the
HOOK EXT

Made for the most extreme drop bar adventures.

"Putting more air between you and the trial, the Hook EXT is the choice when you’re unsure of the terrain, or know you want to cut loose."





  • * Columbus Cromor double butted frame
  • * Full carbon tapered fork with internal light cable routing, through axles and triple cage mounts.
  • * Integrated light cable routing and rear light mount.
  • * Toptube bag direct mounts, triple cage mount on downtube and seattube for optimized bottle position, bottle cage mounts underneath the downtube and rear rack mounts.
  • * Front derailleur compatible.
  • * 12 mm through axles front and rear.
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  • SPECIFICATION

    Color Matt Metallic Grey Blue
    Frame COLUMBUS CROMOR double butted tubing, TA,rack / fender mounts, internal light cable routing, rear light mount, 86.5 mm T47 BB shell
    Fork Full carbon, TA, 1.1/2'' - 1.1/8'', fender / triple cage mounts, internal hub dynamo cable routing
    Headset Sealed external aheadset, 1.1/2'' - 1.1/8''
    Seat clamp BOMBTRACK ORIGIN forged aluminium seat clamp, 29.8 mm
    Weight frameset 2710 g frame (size L, incl. TA, hanger)
    600 g fork (300 mm steerer, incl. TA)
    Maximum rider weight 130 kg incl. Luggage
    ASTM riding condition 2
  • BUILD INFO

    BB Standard T47 - 86.5 mm shell width
    Headset Standard (S.H.I.S.) EC34 / 28.6 | EC44 / 40
    Fork Max Tire Clearance w/o fender 650B x 52C /
    700C x 45C
    Frame Max Tire Clearance w/o fender 650B x 52C /
    700C x 40C
    Maximum chainring clearance 1x 44 T with 45 mm chainline
    Maximum chainring clearance 2x 50 / 36 T with 45 mm chainline
    Seat Post Diameter 27.2 mm
    Seat clamp diameter 29.8 mm
    Brake mount front FM
    Brake mount rear FM
    Maximum rotor clearance front 160 mm
    Maximum rotor clearance rear 160 mm
    Front through axle 12 mm x 100 mm, 1.5 TPI
    Rear through axle 12 mm x 142 mm, 1.5 TPI
    Derailleur hanger BT-DH-008
    ISO testing standard Road
  • GEOMETRY FRAME

    Bike Size XS S M L XL
    Wheel size 27.5'' 27.5'' 27.5'' 27.5'' 27.5''
    Seat Tube Length 460 500 530 570 600
    Horizontal TT length 519 533 556 570 595
    Seat Angle 74.5° 74.5° 74.0° 74.0° 74.0°
    Head Angle 71.5° 71.5° 72.0° 72.0° 72.0°
    Headtube Length 110 130 150 170 190
    BB Drop 75 75 70 70 70
    Chainstay Length 425 425 425 425 425
    Fork Offset 48 48 48 48 48
    Trail 65 65 62 62 62
    Wheelbase Length 995 1010 1025 1040 1060
    Standover 748 776 803 831 855
    Reach 365 374 387 396 409
    Stack 554 573 589 608 627
    Front Center 581 596 610 625 645
    Axle to Crown 398 398 398 398 398
    Minimum rider height * 1500 1600 1700 1790 1880
    Maximum rider height * 1610 1710 1810 1900 1990

    * Our bike size recommendation generally represents a rough guideline for quickly narrowing down the sizes from which to choose based on the body height. Bike fitting is a complex topic and other measurements and factors have to be accounted for as well. Since no two human bodys are exactly the same it is not possible to give a 100% correct advice for everyone. Therefore BOMBTRACK cannot guarantee for the stated recommendations to be correct for every individual customer. The best way to work out the correct size is to consult a local BOMBTRACK dealer or a professional bike fitter and have them determine the needed size.

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