Hook EXT TI
"This agile adventure bike is the perfect companion for technical backcountry raids."
Bombtrack Hook EXT TI
£5,341.89
Hook EXT TI is made from 3Al-2.5V Titanium, the perfect material for a gravel bike. Titanium withstands fatigue like nothing else and won’t corrode. It is lightweight, and doesn’t scratch when you strap bags to it, plus it has that special responsive zing when you push hard on the pedals. Shimano’s GRX Di2 815 groupset is the ideal match, providing punchy braking and top level transmission performance through a 48 / 31T chainset and an 11 - 34T cassette. WTB EZR rims with 27.5 x 2.0’’ Ranger tyres deliver confidence through their all-terrain grip. Both Seido’s MGV fork and the Hook EXT TI frame bristle with an array of mounting options, a signature feature of our brand’s essence. Load up, just ride.
Frame & Fork
- Color: Titanium / black
- Frame: Titanium 3Al-2.5V, TA, rack / fender mounts, UDH derailleur hanger
- 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
Drivetrain & Shifting
- Shifter: Shimano GRX DI2 ST-RX815 2 x 11
- Front derailleur: Shimano GRX DI2 FD-RX815-F
- Rear derailleur: Shimano GRX DI2 RD-RX815
- Chain: KMC X11 EPT Anti Rust chain, 1/2'' x 11/128'', 112L
- Cassette: Shimano Ultegra CS HG 800, 11-speed, 11 - 34 T
- Crankset: Shimano GRX 810-2, hollow forged aluminium crank, 24 mm spindle
- Chainring: Shimano GRX, 48 T / 31 T
- Bottom bracket: Bombtrack T47 internal sealed BB for 24 mm spindle
Wheels & Tires
- Front hub: Bombtrack Tau sealed hub, 6-bolt disc
- Rear hub: Bombtrack Tau sealed hub, 11-speed HG body, 6-bolt disc
- Through axles: 12 x 100 mm / 12 x 142 mm
- Front rim: WTB EZR i25 , TCS 2.0, 32h
- Rear rim: WTB EZR i23 , TCS 2.0, 32h
- Front tire: WTB Ranger TCS Light / Fast Rolling 27.5'' x 2.0'', tubeless ready
- Rear tire: WTB Ranger TCS Light / Fast Rolling 27.5'' x 2.0'', tubeless ready
Cockpit
- Handlebar: Seido Tackle drop bar, 31.8 mm, 25° flare
- Grips: Bombtrack Escape bar tape
- Stem: Seido Chase forged aluminium stem, 0°
- Headset: Sealed external aheadset, 1.1/2'' - 1.1/8''
Seats & Seatpost
- Seat: Bombtrack Dart seat
- Seat post: Bombtrack Yew aluminium seatpost, 27.2 mm x 300 mm
- Seat clamp: Bombtrack Prime 31.8 mm
Brakes
- Brake levers: Shimano GRX DI2 ST-RX815 hydraulic
- Brakes: Shimano GRX BR-RX810 flat mount hydraulic disc brakes
- Rotors: Shimano SM-RT86 180 mm front and 160 mm rear rotor
Weight & Limits
- Complete weight: 10.8 kg (size M)
- Weight frame: 2060 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
Accessories
- Charger: Shimano SM-BCR2 charger
Frame
- BB standard: T47 - 86.5 mm shell width
- Frame max tire clearance w/o fender:
52-584 / 40-622 - Frame front derailleur compatible: yes
- Front derailleur clamp diameter: 31.8 mm
- Brake mount rear: FM 140 / 160
- Maximum rotor clearance rear: 160 mm
- Frame thickness rear brake mount: 25 mm
- Bike trailer: approved
- Seat tube mounted child seat: not 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 - Headset crown race angle: 45°
- 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 - Crankarm:
XS - M 170 mm
L - XL 175 mm - Q Factor: 151 mm
- BCD crank: 110 mm / 80 mm, asymmetric Shimano 4 bolts
- Chainring offset: 0 mm
- Chainline: 46.9 mm
Seat & Seatpost
- Seat post diameter: 27.2 mm
- Seat post offset: 0 mm
- Seat post length: 300 mm
- Seat clamp diameter: 31.8 mm
Cockpit
- Stem length:
XS - M 45 mm
L - XL 60 mm - Stem angle: 0°
- Headset spacers: 1 x 10 mm, 2 x 5 mm
Wheels
- Spoke length front wheel:
274 mm, 275 mm - Spoke length rear wheel:
273 mm, 275 mm - Spoke count (front / rear): 32 / 32
- Front through axle:
12 mm x 100 mm, 1.5 thread pitch - Rear through axle:
12 mm x 142 mm, 1.0 thread pitch - ERD: 570 mm
- Front hub PCD: 58 mm
- Rear hub PCD: 58 mm
- Front hub flange distance / offset:
56.5 mm center to center / 6.6 mm - Rear hub flange distance / offset:
51 mm center to center / 8.8 mm
Spare Parts
- Derailleur hanger: Sram UDH
- Frame small parts: BT-CR-016
- Hub end caps front: BT-HC-014
- Hub end caps rear: BT-HC-017
- Cassette body: BT-CB-006
- Through axle front: BT-TA-F-601
- Through axle rear: BT-TA-R-605
