HOOK EXT

Our EXT is where the Hook really starts to lead you astray. Utilising Columbus Cromor double-butted steel tubing, a tapered headtube, internal routing for dynamo lighting, and with our signature number of frame mounts, the EXT is ready for anything. Rolling on aggressive 27.5 x 2.0’’ WTB Ranger tyres, this is one very capable and exciting bike when you turn off the tarmac and head onto the trail. Sram’s hydraulic Rival 1x groupset provides both the transmission and the braking duties, featuring an 11 – 42T cassette paired with a 40T direct mount chainring and Rival rear mech. New for 2024, we fitted a Seido MGV carbon fork offering triple cage and low rider mounts, internal dynamo cable routing, as well as huge clearance for muddy high volume tyres. Turn off the gravel and head into the backcountry for some true wilderness adventure riding.

MATT BLACK

MATT TEAL

HIGHLIGHTS

FRAME

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

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

Hydraulic Sram Rival 1 x 11 groupset and brakes.
CRANKSET

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

KMC X11 EPT anti rust chain.
RIMS

Tubeless ready WTB ST Light i25 / i23 rim combination.

"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."

SPECIFICATIONS

Model	HOOK EXT
Color 1	Matt Black
Color 2	Matt Teal
Frame	Columbus Cromor double butted, TA, rack / fender mounts, internal light cable routing, rear light mount, 85.5 mm T47 BB shell
Fork	Seido 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
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
Rotor	Sram Centerline 180 mm front and 160 mm rear rotor
Crankset	Bombtrack Lyer forged aluminium crank, direct mount interface (Sram compatible),30 mm spindle
BB	Bombtrack T47 internal sealed BB for 30 mm spindle, 85.5 mm
Pedals	-
Chain	KMC X11 EPT Anti Rust chain, 1/2'' x 11/128'', 112L
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 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) / 550 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	45°
Fork steerer inner diameter	23.6 mm
Fork max tire clearance w/o fender	650B x 57C / 700C x 57C
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
Frame front derailleur compatible	yes
Brake mount front	FM 160 / 180
Brake mount rear	FM 140 / 160
Maximum rotor clearance front	180 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)
Chainring offset	6 mm
Chainline	46 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 mm
Bike trailer	approved
Seat tube mounted child seat	approved
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	520	534	558	572	597
Seat Angle	73.9°	73.9°	73.5°	73.5°	73.0°
Head Angle	70.9°	70.9°	71.5°	71.5°	71.5°
Headtube Length	110	130	150	170	190
BB Drop	71	71	66	66	66
Chainstay Length	425	425	425	425	425
Fork Offset	53	53	53	53	53
Trail	64	64	61	60	60
Wheelbase Length	1003	1018	1034	1049	1068
Standover	753	782	805	834	857
Reach	360	369	381	390	403
Stack	558	577	593	612	631
Front Center	588	603	618	632	652
Axle to Crown	410	410	410	410	410
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 EXT
Bike Size	XS	S	M	L	XL
Handlebar type	Dropbar	Dropbar	Dropbar	Dropbar	Dropbar
Width (drops)	420	420	420	440	440
Width (barends)	466	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	-	-	-	-	-