the Hook EXT

...takes 'road-plus' further off the beaten track and sets the benchmark for a steel gravel bike.

"More efficient than a mountain bike, more rugged than the typical gravel bike, the Hook EXT is spectacular fun. Bombtrack has somehow created a bike this is both nimble and playful as well as stable and a safe pair of hands on quick descents. It spans genres, while managing to be really damn good at each, rather than the classic “Jack of all trades”. "

Introducing the Hook EXT

Smaller wheels, bigger tyres, rowdier personality. The burly Hook EXT is made for the most extreme drop bar adventures. A classic case of "if it ain't broke – don't fix it!". Besides adding a wider, more durable T47 bottom bracket we've revised the cable routing to keep the bike looking clean with any combination of derailleurs and dropper posts. Besides this, the bike retains the same gorgeous matt metallic grey paint scheme and awesome parts list that’s made it a pin-up for many gravel nerds. 


Frame with Bombtrack casted drive-side yoke, T47 bottom bracket, extra cage mount under down tube, direct mount top tube ‘fuel’ bag and stealth dropper post routing.

Columbus Cromor, double butted front triangle chosen for its lightweight yet durable properties ideal for CX and gravel rides.

Straight blade extra wide full carbon fork with triple cage mounts and 12mm thru-axle.

FSA GOSSAMER alloy crank with 40T narrow-wide chainring, 11 - 42t cassette and Rival-1 11-speed derailleur,Rival hydraulic brakes.

WTB ST - i21 TCS rims with WTB Nano 2.1” Race folding tires.


    WHEEL SIZE 27.5''
    COLOR 1 Matt Grey
    COLOR 2 -
    FRAME COLUMBUS CROMOR double butted tubing, TA dropout, replaceable hanger, rack / fender mounts, 86 mm T47 shell
    FORK BOMBTRACK EXT full carbon disc fork, TA, 1.1/2'' - 1.1/8'' tapered steerer, with fender / triple cage mounts
    HEADSET FSA NO.21/12/44 sealed external aheadset, 1.1/2'' - 1.1/8''
    BB FSA T47 BB for T47 x 86,5 mm 



    HANDLEBAR BOMBTRACK CX-10 drop bar, 31.8 mm, 10° flare
    STEM BOMBTRACK ROAM forged alloy stem, -7°
    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 mm rotors
    PEDALS -
    CHAIN KMC X11 chain, 1/2'' x 11/128'', 114L
    CHAINRING FSA GOSSAMER alloy, narrow-wide, 40 T, 1/2'' x 11/128''
    CASSETTE SRAM PG-1130 11-speed cassette, 11 - 42 T
    REAR DERAILLEUR SRAM RIVAL 1 rear derailleur, long cage
    FRONT HUB BOMBTRACK ORIGIN sealed disc hub, 12 x 100 mm thru-axle
    REAR HUB BOMBTRACK ORIGIN sealed disc hub, 11-speed, 12 x 142 mm thru-axle
    FRONT RIM WTB ST i21 double wall, TCS 2.0, 32h
    REAR RIM WTB ST i21 double wall, TCS 2.0, 32h
    SEAT POST BOMBTRACK PINE alloy seatpost, 27.2 mm x 300 mm
    SEAT CLAMP BOMBTRACK ORIGIN forged alloy seatclamp, 29.8 mm
    FRONT TIRE WTB NANO RACE folding tire, 27.5'' x 2.1''
    REAR TIRE WTB NANO RACE folding tire, 27.5'' x 2.1''
    RACK -
    LIGHTS -
    WEIGHT 11 kg (size M)

    Bike Size S M L XL
    Seat Tube Length (C-T, mm) 510 540 570 600
    Horizontal TT length (mm) 541 559 575 592
    Seat Angle (°) 72,5 72,5 72,5 72,5
    Head Angle (°) 70,25 71 72 72,5
    Headtube Length (mm) 110 130 150 170
    BB Drop (mm) 70 70 70 70
    Chainstay Length (mm) 425 425 425 425
    Fork Offset (mm) 48 48 48 48
    Trail (mm) 72 67 61 58
    Wheelbase Length (mm) 1010 1021 1028 1039
    Standover (mm, center tt - ground) 792 818 843 868
    Reach (mm) 371 380 390 400
    Stack (mm) 542 565 587 608

    Bike Size S M L XL
    Stem Length (mm) 80 90 100 100
    BB Standard T47 - 86.5 mm shell width
    Headset Standard (S.H.I.S.) EC34 / 28.6 | EC44 / 40
    Fork Max Tire Clearance 650B x 52C / 700C x 45C
    Frame Max Tire Clearance 650B x 52C / 700C x 40C
    Headset Spacers 1 x 10 mm, 2 x 5 mm
    Seat Post Length (mm) 300
    Crankarm (mm) 170 170 172.5 175
    Seat Post Diameter (mm) 27.2
    Handlebar (mm, drop center-center) 420 420 440 440
    Reach (mm) 75
    Flare 10°
    Drop (mm) 116

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