HOOK EXT

Are you heading down the path least travelled? For a drop handlebar bike, the Hook EXT seldom faces terrain it cannot handle. A Columbus steel frame, a dedicated carbon fork and a sturdy 27.5’’ wheelset equip the EXT with an armoury to ride where other bikes would surely suffer. A Sram 1x11 Rival groupset suitably gives this machine the gears and brakes to match.

As capable on backcountry campouts as it is on post-work blasts, the Hook EXT remains the choice when you’re unsure of the terrain, but know you want to have fun riding it.

HIGHLIGHTS

WHEELS

Wide rims (i25 front / i23 rear) for improved tire performance.
FRAME

Columbus Cromor double butted frame with tapered head tube and rear light mount.
FORK

Full carbon tapered fork with internal light cable routing, through axles and triple cage mounts.
HUBS

Bombtrack Tau 12 mm through axle hubs.
CRANK

Bombtrack Lyer 30 mm aluminium crank with 40 T direct mount chainring.
DISC BRAKES

Sram Rival hydraulic disc brakes with 160 mm rotors.
MOUNTS

Top tube mounts, triple cage mounts on down and seat tube, bottle cage mounts underneath the down tube and rear rack mounts.

MATT BLACK

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MATT METALLIC GREY BLUE

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SPECIFICATIONS

Model	HOOK EXT
Color 1	Matt Black
Color 2	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'', 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	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 aluminium crank, direct mount interface (SRAM compatible),30 mm spindle
BB	BOMBTRACK T47 internal sealed BB for 30 mm spindle
Pedals	-
Chain	KMC X11 EPT Anti Rust chain, 1/2'' x 11/128'', 114L
Chainring	CNC machined aluminium, narrow-wide, 40 T
Cassette	SRAM PG-1130 11-speed, 11 - 42 T
Front derailleur	-
Rear derailleur	SRAM RIVAL 1, clutch, long cage
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 Light i25 double wall, TCS 2.0, 32h
Rear rim	WTB ST Light i23 double wall, TCS 2.0, 32h
Saddle	BOMBTRACK DART saddle
Seat post	BOMBTRACK YEW aluminium seatpost, 27.2 mm x 300 mm
Seat clamp	BOMBTRACK ORIGIN forged aluminium seat clamp, 29.8 mm
Front tire	WTB RANGER TCS LIGHT / FAST ROLLING 27.5'' x 2.0'', tubeless ready
Rear tire	WTB RANGER TCS LIGHT / FAST ROLLING 27.5'' x 2.0'', tubeless ready
Fender	-
Rack	-
Kickstand	-
Light	-
Weight	11.2 kg (size M)
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

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

BUILD INFOS

Model	HOOK EXT
BB standard	T47 - 85.5 mm shell width
Headset standard (S.H.I.S.)	EC34 / 28.6 \| EC44 / 40
Headset crown race angle	36°
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
Front derailleur clamp diameter	28.6 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 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	152 mm
BCD crank	Direct mount (Sram compatible)
Chainline	45 mm
Chainring offset	5 mm
Spoke length front wheel	274 mm, 275 mm
Spoke length rear wheel	273 mm, 275 mm
Spoke count (front / rear)	32 / 32
ERD	570 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	0 mm
Seat post length	300
Derailleur hanger	BT-DH-008
Frame small parts	BT-CR-007 / BT-CR-006
Hub end caps front	BT-HC-014
Hub end caps rear	BT-HC-017
Cassette body	BT-CB-006
Crankarm bolt	BT-CRP-002
Through axle front	BT-TA-F-601
Through axle rear	BT-TA-R-602

GEOMETRY

FRAME GEOMETRY

Model	HOOK EXT
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°
Seat Angle effective	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 ¹	1500	1600	1700	1790	1880
Maximum rider height ¹	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 EXT
Bike Size	XS	S	M	L	XL
Handlebar type	Dropbar	Dropbar	Dropbar	Dropbar	Dropbar
Width (drops)	400	420	420	440	440
Width (barends)	446	466	466	486	486
Reach	75	75	75	75	75
Flare	10°	10°	10°	10°	10°
Backsweep	-	-	-	-	-
Drop	116	116	116	116	116
Upsweep	-	-	-	-	-
Rise	-	-	-	-	-