Note : Please note that specifications are subject to change without notice, based on component availability and other factors.
Introducing the Bombtrack Hook EXT. 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. Backed by Sram’s 1 x 11 Rival groupset, this provides both the gearing range and braking power needed for extreme riding. Adding more build options, this year sees the addition of an integrated rear light mount. 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.
Main features:
- The radical Hook EXT offers uprated strength and manoeuvrability.
- Sram Rival 1 1×11-speed drivetrain.
- Sram Rival hydraulic disc brakes, 160/160 mm.
- Max tire clearance: frame: 650b x 52c / 700c x 40c ; fork: 650b x 52c / 700c x 45c.
Features:
| Frame | Crmo: Columbus Cromor double butted tubing, TA, rack / fender mounts, internal light cable routing, rear light mount, 86.5 mm T47 BB shell, 650b x 52c / 700c x 45c Frame Max Tire Clearance (w/o fender) |
| Fork | Carbon: Full carbon, TA, 1.1/2” – 1.1/8”, fender / triple cage mounts, internal hub dynamo cable routing |
| Shifters | Sram Rival 1, double tap, 11-speed |
| Rear Derailleur | Sram Rival 1, clutch, long cage, 11-speed |
| Cassette | Sram PG-1130, 11-42T |
| Chain | KMC X11 EPT Anti Rust chain, 1/2” x 11/128”, 114L |
| Crankset | Bombtrack Lyer forged aluminium crank, direct mount interface (SRAM compatible), 30 mm spindle |
| Chainring | CNC machined aluminium, narrow-wide, 40T |
| Bottom Bracket | Bombtrack T47 internal sealed BB for 30 mm spindle |
| Brakes | Sram Rival, Hydr. Disc Brake, 160/160 mm, Flat Mount |
| Wheelset | Front: WTB ST Light i25 double wall, TCS 2.0, 32h / Rear: WTB ST Light i23 double wall, TCS 2.0, 32h |
| Hubs | Front: Bombtrack Tau sealed disc hub, 12 x 100 mm thru-axle / Rear: Bombtrack Tau sealed disc hub, 11-speed, 12 x 142 mm thru-axle |
| Tires | WTB Ranger, TCS Light / Fast Rolling, tubeless ready, 27.5 x 2.0” |
| Handlebar | Bombtrack CX-10 drop bar, 31.8 mm, 10° flare, 75 mm reach, 116 mm drop |
| Bar Tape | Bombtrack Escape |
| Stem | Bombtrack Roam, forged aluminum, -7° |
| Headset | Sealed external aheadset, 1.1/2” – 1.1/8”, EC34 / 28.6 | EC44 / 40 (S.H.I.S.) |
| Saddle | Bombtrack Comp |
| Seatpost | Bombtrack Yew, aluminium, 27.2 x 300 mm |
| Seatclamp | Bombtrack Origin, aluminium, 29.8 mm |
| Weight | 11.2 kg (size M) |
| Weight limit | 130 kg: the maximum system weight consists of the bike, rider and load (luggage rack or trailer) |
| Color | Matt Black |
Geometries:

| Frame Size | XS | S | M | L | XL |
| Seat Tube (mm) | 460 | 500 | 530 | 570 | 600 |
| Top Tube (mm) | 519 | 533 | 556 | 570 | 595 |
| Chain Stays (mm) | 425 | 425 | 425 | 425 | 425 |
| Head Tube Length (mm) | 110 | 130 | 150 | 170 | 190 |
| Head Tube Angle (°) | 71.5 | 71.5 | 72 | 72 | 72 |
| Seat Tube Angle (°) | 74.5 | 74.5 | 74 | 74 | 74 |
