Bombtrack Hook EXT – Columbus Cromor Steel Gravel Bike (SRAM Rival 1×11)

The Bombtrack Hook EXT is a tough and versatile steel gravel bike built for adventure, touring, and everyday reliability. Its Columbus Cromor double-butted steel frame provides a perfect balance of strength, comfort, and classic feel, while the Seido MGV full-carbon fork ensures precise control and smooth handling on any terrain. Equipped with a SRAM Rival 1×11 drivetrain, hydraulic disc brakes, and tubeless-ready WTB wheels, the Hook EXT delivers consistent performance on tarmac, trails, and gravel roads alike.

With multiple mounting points for racks, fenders, and dynamo lighting, this bike is ready for long-distance touring or bikepacking. Available in Matt Black and Matt Teal, the Hook EXT combines timeless style with modern performance for riders who want a reliable all-rounder for any adventure.

Colors

Matt Black
Matt Teal

Frame & Fork

Frame: Columbus Cromor double-butted steel, TA, rack/fender mounts, internal light cable routing, rear-light mount, 85.5 mm T47 BB shell
Fork: Seido MGV full carbon, TA, 1.5″–1 1/8″, fender/triple-cage mounts, 180 mm max rotor size, low-rider rack compatible, internal hub-dynamo routing

Drivetrain & Gearing

Shifters: SRAM Rival 1 DoubleTap 1×11
Levers: SRAM Rival 1 hydraulic disc
Crankset: Bombtrack Lyer forged aluminium, direct-mount (SRAM compatible), 30 mm spindle
Bottom Bracket: Bombtrack T47 sealed BB for 30 mm spindle, 85.5 mm shell
Chain: KMC X11 EPT Anti-Rust 1/2″ × 11/128″, 112 links
Chainring: CNC aluminium narrow-wide 40 T
Cassette: SRAM PG-1130 11-speed (11–42 T)
Rear Derailleur: SRAM Rival 1 long cage with clutch

Brakes

System: SRAM Rival flat-mount hydraulic disc brakes
Rotors: SRAM Centerline 180 mm (front) / 160 mm (rear)

Wheels & Tires

Hubs: Bombtrack Tau sealed hubs (6-bolt disc, 12×100 mm / 12×142 mm)
Front Rim: WTB ST Light i25 TCS 2.0 (32 h)
Rear Rim: WTB ST Light i23 TCS 2.0 (32 h)
Tires: WTB Ranger TCS Light / Fast Rolling 27.5″ × 2.0″ tubeless ready

Cockpit & Contact Points

Handlebar: Bombtrack CX-10 Drop Bar 31.8 mm, 10° flare
Bar Tape: Bombtrack Escape tape
Stem: Bombtrack Roam forged aluminium –7°
Headset: Sealed external aheadset 1.5″–1 1/8″
Saddle: Bombtrack Dart saddle
Seatpost: Bombtrack Yew aluminium 27.2 mm × 300 mm
Seat Clamp: Bombtrack Origin 29.8 mm

Weight & Limits

Bike Weight: 11.2 kg (size M)
Frame Weight: 2710 g (size L, incl. TA & hanger)
Fork Weight: 550 g (300 mm steerer, incl. TA)
Max Rider Weight: 130 kg (incl. luggage)
ASTM Riding Category: 2

Note: Specifications may vary slightly depending on size or model year.

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