HOOK

Naturally, our steel Hook is something special, being built from double-butted Columbus Cromor tubing, with a tapered headtube and a T47 bottom bracket. XS and S sizes feature 650B wheels, M - XL have 700C options and both run WTB tubeless rims and tyres on sealed hubs. A Shimano GRX groupset with a subcompact 46 / 30T crankset, combined with an 11 - 36T cassette helps to keep you spinning up and over the hills, and GRX 400 callipers deliver powerful braking on the descents. The frameset is bedecked with mounts for every scenario, including a top tube bag, triple cage mounts and bottle mount options, as well as internal dynamo routing on the full carbon fork.

METALLIC BLACK

METALLIC RED

HIGHLIGHTS

FRAME

Double butted crmo frame with tapered headtube and T47 bottom bracket.
WHEELS

XS and S with 650B wheels for proper fit without any compromises in geometry.
FORK

Full carbon fork with triple cage mounts and internal hub dynamo cable routing.
DRIVETRAIN

Hydraulic Shimano GRX 400 2 x 10 drivetrain.
CHAIN

KMC X10 EPT anti rust chain.
RIMS

Tubeless ready WTB ST i19 rims.

Item 1 of 6

"The Hook might have been designed as a gravel racer, but that doesn’t stop it also being a perfect tourer, commuter, or even summer-season cross bike."

SPECIFICATIONS
BUILD INFOS
GEOMETRY

Model	HOOK
Color 1	Metallic Black
Color 2	Metallic Red
Frame	Columbus Cromor double butted, TA dropout, rack / fender mounts, 86.5 mm T47 BB shell
Fork	Full carbon, TA, 1.1/2'' - 1.1/8'', triple cage mounts (can double as fender mounts),internal hub dynamo cable routing
Handlebar	Bombtrack CX-10 drop bar, 31.8 mm, 10° flare
Grips	Bombtrack Escape bar tape
Stem	Bombtrack Roam forged aluminium stem, -7°
Headset	Sealed external aheadset, 1.1/2'' - 1.1/8''
Levers	Shimano GRX ST-RX400 STI Hydraulic
Shifter	Shimano GRX ST-RX400 STI 2 x 10
Brakes	Shimano GRX BR-RX400 hydraulic disc brakes
Rotor	Shimano SM-RT66 160 mm rotors
Crankset	Shimano GRX FC-RX600-10, 24 mm spindle
BB	Bombtrack T47 internal sealed BB for 24 mm spindle
Pedals	-
Chain	KMC X10 EPT Anti Rust chain, 1/2'' x 11/128'', XS - S 112L, M - XL 114L
Chainring	Shimano GRX, 46 T / 30 T
Cassette	Shimano CS-HG50 10-speed, 11 - 36 T
Front derailleur	Shimano GRX FD-RX400-F
Rear derailleur	Shimano GRX RD-RX400, clutch
Front hub	Bombtrack Tau sealed hub, 6-bolt disc
Rear hub	Bombtrack Tau sealed hub, 11-speed, 6-bolt disc
Through axle	12 x 100 mm / 12 x 142 mm
Front rim	WTB ST i19 double wall, TCS 2.0, 32h
Rear rim	WTB ST i19 double wall, TCS 2.0, 32h
Saddle	Seido Comp saddle
Seat post	Bombtrack Beech 27.2 mm x 415 mm size XL; 315 mm size XS - L
Seat clamp	Bombtrack Origin 29.8 mm
Front tire	XS - S WTB Resolute 650B x 42C / M - XL WTB Venture 700C x 40C, tubeless ready
Rear tire	XS - S WTB Resolute 650B x 42C / M - XL WTB Venture 700C x 40C, tubeless ready
Fender	-
Rack	-
Kickstand	-
Light	-
Weight	11.0 kg (size M)
Weight frameset	2420 g frame (size M, incl. TA, hanger) / 600 g fork (300 mm steerer, incl. TA)
Maximum rider weight	120 kg incl. luggage
ASTM riding condition	2