| Wheelbase (mm) | 995 | 1010 | 1025 | 1040 | 1060 |
| Stack (mm) | 554 | 573 | 589 | 608 | 627 |
| Reach (mm) | 365 | 374 | 387 | 396 | 409 |
| Handlebar Width (mm) | 400 | 420 | 420 | 440 | 440 |
| Stem Length (mm) | 80 | 80 | 90 | 100 | 100 |
| Crankarm Length (mm) | 165 | 170 | 170 | 175 | 175 |
MORE INFORMATION
| Frame | Crmo: Columbus Cromor double butted tubing, TA, rack / fender mounts, internal light cable routing, rear light mount, 86.5 mm T47 BB shell, 650b x 52c / 700c x 45c Frame Max Tire Clearance (w/o fender) |
| Fork | Carbon: Full carbon, TA, 1.1/2” – 1.1/8”, fender / triple cage mounts, internal hub dynamo cable routing |
| Shifters | Sram Rival 1, double tap, 11-speed |
| Rear Derailleur | Sram Rival 1, clutch, long cage, 11-speed |
| Cassette | Sram PG-1130, 11-42T |
| Chain | KMC X11 EPT Anti Rust chain, 1/2” x 11/128”, 114L |
| Crankset | Bombtrack Lyer forged aluminium crank, direct mount interface (SRAM compatible), 30 mm spindle |
| Chainring | CNC machined aluminium, narrow-wide, 40T |
| Bottom Bracket | Bombtrack T47 internal sealed BB for 30 mm spindle |
| Brakes | Sram Rival, Hydr. Disc Brake, 160/160 mm, Flat Mount |
| Wheelset | Front: WTB ST Light i25 double wall, TCS 2.0, 32h / Rear: WTB ST Light i23 double wall, TCS 2.0, 32h |
| Hubs | Front: Bombtrack Tau sealed disc hub, 12 x 100 mm thru-axle / Rear: Bombtrack Tau sealed disc hub, 11-speed, 12 x 142 mm thru-axle |
| Tires | WTB Ranger, TCS Light / Fast Rolling, tubeless ready, 27.5 x 2.0” |
| Handlebar | Bombtrack CX-10 drop bar, 31.8 mm, 10° flare, 75 mm reach, 116 mm drop |
| Bar Tape | Bombtrack Escape |
| Stem | Bombtrack Roam, forged aluminum, -7° |
| Headset | Sealed external aheadset, 1.1/2” – 1.1/8”, EC34 / 28.6 | EC44 / 40 (S.H.I.S.) |
| Saddle | Bombtrack Comp |
| Seatpost | Bombtrack Yew, aluminium, 27.2 x 300 mm |
| Seatclamp | Bombtrack Origin, aluminium, 29.8 mm |
| Weight | 11.2 kg (size M) |
| Weight limit | 130 kg: the maximum system weight consists of the bike, rider and load (luggage rack or trailer) |
| Color | Matt Black |
| Frame Size | XS | S | M | L | XL |
| Seat Tube (mm) | 460 | 500 | 530 | 570 | 600 |
| Top Tube (mm) | 519 | 533 | 556 | 570 | 595 |
| Chain Stays (mm) | 425 | 425 | 425 | 425 | 425 |
| Head Tube Length (mm) | 110 | 130 | 150 | 170 | 190 |
| Head Tube Angle (°) | 71.5 | 71.5 | 72 | 72 | 72 |
| Seat Tube Angle (°) | 74.5 | 74.5 | 74 | 74 | 74 |
| Wheelbase (mm) | 995 | 1010 | 1025 | 1040 | 1060 |
| Stack (mm) | 554 | 573 | 589 | 608 | 627 |
| Reach (mm) | 365 | 374 | 387 | 396 | 409 |
| Handlebar Width (mm) | 400 | 420 | 420 | 440 | 440 |
| Stem Length (mm) | 80 | 80 | 90 | 100 | 100 |
| Crankarm Length (mm) | 165 | 170 | 170 | 175 | 175 |
| Gender | Men |
| Groupset | Sram Rival 1 11S |
| collection | End of series |























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