Bombtrack Hook EXT Gravel/Adventure Bike (Matte Metallic Grey) (27.5") (XL)

Bombtrack Hook EXT Gravel/Adventure Bike (Matte Metallic Grey) (27.5") (XL)
Back Order Now
You may back order this item and it will ship when it arrives.
Price: $4,028.99 (Save 25%)
Sale: $3,021.74

Please Log in to receive a notification when this item arrives in stock.

Save In List
This item is eligible for Super Saver Shipping Learn More
This item earns up to 3022 VIP Reward Points Learn More

Some riders may live for long days out on the open road, however there are also those that know true joy comes where the pavement ends. The Bombtrack Hook EXT is designed for riders that seek out the roughest, rowdiest, back-country roads and trails that they can find. With 27.5" wheels that features wide 2" tires, the Hook handles superbly off-road closely mimicking the agility of a hardtail mountain bike while remaining insanely agile and smooth on the tarmac. Integrated rack & fender mounts precisely located over the frame, provide riders with storage solutions for longer adventures or bikepacking. Throw your leg over this beauty, but beware, we almost guarantee you'll be hook-d on it.


  • Columbus Cromor double butted frame construction with integrated rear light mount
  • Full carbon tapered fork with triple cage mounts and internally routed dynamo hub compatible
  • Sram Rival 1 groupset provides a wide range of gearing with the simplicity of a 1x system
  • Bombtrack Lyer alloy forged crankset with direct mount 40T chainring (Sram DM Compatible)
  • Flat mount hydraulic brakes provide consistent and powerful braking performance
  • WTB 27.5" wheelset with WTB Ranger tires (27.5 x 2.0")
  • Top tube bag mounts, triple cage mounts on downtube and seat tube, cage mounts under the downtube, and rear rack/fender mounts

Frame: Columbus Cromor Double Butted Tubing w/ Rack & Fender Mounts
Fork: Full Carbon w/ Triple Cage Mounts
Handlebar: Bombtrack CX-10 Drop Bar (31.8mm) (10° Flare)
Grips/Tape: Bombtrack Escape Tape
Stem: Bombtrack Raom Forged Aluminum 
Headset: Sealed External (1-1/2" - 1-1/8")
Levers: Sram Rival 1 Double Tap (Hydro) 
Shifter: Sram Rival 1 (1 x 11sp)
Brakes: Sram Rival Flat Mount Hydraulic Disc (160mm)
Crankset: Bombtrack Lyer Forged Aluminum (Sram DM) (30mm Spindle) 
BB: Bombtrack T47 (Sealed) 
Pedals: -
Chain: KMC X11 (114 Links)
Chainring: CNC Machined Aluminum (38T)
Cassette: Sram XG-1130 (11-42T)
Front Derailleur: -
Rear Derailleur: Sram Rival 1 (Long Cage) (11sp)
Front Hub: Bombtrack TAU (6-Bolt) (12 x 100mm)
Rear Hub: Bombtrack TAU (6-Bolt) (12 x 142mm) (11sp)
Rims: WTB ST Light i25 (Double Wall) (32H)
Saddle: Bombtrack Comp Saddle
Seatpost: Bombtrack Yew (27.2mm) (300mm)
Seat Clamp: Bombtrack Orgin (29.8mm)
Front Tire: WTB Ranger TCS Light (27.5 x 2.0")
Rear Tire: WTB Ranger TCS Light (27.5 x 2.0") 

*Note: These bikes are fully built by our expert bike builders, then partially disassembled as needed for shipping. Bikes will arrive to you with some basic assembly still required. 

This product was added to our catalog on June 29, 2022

Sizing Recommendations for Riders Who Fall Between Sizes:

  • Sizing down will provide a more maneuverable ride while sizing up will provide more stability
Rider Height (Feet)Rider Height (CM)
XS4'11" - 5'3"150 - 161cm
S5'3" - 5'7"160 - 171cm
M5'7" - 5'11"170 - 181cm
L5'10" - 6'3"179 - 190cm
XL6'2" - 6'6"188 - 199cm

Note: All sizing recommendations are provided by the manufacturer and may differ for each rider.



Wheel Size27.5"27.5"27.5"27.5"27.5"
Seat Tube Length460.0mm500.0mm530.0mm570.0mm600.0mm
Horizontal TT Length519.0mm533.0mm556.0mm570.0mm595.0mm
Seat Tube Angle74.5°74.5°74.0°74.0°74.0°
Head Tube Angle71.5°71.5°72.0°72.0°72.0°
Head Tube Length110.0mm130.0mm150.0mm170.0mm190.0mm
BB Drop75.0mm75.0mm70.0mm70.0mm70.0mm
Chainstay Length425.0mm425.0mm425.0mm425.0mm425.0mm
Fork Offset48.0mm48.0mm48.0mm48.0mm48.0mm
Wheelbase Length995.0mm1010.0mm1025.0mm1040.0mm1060.0mm
Standover Height748.0mm776.0mm803.0mm831.0mm855.0mm
Front Center581.0mm596.0mm610.0mm625.0mm645.0mm
Axle to Crown398.0mm398.0mm398.0mm398.0mm398.0mm


Handlebar typeDropbarDropbarDropbarDropbarDropbar
Width (Drops)400mm420mm420mm440mm440mm
Width (Bar Ends)446mm466mm466mm486mm486mm

Note: All measurements are provided by the manufacturer and may vary depending on how measurements are acquired.