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.

Item 1 of 6

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

SPECIFICATIONS
BUILD INFOS
GEOMETRY

Model	HOOK EXT TI
Color 1	Titanium / Black
Color 2	-
Frame	Titanium 3Al-2.5V, TA, rack / fender mounts, UDH derailleur hanger
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	Seido Tackle drop bar, 31.8 mm, 25° flare
Grips	Bombtrack Escape bar tape
Stem	Seido Chase forged aluminium stem, 0°
Headset	Sealed external aheadset, 1.1/2'' - 1.1/8''
Levers	Shimano GRX DI2 ST-RX815 hydraulic
Shifter	Shimano GRX DI2 ST-RX815 2 x 11
Brakes	Shimano GRX BR-RX810 flat mount hydraulic disc brakes
Rotor	Shimano SM-RT86 180 mm front and 160 mm rear rotor
Crankset	Shimano GRX 810-2, hollow forged aluminium crank, 24 mm spindle
BB	Bombtrack T47 internal sealed BB for 24 mm spindle
Pedals	-
Chain	KMC X11 EPT Anti Rust chain, 1/2'' x 11/128'', 112L
Chainring	Shimano GRX, 48 T / 31 T
Cassette	Shimano Ultegra CS HG 800, 11-speed, 11 - 34 T
Front derailleur	Shimano GRX DI2 FD-RX815-F
Rear derailleur	Shimano GRX DI2 RD-RX815
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 EZR i25 , TCS 2.0, 32h
Rear rim	WTB EZR i23 , TCS 2.0, 32h
Saddle	Bombtrack Dart saddle
Seat post	Bombtrack Yew aluminium seatpost, 27.2 mm x 300 mm
Seat clamp	Bombtrack Prime 31.8 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	tba
Weight frameset	2060 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.

Model	HOOK EXT TI
BB standard	T47 - 86.5 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	31.8 mm
Front derailleur clamp diameter	31.8 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, 1.0 thread pitch
ISO testing standard	Road
Crankarm	XS - 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	46.9 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 - M 45 mm / L - XL 60 mm
Stem angle	0°
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	not approved
Derailleur hanger	Sram UDH
Frame small parts	BT-CR-016
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-605

FRAME GEOMETRY

Model	HOOK EXT TI
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	633	652
Axle to Crown	398	398	398	398	398
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 TI
Bike Size	XS	S	M	L	XL
Handlebar type	Dropbar	Dropbar	Dropbar	Dropbar	Dropbar
Width (drops)	420	420	420	440	440
Width (barends)	530	530	530	550	550
Reach	77	77	77	77	77
Flare	25°	25°	25°	25°	25°
Backsweep	-	-	-	-	-
Drop	128	128	128	128	128
Upsweep	-	-	-	-	-
Rise	-	-	-	-	-

HOOK EXT TI

TITANIUM / BLACK

FRAME

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

HOOK EXT C

BEYOND 1