Hook EXT
"...the EXT is ready for anything."
Bombtrack Hook EXT Frameset
The Hook’s hoodlum tendencies given free rein. Using a Columbus steel frame, dedicated carbon fork, and lively 27.5-inch wheels, the EXT can batter through territory out-of-bounds to other drop handlebar bikes. As capable on backcountry campouts as it is on post-work blasts, the Hook EXT remains the choice when you’re unsure of the terrain, but know you want to have fun riding it.
Frame & Fork
- Color 1: Matt black
- Color 2: Matt teal
- Color 3: Metallic sunglow fade
- Frame: Columbus Cromor double butted, TA, rack / fender mounts, internal light cable routing, rear light mount, ED coating, 85.5 mm T47 BB shell
- Fork: Seido MGV full carbon, TA, 1.1/2'' - 1.1/8'', fender / triple cage mounts, 180 mm max rotor size, lowrider rack compatible, internal hub dynamo cable routing
Parts & Accessories
- Headset: Seido Pro EC sealed external headset, 1.1/2'' - 1.1/8''
- Through axles: 12 x 100 mm / 12 x 142 mm
- Seat clamp: Bombtrack Prime 29.8 mm
Weights & Limits
- Weight frame: 2710 g frame (size L, incl. TA, hanger)
- Weight fork: 550 g fork (300 mm steerer, incl. TA)
- Maximum rider weight: 130 kg incl. Luggage
- ASTM riding condition: 2
The Hook’s hoodlum tendencies given free rein. Using a Columbus steel frame, dedicated carbon fork, and lively 27.5-inch wheels, the EXT can batter through territory out-of-bounds to other drop handlebar bikes. As capable on backcountry campouts as it is on post-work blasts, the Hook EXT remains the choice when you’re unsure of the terrain, but know you want to have fun riding it.
Frame
- BB standard: T47 - 85.5 mm shell width
- Frame max tire clearance w/o fender:
52-584 / 40-622 - Frame front derailleur compatible: yes
- Front derailleur clamp diameter: 28.6 mm
- Brake mount rear: FM 140 / 160
- Maximum rotor clearance rear: 160 mm
- Frame thickness rear brake mount: 10 mm
- Bike trailer: approved
- Seat tube mounted child seat: approved
- ISO testing standard: Road
Fork
- Fork max tire clearance w/o fender:
57-584 / 57-622 - Fork steerer inner diameter: 23.6 mm
- Headset standard (S.H.I.S.):
EC34 / 28.6 | EC44 / 40 - Brake mount front: FM 160 / 180
- Maximum rotor clearance front: 180 mm
Drivetrain
- Maximum chainring clearance 1x:
44 T with 45 mm chainline - Maximum chainring clearance 2x:
50 / 36 T with 45 mm chainline
Seats & Seatposts
- Seat post diameter: 27.2 mm
- Seat clamp diameter: 29.8 mm
Spare Parts
- Derailleur hanger: BT-DH-008
- Frame small parts: BT-CR-007 / BT-CR-006
- Through axle front: BT-TA-F-601
- Through axle rear: BT-TA-R-602
