Bombtrack just unveiled their 2021 Hook lineup. Here’s an exclusive look at the three models, including the venerable Hook EXT. Find all the build details, photos, specs, and a nice overview video of each here…

Posted by Logan Watts

Photos by Jason Sellers

Bombtrack just released its 2021 Hook lineup. Instead of having multiple complete models delineated by numbers and suffixes, there are just three bikes within the gravel-adventure range: the base model Hook, the Hook EXT, and the carbon Hook EXT C. Each get a few frame tweaks, new colors, and refined build kits. Here are the details on each.

2021 Bombtrack Hook

Fitted with 700C x 40mm or 650B x 42mm tires, the versatile steel base model Hook still has plenty of mounts for gear options on the frame, including direct mounts for a top tube bag, three sets of triple cage mounts, and rack and fender mounts. Also, the Hook’s full carbon fork has two additional sets of three-pack bosses for further cargo duties.

New for 2021, the Hook specced in size-matched 650b (XS and S) or 700c wheels to standardize the bike’s geometry. In addition, it gets a revised Columbus Cromor double butted frame with a new head tube and 86.5mm wide T47 bottom bracket to increase tire clearance. Find the frame specs below and scroll down for the build kit.

2021 Bombtrack Hook
  • 2021 Bombtrack Hook
  • 2021 Bombtrack Hook
  • BB Standard: T47 – 86.5mm shell width
  • Headset Standard (S.H.I.S.): EC34 / 28.6 | EC44 / 40
  • Fork Max Tire Clearance: XS-S 650B x 52mm / M-XL 700C x 45mm
  • Frame Max Tire Clearance: XS-S 650B x 42mm / M-XL 700C x 42mm
  • Maximum chainring clearance 1x: 40T with 45mm chainline
  • Maximum chainring clearance 2x: 48/32T with 46.9mm chainline
  • Seat Post Diameter: 27.2mm
  • Brake mount front/rear: Flat Mount
  • Maximum rotor clearance front/rear: 160mm
  • Front through axle: 12mm x 100mm
  • Rear through axle: 12mm x 142mm
  • Crankarm Length: XS-S 165mm / M 170mm / L-XL 175mm
  • Spoke count (front/rear): 32 / 32
  • Handlebar Width (drops): XS-S 400mm / M 420mm / L-XL 440mm
  • Stem Length: XS-S 80mm / M 90mm / L-XL 100mm
  • Stem angle: -7°
  • 2021 Bombtrack Hook
  • 2021 Bombtrack Hook
  • 2021 Bombtrack Hook

2021 Bombtrack Hook Build Kit

The Hook gets a completely new build kit for 2021, featuring a GRX 2×10 group and a Bombtrack Lyer 30mm alloy crank with a direct mount 2x spider. With 32/48t subcompact chainrings and 11-36t cassette, the new drivetrain offers a 491% gear range. Here’s the full build kit:

