Bombtrack Hook Grx400
Metallic Black
Bombtrack Hook Grx400
gravel bike, steel frame, 29" front, 27.5" rear wheels, 2×10 drivetrain, entry level equipment
Key specs
- Model year
- 2024
- Weight
- 11 kg
- Frame
- Steel
- Wheelset
- 29" front, 27.5" rear · WTB ST i19 double wall
Frame: Columbus Cromor steel, double-butted
- Drivetrain
- 2×10
- Groupset
- Shimano GRX RX400
- Brake model
- Shimano GRX hydraulic disc
- Seatpost
- Rigid · BOMBTRACK BEECH 27.2 mm x 300 mm
Shifters: Shimano GRX ST-RX400, 2x10; Rear derailleur: Shimano GRX RD-RX400
Levers and calipers: Shimano GRX hydraulic disc
Character
The bike at a glance: the ground it is made for, how it handles, its gears and its equipment, beside the other bikes of its kind.
« Gravel bike rather for smooth ground, neutral handling, entry-level equipment. »
EasyDemanding
Made for smooth ground, more than other gravel bikes.
NimbleStable
Between nimble and stable, like most other gravel bikes.
Gearing
Not enough data yet for this chart: it fills in as soon as the specs are in.
Equipment level
Not enough data yet for this chart: it fills in as soon as the specs are in.
Equipment: entry level for its category.
Equipment score: 34/100 (frame, groupset, wheels, suspension).
Hook Grx400other gravel bikes
Spec sheet
Every value is read on the brand’s page; hover it to see its source and date.
Ride type
- Ride type
- Being updated
- Suspension
- Rigid
Frame and fork
- Frame
- Steel
- Fork
- Carbon
- Frame weight
- 2,420 g
- Max tyre clearance
- 45 mm
- Axles
- Thru-axles
- Bottom bracket
- Bombtrack T47 internal sealed, 86.5 mm shell
- Seatpost diameter
- 27.2 mm
Frame: Columbus Cromor steel, double-butted
Fork: Full carbon
Through axles: 12 x 100 mm front, 12 x 142 mm rear
Bottom bracket: Bombtrack T47 internal sealed, 86.5 mm shell
Drivetrain
- Groupset brand
- Shimano
- Groupset
- Shimano GRX RX400
- Shifting
- Mechanical
- Chainrings
- 2
- Gears at the back
- 10
- Chainring teeth
- Shimano GRX FC-RX600-10
- Cassette
- Shimano CS-HG50 11-36T
- Rear derailleur
- SHIMANO GRX RD-RX400, clutch
- Shifters
- SHIMANO GRX ST-RX400 STI 2 x 10
Shimano GRX ST-RX400
Shifters: Shimano GRX ST-RX400, 2x10; Rear derailleur: Shimano GRX RD-RX400
SHIMANO GRX RD-RX400, clutch SHIMANO GRX ST-RX400 STI 2 x 10
Crankset: Shimano GRX FC-RX600-10, 24 mm spindle
Cassette: Shimano CS-HG50, 10-speed, 11-36T
Brakes
- Brakes
- Hydraulic disc
- Brake model
- Shimano GRX hydraulic disc
- Front rotor
- 160 mm
- Rear rotor
- 160 mm
Levers and calipers: Shimano GRX hydraulic disc
Levers and calipers: Shimano GRX hydraulic disc
Wheels and tyres
- Wheel size
- 29" front, 27.5" rear
- Wheelset
- WTB ST i19 double wall
- Rims
- Aluminium
- Tubeless ready
- yes
- Tyres
- XS - S WTB RESOLUTE 42-584 /, M - XL WTB VENTURE 40-622, tubeless ready
Cockpit and seatpost
- Seatpost
- Rigid
- Handlebar
- BOMBTRACK CX-10 drop bar, 31.8 mm, 10° flare
- Stem
- BOMBTRACK ROAM forged aluminium stem, -7°
- Seatpost model
- BOMBTRACK BEECH 27.2 mm x 300 mm
Weight
- Weight
- 11 kg
- Weighed in size
- M
Complete bike: 11.0 kg (size M)
Mounts and storage
- Rack mounts
- yes
- Mudguard mounts
- yes
- Top tube mounts
- yes
Geometry
- Geometry size
- M
- Stack
- 565 mm
- Reach
- 378 mm
- Head angle
- 72 °
- Seat angle
- 74 °
- Chainstays
- 425 mm
- Wheelbase
- 1,010 mm
- Bottom bracket drop
- 67 mm
Spec sheets read at: bombtrack.com
Geometry
5 sizes: XS, S, M, L, XL.
| Geometry of the Hook Grx400 per size | |||||
|---|---|---|---|---|---|
| Reach (mm) | 358 | 369 | 378 | 389 | 400 |
| Stack (mm) | 523 | 534 | 565 | 584 | 603 |
| Top tube (effective) (mm) | 508 | 522 | 540 | 562 | 579 |
| Seat tube (mm) | 460 | 490 | 525 | 545 | 565 |
| Head tube (mm) | 100 | 110 | 130 | 150 | 170 |
| Head angle (°) | 71 | 71.5 | 72 | 72 | 72 |
| Seat angle (°) | 74 | 74 | 74 | 73.5 | 73.5 |
| Chainstays (mm) | 410 | 410 | 425 | 425 | 425 |
| Wheelbase (mm) | 975 | 985 | 1,010 | 1,027 | 1,045 |
| Front centre (mm) | 572 | 582 | 594 | 611 | 629 |
| Standover (mm) | 731 | 751 | 802 | 820 | 840 |
| BB drop (mm) | 57 | 57 | 67 | 67 | 67 |
| BB height (mm) | 0 | 0 | 282 | 282 | 282 |
| Fork offset (mm) | 48 | 48 | 48 | 48 | 48 |
| Trail (mm) | 65 | 62 | 64 | 64 | 64 |
The range
Its comparisons
Comparable gravel bikes
Who is it for?
The sports the brand announces, and the features that go with them.
Cycling
- Max tyre clearance: 45 mm
- Groupset: Shimano GRX RX400
- Weight: 11 kg
Frequently asked questions
How wide a tyre fits the Bombtrack Hook Grx400?
Up to 45 mm, according to the brand.
Can the Bombtrack Hook Grx400 take a rack?
Yes: the brand lists rack mounts, bikepacking welcome.
Can the Bombtrack Hook Grx400 take mudguards?
Yes: the brand lists mudguard mounts.