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

Model	HOOK
BB standard	T47 - 86.5 mm shell width
Headset standard (S.H.I.S.)	EC34 / 28.6 \| EC44 / 40
Headset crown race angle	36°
Fork steerer inner diameter	23.6 mm
Fork max tire clearance w/o fender	650B x 52C / 700C x 45C
Frame max tire clearance w/o fender	XS - S 650B x 42C / M - XL 700C x 42C
Maximum chainring clearance 1x	40 T with 45 mm chainline
Maximum chainring clearance 2x	48 / 32 T with 46.9 mm chainline
Seat post diameter	27.2 mm
Seat clamp diameter	29.8 mm
Front derailleur clamp diameter	28.6 mm
Frame front derailleur compatible	yes
Brake mount front	FM 140 / 160
Brake mount rear	FM 140 / 160
Maximum rotor clearance front	160 mm
Maximum rotor clearance rear	160 mm
Front through axle	12 mm x 100 mm, 1.5 thread pitch
Rear through axle	12 mm x 142 mm, 1.5 thread pitch
ISO testing standard	Road
Crankarm	XS 165 mm / S - M 170 mm / L - XL 175 mm
Q Factor	151 mm
BCD crank	110 mm / 80 mm, asymmetric Shimano 4 bolts
Chainring offset	0 mm
Chainline	47 mm
Spoke length front wheel	XS - S 273, 275mm / M - XL 292 mm, 293 mm
Spoke length rear wheel	XS - S 275, 273mm / M - XL 293 mm, 291 mm
Spoke count (front / rear)	32 / 32
ERD	XS - S 570 mm / M - XL 604 mm
Front hub PCD	58 mm
Rear hub PCD	58 mm
Front hub flange distance / offset	56.5 mm center to center / 6.6 mm
Rear hub flange distance / offset	51 mm center to center / 8.8 mm
Stem length	XS - S 80 mm / M 90 mm / L - XL 100 mm
Stem angle	-7°
Headset spacers	1 x 10 mm, 2 x 5 mm
Seat post offset	24 mm
Seat post length	size XL 415 mm; size XS - L 315 mm
Bike trailer	approved
Seat tube mounted child seat	approved
Derailleur hanger	BT-DH-008
Frame small parts	BT-CR-007
Hub end caps front	BT-HC-014
Hub end caps rear	BT-HC-017
Cassette body	BT-CB-006
Crankarm bolt	-
Through axle front	BT-TA-F-601
Through axle rear	BT-TA-R-602

FRAME GEOMETRY

Model	HOOK
Bike Size	XS	S	M	L	XL
Wheel size	650B	650B	700C	700C	700C
Seat Tube Length	460	490	525	545	565
Horizontal TT length	509	523	541	563	580
Seat Angle	73.6°	73.6°	73.6°	73.1°	73.1°
Head Angle	70.6°	71.1°	71.6°	71.6°	71.6°
Headtube Length	100	110	130	150	170
BB Drop	54	54	64	64	64
Chainstay Length	410	410	425	425	425
Fork Offset	50	50	50	50	50
Trail	65	62	65	65	65
Wheelbase Length	979	989	1014	1031	1049
Standover	732	752	803	821	841
Reach	355	366	375	386	397
Stack	522	534	565	584	603
Front Center	576	586	597	615	632
Axle to Crown	400	400	400	400	400
Minimum rider height *	1500	1600	1700	1790	1880
Maximum rider height *	1610	1710	1810	1900	1990

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

Model	HOOK
Bike Size	XS	S	M	L	XL
Handlebar type	Dropbar	Dropbar	Dropbar	Dropbar	Dropbar
Width (drops)	400	400	420	440	440
Width (barends)	446	446	466	486	486
Reach	75	75	75	75	75
Flare	10°	10°	10°	10°	10°
Backsweep	-	-	-	-	-
Drop	116	116	116	116	116
Upsweep	-	-	-	-	-
Rise	-	-	-	-	-