  • Color Glossy Metallic Blue
  • Frame COLUMBUS CROMOR double butted, TA dropout, rack / fender mounts, 86.5mm T47 BB shell
  • Fork Full carbon, TA, 1.1/2″ – 1.1/8″, fender / triple cage mounts
  • Handlebar BOMBTRACK CX-10 drop bar, 31.8mm, 10° flare
  • Grips BOMBTRACK COMMAND bar tape
  • Stem BOMBTRACK ROAM forged aluminium stem, -7°
  • Headset Sealed external aheadset, 1.1/2″ – 1.1/8″
  • Levers SHIMANO GRX ST-RX400 STI Hydraulic
  • Shifter SHIMANO GRX ST-RX400 STI 2 x 10
  • Brakes SHIMANO GRX BR-RX400 hydraulic disc brakes with 160mm rotors
  • Crankset BOMBTRACK LYER forged aluminium crank, SRAM direct mount, 30mm spindle
  • BB BOMBTRACK T47 internal sealed BB for 30mm spindle
  • Chain KMC X10 EPT Anti Rust chain, 1/2″ x 11/128″, XS – S 112L, M – XL 114L
  • Chainring aluminium, subcompact, 48 / 32 T, direct mount spider
  • Cassette SHIMANO CS-HG50 10-speed cassette, 11 – 36 T
  • Front derailleur SHIMANO GRX FD-RX400
  • Rear derailleur SHIMANO GRX RD-RX400, clutch
  • Front hub BOMBTRACK TAU sealed disc hub, 12 x 100mm thru-axle
  • Rear hub BOMBTRACK TAU sealed disc hub, 11-speed, 12 x 142mm thru-axle
  • Rims front/rear WTB ST i19 double wall, TCS 2.0, 32h
  • Saddle BOMBTRACK COMP saddle
  • Seat post BOMBTRACK BEECH aluminium seatpost, 27.2mm x 300mm
  • Seat clamp BOMBTRACK ORIGIN forged aluminium seat clamp, 29.8mm
  • Front tire XS-S 650B WTB RESOLUTE 42-584 / M-XL 700C WTB VENTURE 40-622, tubeless ready
  • Rear tire XS-S 650B WTB RESOLUTE 42-584 / M-XL 700C WTB VENTURE 40-622, tubeless ready
  • Weight (size M) 11.0 kg
  • Maximum rider weight incl. luggage 120 kg
  • 2021 Bombtrack Hook
  • 2021 Bombtrack Hook
  • 2021 Bombtrack Hook

The 2021 Bombtrack Hook is available in Glossy Metallic Blue at Bombtrack dealers for 2,599.99 USD / 2299,99 EUR / 3.199,99 CAD / 2.200,00 GBP / 278,000 ¥ / 3.500,00 AUD. Currently, the Hook is not yet available as frameset only option. Stay tuned for more details.

2021 Bombtrack Hook EXT

With a quality Colombus Cromor frame, a high-end carbon fork, loads of mounting options, and dirt-focused 27.5 x 2.0″ tires, the Hook EXT grabbed a slot in our Gear of The Year awards last year. The 2021 model stays relatively the same with the addition of a revised head tube (40g lighter), a rear light mount, and integrated rear light cable routing. They also added the version 2 model of the full-carbon EXT fork with triple cage mounts and internal dynamo cable routing into the steerer. Find the frame specs below and scroll down for the build kit.

2021 Bombtrack Hook EXT
  • 2021 Bombtrack Hook EXT
  • 2021 Bombtrack Hook EXT
  • BB Standard: T47 – 86.5mm shell width
  • Headset Standard (S.H.I.S.): EC34 / 28.6 | EC44 / 40
  • Fork Max Tire Clearance w/o fender: 650B x 52mm / 700C x 45mm
  • Frame Max Tire Clearance w/o fender: 650B x 52mm / 700C x 40mm
  • Maximum chainring clearance 1x: 44T with 45mm chainline
  • Maximum chainring clearance 2x: 50/36 T with 45mm chainline
  • Seat Post Diameter: 27.2mm
  • Brake mount front/rear: Flat Mount
  • Maximum rotor clearance front/rear: 160mm
  • Front through axle: 12mm x 100mm
  • Rear through axle: 12mm x 142mm
  • Crankarm Length: XS 165mm / S-M 170mm / L-XL 175mm
  • Spoke count (front/rear): 32/32
  • Handlebar Width (drops): XS 400mm / S-M 420mm / L-XL 440mm
  • Stem Length: XS-S 80mm / M 90mm / L-XL 100mm
  • Stem angle: -7°
  • 2021 Bombtrack Hook EXT
  • 2021 Bombtrack Hook EXT
  • 2021 Bombtrack Hook EXT

2021 Bombtrack Hook EXT Build Kit

Carried over from last year, the 2020 Bombtrack Hook EXT gets a SRAM 1×11 Rival groupset. Build kit tweaks include a KMC X11 EPT Anti Rust Chain and wider 25mm IW rims for improved tire performance. Here’s the full build kit.

