HOOK EXT TI

Hook EXT TI is made from 3Al-2.5V Titanium, the perfect material for a gravel bike. Titanium withstands fatigue like nothing else and won’t corrode. It is lightweight, and doesn’t scratch when you strap bags to it, plus it has that special responsive zing when you push hard on the pedals. Shimano’s GRX Di2 815 groupset is the ideal match, providing punchy braking and top level transmission performance through a 48 / 31T chainset and an 11 - 34T cassette. WTB EZR rims with 27.5 x 2.0’’ Ranger tyres deliver confidence through their all-terrain grip.  
Both Seido’s MGV fork and the Hook EXT TI frame bristle with an array of mounting options – a signature feature of our brand’s essence. Load up, just ride. 

TITANIUM / BLACK

HIGHLIGHTS

  • FRAME

    Titanium 3Al-2.5V frame with T47 BB shell.

  • TUBING

    Biaxially ovalized downtube for optimized power transfer and steering precision.

  • FORK

    Seido MGV full carbon fork with lowrider mounts and internal light cable routing.

  • DRIVETRAIN

    Shimano GRX 815 Di2 2 x 11 groupset with hydraulic brakes.

  • CRANKSET

    Shimano GRX 815 48 / 31 T crank.

  • RIMS

    Tubeless ready WTB EZR i25 / i23 rims with tubeless ready WTB Ranger tires.

"This agile adventure bike is the perfect companion for technical backcountry raids."

SPECIFICATIONS

ModelHOOK EXT TI
Color 1Titanium / Black
Color 2-
FrameTitanium 3Al-2.5V, TA, rack / fender mounts, UDH derailleur hanger
ForkSeido MGV full carbon, TA, 1.1/2'' - 1.1/8'', fender / triple cage mounts, 180 mm max rotor size, lowrider rack compatible, internal hub dynamo cable routing
HandlebarSeido Tackle drop bar, 31.8 mm, 25° flare
GripsBombtrack Escape bar tape
StemSeido Chase forged aluminium stem, 0°
HeadsetSealed external aheadset, 1.1/2'' - 1.1/8''
LeversShimano GRX DI2 ST-RX815 hydraulic
ShifterShimano GRX DI2 ST-RX815 2 x 11
BrakesShimano GRX BR-RX810 flat mount hydraulic disc brakes
RotorShimano SM-RT86 180 mm front and 160 mm rear rotor
CranksetShimano GRX 810-2, hollow forged aluminium crank, 24 mm spindle
BBBombtrack T47 internal sealed BB for 24 mm spindle
Pedals-
ChainKMC X11 EPT Anti Rust chain, 1/2'' x 11/128'', 112L
ChainringShimano GRX, 48 T / 31 T
CassetteShimano Ultegra CS HG 800, 11-speed, 11 - 34 T
Front derailleurShimano GRX DI2 FD-RX815-F
Rear derailleurShimano GRX DI2 RD-RX815
Front hubBombtrack Tau sealed hub, 6-bolt disc
Rear hubBombtrack Tau sealed hub, 11-speed, 6-bolt disc
Through axle12 x 100 mm / 12 x 142 mm
Front rimWTB EZR i25 , TCS 2.0, 32h
Rear rimWTB EZR i23 , TCS 2.0, 32h
SaddleBombtrack Dart saddle
Seat postBombtrack Yew aluminium seatpost, 27.2 mm x 300 mm
Seat clampBombtrack Prime 31.8 mm
Front tireWTB Ranger TCS Light / Fast Rolling 27.5'' x 2.0'', tubeless ready
Rear tireWTB Ranger TCS Light / Fast Rolling 27.5'' x 2.0'', tubeless ready
Fender-
Rack-
Kickstand-
Light-
Weighttba
Weight frameset2060 g frame (size L, incl. TA, hanger) / 550 g fork (300 mm steerer, incl. TA)
Maximum rider weight130 kg incl. luggage
ASTM riding condition2
 

Final product may vary in appearance, finish and minor details.

BUILD INFOS

ModelHOOK EXT TI
BB standardT47 - 86.5 mm shell width
Headset standard (S.H.I.S.)EC34 / 28.6 | EC44 / 40
Headset crown race angle45°
Fork steerer inner diameter23.6 mm
Fork max tire clearance w/o fender650B x 57C / 700C x 57C
Frame max tire clearance w/o fender650B x 52C / 700C x 40C
Maximum chainring clearance 1x44 T with 45 mm chainline
Maximum chainring clearance 2x50 / 36 T with 45 mm chainline
Seat post diameter27.2 mm
Seat clamp diameter31.8 mm
Front derailleur clamp diameter31.8 mm
Frame front derailleur compatibleyes
Brake mount frontFM 160 / 180
Brake mount rearFM 140 / 160
Maximum rotor clearance front180 mm
Maximum rotor clearance rear160 mm
Front through axle12 mm x 100 mm, 1.5 thread pitch
Rear through axle12 mm x 142 mm, 1.0 thread pitch
ISO testing standardRoad
CrankarmXS - M 170 mm / L - XL 175 mm
Q Factor151 mm
BCD crank110 mm / 80 mm, asymmetric Shimano 4 bolts
Chainring offset0 mm
Chainline46.9 mm
Spoke length front wheel274 mm, 275 mm
Spoke length rear wheel273 mm, 275 mm
Spoke count (front / rear)32 / 32
ERD570 mm
Front hub PCD58 mm
Rear hub PCD58 mm
Front hub flange distance / offset56.5 mm center to center / 6.6 mm
Rear hub flange distance / offset51 mm center to center / 8.8 mm
Stem lengthXS - M 45 mm / L - XL 60 mm
Stem angle0°
Headset spacers1 x 10 mm, 2 x 5 mm
Seat post offset0 mm
Seat post length300 mm
Bike trailerapproved
Seat tube mounted child seatnot approved
Derailleur hangerSram UDH
Frame small partsBT-CR-016
Hub end caps frontBT-HC-014
Hub end caps rearBT-HC-017
Cassette bodyBT-CB-006
Crankarm bolt-
Through axle frontBT-TA-F-601
Through axle rearBT-TA-R-605
 

GEOMETRY

 

FRAME GEOMETRY

ModelHOOK EXT TI
Bike SizeXSSMLXL
Wheel size27.5''27.5''27.5''27.5''27.5''
Seat Tube Length460500530570600
Horizontal TT length520534558572597
Seat Angle73.9°73.9°73.5°73.5°73.0°
Head Angle70.9°70.9°71.5°71.5°71.5°
Headtube Length110130150170190
BB Drop7171666666
Chainstay Length425425425425425
Fork Offset5353535353
Trail6464616060
Wheelbase Length10031018103410491068
Standover753782805834857
Reach360369381390403
Stack558577593612631
Front Center588603618633652
Axle to Crown398398398398398
Minimum rider height 15001600170017901880
Maximum rider height 16101710181019001990
 

¹ 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.

HANDLEBAR GEOMETRY

ModelHOOK EXT TI
Bike SizeXSSMLXL
Handlebar typeDropbarDropbarDropbarDropbarDropbar
Width (drops)420420420440440
Width (barends)530530530550550
Reach7777777777
Flare25°25°25°25°25°
Backsweep-----
Drop128128128128128
Upsweep-----
Rise-----
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