the Hook EXT

Matt Forest Green

the Hook EXT is the choice when you’re unsure of the terrain, or know you want to cut loose

Introducing the Hook EXT

The Hook goes hooligan. Using the same Columbus tubing and carbon fork as the standard model, its tough and agile 650B wheels free up space for bigger tyres. Giving the Hook EXT the ability to smash its way through trails that would stall most other drop handlebar bikes, it's an unstoppable combo. Gearing and brakes are taken care of by Sram’s 1x11 Rival groupset. 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.


  • Full carbon tapered fork with internal light cable routing, through axles and triple cage mounts.
  • Columbus Cromor frame with tapered head tube, through axles, rack and fender mounts and T47 bottom bracket. 
  • New rear dropout. Same hanger as on the Beyond+. 
  • New Bombtrack Lyer 30 mm alloy crank with 40t direct mount chainring. 
  • Hydraulic Sram Rival 1x11 groupset and brakes with 11 - 42t cassette. 
  • Tubeless ready WTB ST Light i23 front rim, i21 rear rim with tubeless ready WTB Ranger Light / Fast Rolling 27.5’’ x 2.0’’ tires. 
  • Top tube bag direct mounts, triple cage mount on down tube and seat tube for optimized bottle position, bottle cage mounts underneath the down tube.



" I love to see a bike that’s completely ready for bikepacking or light touring just as it is, and the Hook EXT is exactly that. Everything is accounted for braze on-wise: three on each blade of the fork, six within the frame (allowing for lots of water bottle placement options if you’re running a partial framebag), and two below it, plus provision for mudguards, ideal for winter commuting. There are eyelets for a direct mount top tube bag, too. "
@Cass Gilbert /
Read the full review »

    WHEEL SIZE 27.5''
    COLOR 1 Matt Forest Green
    COLOR 2 -
    FRAME COLUMBUS CROMOR double butted tubing, TA dropout, replaceable hanger, rack / fender mounts, 86.5 mm T47 shell

    EXT V2 full carbon disc fork, TA, 1.1/2'' - 1.1/8'' tapered steerer, with fender / triple cage mounts, internal hub dynamo cable routing

    HEADSET FSA NO.21/12B/44 sealed external aheadset, 1.1/2'' - 1.1/8''
    BB T47 sealed BB for 30 mm spindle



    HANDLEBAR BOMBTRACK CX-10 drop bar, 31.8 mm, 10° flare
    STEM BOMBTRACK ROAM forged aluminum 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
    CRANKSET BOMBTRACK LYER forged aluminum crank, direct mount interface, 30 mm spindle
    PEDALS -
    CHAIN KMC X11 chain, 1/2'' x 11/128'', 114L
    CHAINRING CNC machined aluminum, 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, clutch, 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 Light i23 double wall, TCS 2.0, 32h
    REAR RIM WTB ST Light i21 double wall, TCS 2.0, 32h
    SEAT POST BOMBTRACK PINE aluminum seatpost, 27.2 mm x 300 mm
    SEAT CLAMP BOMBTRACK ORIGIN forged aluminum seat clamp, 29.8 mm
    FRONT TIRE WTB RANGER TCS LIGHT folding tire 27.5'' x 2.0''
    REAR TIRE WTB RANGER TCS LIGHT folding tire 27.5'' x 2.0''
    RACK -
    LIGHTS -
    WEIGHT (size M) 11

    Bike Size S M L XL
    Seat Tube Length (C-T, mm) 510 540 570 600
    Horizontal TT length (mm) 541 558 575 592
    Seat Angle (°) 72.5 72.5 72.5 72.5
    Head Angle (°) 70.3 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) 72.1 67.3 61 57.8
    Wheelbase Length (mm) 1010 1021 1028 1039
    Standover (mm, center tt - ground) 773 789 815 840
    Reach (mm) 370 380 389 399
    Stack (mm) 544 566 589 610
    Front Center (mm) 595 606 612 624
    Axle to Crown (mm) 397 397 397 397



    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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