mm, 10° flare
• Grips: Bombtrack Escape bar tape
• Stem: Bombtrack Roam forged aluminium, -7°
• Headset: Sealed external aheadset, 1.1/2"–1.1/8"
• Levers / Shifters: Shimano GRX ST-RX400 STI hydraulic, 2×10
• Brakes: Shimano GRX BR-RX400 hydraulic disc brakes
• Rotors: Shimano SM-RT66, 160 mm
• Crankset: Shimano GRX FC-RX600-10, 46/30T, 24 mm spindle
• Bottom Bracket: Bombtrack T47 internal sealed BB for 24 mm spindle
• Chain: KMC X10 EPT Anti Rust, 1/2" x 11/128"
• Cassette: Shimano CS-HG50 10-speed, 11–36T
• Front Derailleur: Shimano GRX FD-RX400-F
• Rear Derailleur: Shimano GRX RD-RX400 (clutch)
• Front Hub: Bombtrack Tau sealed hub, 6-bolt disc
• Rear Hub: Bombtrack Tau sealed hub, 11-speed, 6-bolt disc
• Through Axles: 12×100 mm (front) / 12×142 mm (rear)
• Rims: WTB ST i19 TCS 2.0, double wall, 32h (front & rear)
• Tyres:
  • XS–S: WTB Resolute 650B × 42C (tubeless ready)
  • M–XL: WTB Venture 700C × 40C (tubeless ready)
• Saddle: Seido Comp
• Seatpost: Bombtrack Beech 27.2 mm (XL: 415 mm / XS–L: 315 mm)
• Seat Clamp: Bombtrack Origin 29.8 mm
• Rack / Mudguard / Lights / Kickstand: Not included (mounts provided)
• Weight (complete): 11.1 kg (size M)
• Weight (frameset): 2420 g frame / 600 g fork (size M, incl. TA & hanger)
• Maximum Rider Weight: 120 kg (incl. luggage)
• ASTM Classification: Category 2 (Gravel / Endurance / Touring)