  • Color 1 Matte Black
  • Color 2 Matte Metallic Grey Blue
  • Frame COLUMBUS CROMOR double butted tubing, TA, rack/fender mounts, 86.5mm T47 BB shell
  • Fork Full carbon, TA, 1.1/2″-1.1/8″, fender/triple cage mounts, internal dynamo cable routing
  • Handlebar BOMBTRACK CX-10 drop bar, 31.8mm, 10° flare
  • Grips BOMBTRACK ESCAPE bar tape
  • Stem BOMBTRACK ROAM forged aluminium stem, -7°
  • Headset Sealed external aheadset, 1.1/2-1.1/8″
  • Levers SRAM RIVAL 1 double tap hydraulic
  • Shifter SRAM RIVAL 1 double tap 1×11
  • Brakes SRAM RIVAL flat mount hydraulic disc brakes with 160mm rotors
  • Crankset BOMBTRACK LYER forged aluminium crank, SRAM direct mount, 30mm spindle
  • BB BOMBTRACK T47 internal sealed BB for 30mm spindle
  • Chain KMC X11 EPT Anti Rust chain, 1/2″ x 11/128″, 114L
  • Chainring CNC machined aluminium, narrow-wide, 40T
  • Cassette SRAM PG-1130 11-speed cassette, 11-42T
  • Rear derailleur SRAM RIVAL 1, clutch, long cage
  • Front hub BOMBTRACK TAU sealed disc hub, 12 x 100mm thru-axle
  • Rear hub BOMBTRACK TAU sealed disc hub, 11-speed, 12 x 142mm thru-axle
  • Rims front/rear WTB ST Light i25 double wall, TCS 2.0, 32h
  • Saddle BOMBTRACK COMP saddle
  • Seat post BOMBTRACK YEW aluminium seatpost, 27.2mm x 300mm
  • Seat clamp BOMBTRACK ORIGIN forged aluminium seat clamp, 29.8mm
  • 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
  • Weight (size M) 11.2 kg
  • Maximum rider weight incl. luggage 130kg
  • 2021 Bombtrack Hook EXT
  • 2021 Bombtrack Hook EXT
  • 2021 Bombtrack Hook EXT

The 2021 Bombtrack Hook EXT is available in two colors: Matte Black or the Matte Metallic Gray Blue shown here. While a frameset only option is not yet available, you can get the complete for 2,999.99 USD / 2.499,99 EUR / 298,000 ¥ / 2.400,00 GBP / 3.599,99 CAD / 3.900,00 AUD. Stay tuned for more details and be sure to check out Cass’ review of the Hook EXT here.

2021 Bombtrack Hook EXT C

For 2021, the carbon fiber Hook EXT C gets a new frame and fork with a tapered head tube, thru-axles, rack and fender mounts, stealth dropper post routing, and a T47 bottom bracket. Along with some minimal changes to the geometry, Bombtrack revised the stays and yoke for added chainring clearance. They also added the version 2 model of the full-carbon EXT fork with triple cage mounts and internal dynamo cable routing into the steerer.

Geometry tweaks to the frame include a 5mm longer top tube, 2mm of additional fork offset, and a very slightly longer reach and taller stack. Find the frame specs below and scroll down for the build kit.

