Bombtrack Hook EXT

So what does the EXT stand for? The important thing, is what the Hook EXT is. Built on a 27.5” rim and using a wider tire produces a wheel with the same outer diameter as a typical 700x28c. This means it’s possible to run bigger knobby mountain bike tires, with all the grip they offer, yet retain the geometry of a CX/gravel bike, something gravel racers have long dreamed of. This is made possible thanks to a specially designed frame that utilizes a wider bottom bracket and yoke to maintain a wide yet short rear end. The Columbus Cromor double-butted tubing has the perfect blend of being lightweight yet durable, perfect for gravel riding. The fork was then developed specifically for this bike, with a super wide crown offering massive tire clearance and a stiffer tapered steerer tube for more accurate handling.

The SRAM Rival 1 is ideally suited to the Hook EXT, thanks to its simplified 1x design with clutch derailleur, wide range cassette and X-sync chainring providing smooth shifting in any conditions. The hydraulic brakes bring a superior stopping power to the EXT, which is reassuring on steeper technical descents. The versatile build is designed to offer as much all-round use as possible, so if your journey is mainly on-road, swap out the wheels for a set of 700c’s, with anything up to 45c tire.

NOTE: bikes are not on stock, but delivered in aprox. 10days


  • COLOR: metallic grey
  • FRAME: COLUMBUS “Cromor” double butted tubing,TA dropout, repl. hanger, rack & fender mounts
  • FORK: BT BIKES “CX-Plus” carbon / alloy TA disc fork, 1.1/8″-1.1/2″ tapered steerer tube
  • BARS: BT BIKES “CX-10” 6061-T6 butted alloy, 10° flaired drop bar
  • GRIPS: BT BIKES “PRO” shock-proof bar tape
  • STEM: BT BIKES “Origin” forged alloy stem, -7°
  • HEADSET: FSA “Orbit ITA” sealed a-headset, tapered 1.1/8″-1.1/2″
  • LEVER: SRAM “Rival 1” hydraulic
  • SHIFTER: SRAM “Rival 1” 1×11 (integ. with lever)
  • BRAKES: SRAM “Rival” flat mount hydraulic with 160mm F / 140mm R rotors
  • CRANKSET: SRAM “Rival 1” BB: FSA 386EVO
  • PEDALS: not included
  • CHAIN: KMC “X11-1”
  • CHAINRING: SRAM “X-SYNC” alloy, 44t
  • CASSETTE: SRAM 11-speed cassette, 11-36
  • DERAILLEUR: SRAM “Rival 1”
  • FRONT HUB: BT BIKES “Origin” sealed, CL disc hub, 15x100mm Thru-axle
  • REAR HUB: BT BIKES “Origin” sealed, cassette CL disc hub, 12x142mm Thru-axle
  • FRONT RIM: WTB “STS” double wall sleeved, TLC, i19, 32h
  • REAR RIM: WTB “STS” double wall sleeved, TLC, i19, 32h
  • SADDLE: SELLE SAN MARCO “Squadra-Startup” saddle
  • SEAT POST: BT BIKES ‘612’ alloy seat post
  • SEAT CLAMP: BT BIKES “Origin” forged alloy seat clamp
  • TIRES: WTB “Nano” 27.5″ x 2.1″
  • WEIGHT: 11.1kg (24.5lbs) – size M
2399.99 EUR