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2025 Bombtrack

HOOK EXT C

A carbon frame gravel bike with upper mid-range components and sram rival hydraulic disc brakes.
Compare the full range

FrameCarbon
SuspensionRigid
ForkCarbon
Wheels700c / 650b Aluminum
Drivetrain1 × 11
GroupsetRival
BrakesSRAM Rival Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
HOOK EXT C
Other Gravel bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

31 mph

HOOK EXT C

36 mph

Similar Bikes

Highest gear

(descending)

Sizing
SM

5'2" – 5'8"

MD

5'6" – 5'11"

LG

5'10" – 6'3"

XL

6'1" – 6'7"

🐐 Estimated

Rider Fit Notes

None yet.

Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.

Reviews
road.cc
The bike that went to jail: Sofiane Sehili’s Bombtrack Hook EXT Ti from his Eurasian record bid

Nov 2025

Ultra-endurance rider Sofiane Sehili’s latest adventure included forests, barbed wire, and a spell in a Russian jail – but he and his gravel bike eventually made it home unscathed. Here’s the full lowdown on the machine behind his record-breaking ambition

Read Review

Bikerumor
Bombtrack Beyond ALloy & SUS Adventure Gravel Bikes, plus AXS Hook EXT & Apex Arise

Feb 2023 · Cory Benson

Bombtrack adds AL alloy & SUSpension Beyond adventure bikepacking bikes, upgrades Hook EXT with AXS & Arise SG with Apex...

Read Review

BIKEPACKING.com
Samer and his Panamerican Bombtrack Hook EXT

Aug 2022 · Cass Gilbert

In our latest Rider and Rig, we catch up with Samer Abouhamad on his way down to Patagonia aboard his streamlined Bombtrack EXT...

Read Review

Geometry
Specs
Build
Frame

Toray T800 carbon blend, TA, rack / fender mounts, internal hub dynamo cable routing, 85.5 mm T47 BB shell, UDH derailleur hanger, optional full internal cable routing

BB StandardT47, Threaded

Hanger StandardUDH

Tire Clearance57c (27.5″) / 57c (700c)

ColorsMetallic Black; Light Blue

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

Bottom Bracket

Bombtrack T47 internal sealed BB for 30 mm spindle

Headset

Sealed integrated aheadset, 1.1/2'' - 1.1/2''

Stem

Bombtrack Roam forged aluminium stem, -7°

Handlebar

Seido Tackle drop bar, 31.8 mm, 16° flare

Saddle

Bombtrack Dart saddle

Seatpost

Seido Yew aluminium seatpost, 27.2 mm x 350 mm

TypeRigid

Pedals

-

Grips

Bombtrack Escape bar tape

Groupset
Rear Derailleur

SRAM Rival 1, clutch, long cage

Front Derailleur

-

Crank

Bombtrack Lyer forged aluminium crank, direct mount interface, (SRAM compatible),30 mm spindle

Shifters

SRAM Rival 1 double tap 1 x 11

Cassette

SRAM XG-1150 11-speed, 10 - 42 T

Chain

KMC X11 EPT Anti Rust chain, 1/2'' x 11/128'', 114L

Brakes

SRAM Rival flat mount hydraulic disc brakes with 160 mm rotors

TypeSRAM Rival Hydraulic Disc

Wheels
Rims

Front: Hunt Hunt 4 Season Gravel Disc double wall asymmetric rim, TLC, i21, 28h, Rear: Hunt Hunt 4 Season Gravel Disc double wall asymmetric rim, TLC, i21, 28h

Front Hub

Hunt 4 Season Gravel Disc sealed hub, centerlock disc

Rear Hub

Hunt 4 Season Gravel Disc sealed hub, centerlock disc, XD cassette body

Tires

Front: WTB Venture TCS Light 700C x 40C, tubeless ready, Rear: WTB Venture TCS Light 700C x 40C, tubeless ready

Disc Rotors

SRAM Centerline 180 mm front and 160 mm rear rotor

Accessories
Lights

-

Fenders

-

Racks

-

Rider Notes
Riders Also Viewed

First added July 12

Last updated July 19

Not listed for 314 days