Bombtrack Hook EXT Apex Eagle – Steel Gravel Adventure Bike

Data sheet

Telaio MTB	Gravel / Bikepacking Ready
Ruota	27.5''

More info

What defines the Hook EXT Apex Eagle

The Hook EXT Apex Eagle in Metallic Sunglow Fade is built for riders who experience exploration as a natural rhythm. The warm gradient evokes open landscapes and sunlit gravel roads, but its true identity emerges on demanding terrain.
This model pushes the Hook DNA toward rougher ground: technical gravel, light singletrack, steep climbs and routes where the surface changes constantly. The SRAM Apex Eagle 1×12 drivetrain delivers a wide, quiet and intuitive range, especially when riding fully loaded. The steel frame ensures confident handling, while the 27.5” wheels enhance traction and comfort.
If you’re looking for a capable, honest and adventure-ready bike built for long days out, the Hook EXT Apex Eagle is a trustworthy partner.

What Makes It a True Hook EXT

Off-road oriented geometry

• More stable than the standard Hook
• More agile than the Beyond series
• Predictable and fluid on mixed terrain

Designed around 27.5”

• Better traction and comfort on rough ground
• Reliable behaviour even with full bikepacking load

Steel ride quality

• Progressive, smooth feedback on long rides
• Stability and control even on demanding routes

Key Highlights

• SRAM Apex Eagle 1×12 drivetrain
• 27.5” tubeless-ready wheels
• Full-carbon fork with multiple mounts
• Steel frame with numerous attachment points
• Balanced geometry for long-distance mixed terrain

Short Description

A modern, rugged adventure gravel bike made for technical routes, multi-day trips and exploration beyond paved roads.

Ideal For

• Technical gravel
• Steep climbing routes
• Self-supported bikepacking
• Long rides on unpaved forest roads

Technical Summary (Overview)

Main Specs

• Steel double-butted frame
• Full-carbon fork
• SRAM Apex Eagle 1×12
• Hydraulic disc brakes
• 27.5” tubeless-ready wheelset
• Adventure mounting points
• 27.2 mm seatpost

Tyre Clearance (Bombtrack)

Frame – max without fenders

• 650B × 52C
• 700C × 40C

Fork – max without fenders

• 650B × 57C
• 700C × 57C

Technical Interpretation

The Hook EXT offers unusually broad tyre setup flexibility:
• Frame limit: 52 mm in 27.5 (critical number)
• In 700C: up to 40 mm, ideal for faster gravel
• Fork limit: up to 57 mm, enabling advanced setups:
– wider front tyre (mullet width) for confidence
– front traction bias for technical bikepacking
This asymmetry is one of the Hook EXT’s biggest advantages.

Rider Fit

XS: 150–161 cm
S: 160–171 cm
M: 170–181 cm
L: 179–190 cm
XL: 188–199 cm
Send height + inseam for accurate sizing.

Recommended Setups

• Frame bag + handlebar roll + saddle pack
• Wider front tyre for control
• Compatible with full touring racks
• Dynamo-ready

Why Choose Metallic Sunglow Fade

A distinctive, warm colourway that enhances visibility and gives the bike an adventurous, expressive character.

Press & Independent Impressions

• “Stable and confidence-inspiring on tough gravel.”
• “Eagle drivetrain delivers excellent versatility on steep climbs.”
• “A bike that encourages exploration without limits.”

Why Buy From Us

• Fast tracked EU shipping
• Bilingual assistance
• Clear and honest guidance
• Replies within 24h

Final CTA

Ready for your next adventure?
Add the Hook EXT Apex Eagle 2025 – Metallic Sunglow Fade or contact us at info@bikejamming.it

Technical Tables

SPECS

Color 1	Matt Black
Color 2	Matt Teal
Color 3	Metallic sunglow fade
Frame	Columbus Cromor double butted, TA, rack / fender mounts, internal light cable routing, rear light mount, ED coated, 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	Seido Tackle drop bar, 31.8 mm, 16° flare
Grips	Bombtrack Escape bar tape
Stem	Seido Meander forged aluminium stem, -6°
Headset	Seido Pro EC sealed external headset, 1.1/2'' - 1.1/8''
Levers	Sram Apex Eagle double tap hydraulic
Shifter	Sram Apex Eagle double tap 1x12
Brakes	Sram Apex flat mount hydraulic disc brakes
Rotor	Sram Centerline 180 mm front and 160 mm rear rotor
Crankset	Sram Apex Wide, DUB spindle
BB	Seido T47 Pro 85.5 mm for 30 mm spindle
Pedals	-
Chain	Sram Apex, flattop, 1/2'' x 11/128'', 112L
Chainring	Sram Apex, 12-speed, 40 T
Cassette	Sram NX Eagle PG-1230 12-speed, 11 - 50 T
Front derailleur	-
Rear derailleur	Sram Apex Eagle, clutch, long cage
Front hub	Seido Tau sealed hub, 6-bolt disc
Rear hub	Seido Tau sealed hub, HG driver, 6-bolt disc
Through axle	12 x 100 mm / 12 x 142 mm
Front rim	Seido Sinus i25 double wall asymmetric, tubeless ready, 32h
Rear rim	Seido Sinus i25 double wall asymmetric, tubeless ready, 32h
Saddle	Seido Comp saddle
Seat post	Seido Yew aluminium seatpost, 27.2 mm x 350 mm
Seat clamp	Bombtrack Prime 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	11.7 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

  BB standardT47 - 85.5 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 diameter29.8 mm
Front derailleur clamp diameter28.6 mm
Frame front derailleur compatibleyes
Brake mount frontFM 160 / 180
Brake mount rearFM 140 / 160
Frame thickness rear brake mount10 mm
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, 1.5 thread pitch
ISO testing standardRoad
CrankarmXS 165 mm / S - M 170 mm / L - XL 175 mm
Q Factor152 mm
BCD crankDirect mount (Sram compatible)
Chainring offset6 mm
Chainline47.5 mm
Spoke length front wheeltba
Spoke length rear wheeltba
Spoke count (front / rear)32 / 32
ERD551 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 - S 80 mm / M - 90 mm / L - XL 100 mm
Stem angle-6°
Headset spacers1 x 10 mm, 2 x 5 mm
Seat post offset0 mm
Seat post length350 mm
Bike trailerapproved
Seat tube mounted child seatapproved
Derailleur hangerBT-DH-008
Frame small partsBT-CR-007 / BT-CR-006
Hub end caps frontBT-HC-014
Hub end caps rearBT-HC-017
Cassette bodyBT-CB-006
Crankarm boltBT-CRP-002
Through axle frontBT-TA-F-601
Through axle rearBT-TA-R-602
GEOMETRY

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
Frame thickness rear brake mount	10 mm
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	47.5 mm
Spoke length front wheel	tba
Spoke length rear wheel	tba
Spoke count (front / rear)	32 / 32
ERD	551 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	-6°
Headset spacers	1 x 10 mm, 2 x 5 mm
Seat post offset	0 mm
Seat post length	350 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

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 ¹	1500	1600	1700	1790	1880
Maximum rider height ¹	1610	1710	1810	1900	1990

¹ Size recommendations generally represent 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. The best way to work out the correct size is to consult your Bombtrack dealer (info@bikejamming.it) or a professional bike fitter and have them determine the needed size.

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Adventure Touring

BOMBTRACK Hook EXT Apex Eagle - Metallic Sunglow Fade

Real adventure gravel