2021 Bombtrack Hook EXT C
  • 2021 Bombtrack Hook EXT C
  • 2021 Bombtrack Hook EXT C
  • BB Standard: T47 – 68mm shell width
  • Headset Standard (S.H.I.S.): IS42 / 28.6 | IS52 / 40
  • Fork Max Tire Clearance: 650B x 52mm / 700C x 45mm
  • Frame Max Tire Clearance: 650B x 52mm / 700C x 45mm
  • Maximum chainring clearance 1x: 46T with 45mm chainline
  • Maximum chainring clearance 2x: 50/34T with 43.5mm chainline
  • Seat Post Diameter: 27.2mm
  • Brake mount front/rear: Flat Mount
  • Maximum rotor clearance front/rear: 160mm
  • Front through axle: 12mm x 100mm
  • Rear through axle: 12mm x 142mm
  • Crankarm Length: XS 165mm / S-M 170mm / L-XL 175mm
  • Spoke count (front/rear): 28/28
  • Handlebar Width (drops): XS 400mm / S-M 420mm / L-XL 440mm
  • Stem Length: XS-S 80mm / M 90mm / L-XL 100mm
  • Stem angle: -7°
  • 2021 Bombtrack Hook EXT C
  • 2021 Bombtrack Hook EXT C
  • 2021 Bombtrack Hook EXT C

2021 Bombtrack Hook Build Kit

The 2021 Bombtrack Hook EXT C also gets an updated build kit. Highlights include a Rival 1 derailleur, shifter, and flat mount brakes, with a SRAM direct mount crankset, HD hub driver, and 10-42T cassette. The build also comes with a Hunt Adventure Sport 650B wheelset with 25mm internal width rims and tan wall 27.5 x 2.0″ WTB Venture tires. Here’s the full build kit.

  • Color Glossy Dark Green
  • Frame TORAY T700 / T800 Hi-Mod carbon, TA, rack / fender mounts, 68mm T47 BB shell
  • Fork Full carbon, TA, 1.1/2″-1.1/8″, fender/triple cage mounts, internal dynamo cable routing
  • Handlebar BOMBTRACK CX-10 drop bar, 31.8mm, 10° flare
  • Grips BOMBTRACK ESCAPE bar tape
  • Stem BOMBTRACK ROAM forged aluminium stem, -7°
  • Headset Sealed integrated aheadset, 1.1/2″-1.1/8″
  • Levers SRAM RIVAL 1 double tap hydraulic
  • Shifter SRAM RIVAL 1 double tap 1 x 11
  • Brakes SRAM RIVAL flat mount hydraulic disc brakes with 160 rotors
  • Crankset BOMBTRACK LYER forged aluminium crank, SRAM direct mount, 30mm spindle
  • BB BOMBTRACK T47 external sealed BB for 30mm spindle
  • Chain KMC X11 EPT Anti Rust chain, 1/2″ x 11/128″, 114L
  • Chainring CNC machined aluminium, narrow-wide, 38 T
  • Cassette SRAM XG-1150 11-speed cassette, 10-42T
  • Rear derailleur SRAM RIVAL 1, clutch, long cage
  • Front hub HUNT ADVENTURE SPORT sealed hub, 6-bolt disc, 12 x 100mm thru-axle
  • Rear hub HUNT ADVENTURE SPORT sealed, 11-speed, 6-bolt disc, 12 x 142mm thru-axle, XD
  • Rims front/rear HUNT ADVENTURE SPORT double wall asymmetric rim, TLC, i25, 28h
  • Saddle BOMBTRACK COMP saddle
  • Seat post BOMBTRACK YEW aluminium seatpost, 27.2mm x 300mm
  • Seat clamp BOMBTRACK PRIME forged aluminium seat clamp, 31.8mm
  • Front tire WTB VENTURE TCS LIGHT 27.5 x 2.0″, tubeless ready
  • Rear tire WTB VENTURE TCS LIGHT 27.5 x 2.0″, tubeless ready
  • Weight (size M) 9.4 kg
  • Maximum rider weight (incl. luggage) 115 kg
  • 2021 Bombtrack Hook EXT C
  • 2021 Bombtrack Hook EXT C
  • 2021 Bombtrack Hook EXT C

The 2021 Bombtrack Hook EXT C is available in Glossy Dark Green for 3,849.99 USD / 3,199,99 EUR / 398,000 ¥ / 3,100 GBP / 4,499,99 CAD / 4.750,00 AUD. The frameset only option is not yet available. These bikes aren’t yet published, so stay tuned for Bombtrack’s catalogue to be published later this week.

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