Bombtrack Hook EXT C

2025 RoadGravel Manufacturer page

Suspension: Rigid
Wheels: 700c, 650b
Drivetrain: 1 × 11 38t / 10–42t
Gear range: 420%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

18 of 20 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

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 Not identified

Suspension

1 part

Fork
- Seido

Drivetrain

7 parts

Bottom bracket
- Bombtrack
Cassette
- SRAM XG-1150 FULL PIN 11 speeds 10–42t
XG-1150
Chain
- KMC X11 11 speeds
Crankset
- Bombtrack
Front derailleur

None
Rear derailleur
- SRAM Rival 1 11 speeds
Shifters
- SRAM Rival

Brakes

2 parts

Wheels and tires

4 parts

Front hub
- Hunt
Rear hub
- Hunt
Rims
- Hunt
Tires
- WTB

Cockpit and contact points

7 parts

Grips
- Bombtrack
Handlebar
- Seido
Headset

Sealed integrated aheadset, 1.1/2'' - 1.1/2'' Not identified
Pedals

None
Saddle
- Bombtrack
Seatpost
- Seido
Stem
- Bombtrack

Other components

3 parts

Fenders

None
Lights

None
Racks

None

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 396mm

Stack 595mm

Wheelbase 1060mm

Head angle 70.5°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	381	396	404	—
Stackmm	577	595	614	394
Top tube lengthmm	541	566	578	580
Seat tube lengthmm	500	530	570	580
Head tube lengthmm	130	150	170	72
Head tube angle	70.5°	70.5°	70.5°	73°
Seat tube angle	74.5°	74°	74°	73°
Chainstay lengthmm	425	429	434	—
Wheelbasemm	1035	1060	1080	—
Front centermm	620	641	656	610
Bottom bracket dropmm	72	72	72	—
Bottom bracket heightmm	277	277	277	190
Standover heightmm	793	816	845	1050
Fork rakemm	53	53	53	—
Trailmm	71	71	71	48
Stack/reach ratio	1.51	1.50	1.52	—

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon
Weight limit: 115 kg

253.5 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Rear sprockets: 11
Smallest sprocket: 10
Largest sprocket: 42
Lowest gear: 24.9 in
Highest gear: 104.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: T47
Tire clearance: Maximum tire width: 57c; Additional specification: Wheel kind: 27.5, Maximum tire width: 57c; Additional specification: Wheel kind: 700
Tire width: 40c
Wheel material: Aluminum
Wheel size: 700c, 650b

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

24.9 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Highest gear

104.5 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2025
Sample: 1,536 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

688 of 1,999 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2025
Sample: 1,999 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.5 km/h
Highest gear: 40.0 km/h

Total gear range 420%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 24.9–104.5 gear inches
Class reference (p10–p90): 22.8–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2025
Lowest gear: 1536 bicycles with this information, 76.6% of the class
Highest gear: 1536 bicycles with this information, 76.6% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2025 builds
Specification	This bicycle Bombtrack Hook EXT C	Bombtrack Hook	Bombtrack Hook AL Sword	Bombtrack Hook EXT Apex Eagle	Bombtrack Hook EXT C Apex AXS	Bombtrack Hook EXT Rival
Frame
Frame material	Carbon	Steel	Aluminum	Steel	Carbon	Steel
Weight limit	115 kg	120 kg	120 kg	130 kg	115 kg	130 kg
Bicycle weight	Not informed	11.1 kg	Not informed	Not informed	9.9 kg	11.2 kg
Frame weight	Not informed	Not informed	Not informed	2.71 kg	Not informed	Not informed
Drivetrain
Front chainrings	1	2	2	1	1	1
Smallest chainring	38	46	31	40	38	40
Largest chainring	38	46	48	40	38	40
Rear sprockets	11	10	10	12	12	11
Smallest sprocket	10	11	11	11	11	11
Largest sprocket	42	36	38	50	50	42
Lowest gear	24.9 in	37.1 in	23.7 in	22.0 in	22.0 in	26.2 in
Highest gear	104.5 in	121.3 in	126.6 in	100.0 in	100.2 in	100.0 in
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Mechanical disc	Hydraulic disc	Hydraulic disc	Hydraulic disc
Cockpit
Derailleur hanger	UDH	Not informed	UDH	Not informed	UDH	Not informed
Shifting	Mechanical	Mechanical	Mechanical	Mechanical	Electronic	Mechanical
Other specifications
Tire clearance	Maximum tire width: 57c; Additional specification: Wheel kind: 27.5, Maximum tire width: 57c; Additional specification: Wheel kind: 700	Maximum tire width: 45c; Additional specification: Wheel kind: 700	Maximum tire width: 45c; Additional specification: Wheel kind: 700	Maximum tire width: 57c; Additional specification: Wheel kind: 27.5, Maximum tire width: 57c; Additional specification: Wheel kind: 700	Maximum tire width: 57c; Additional specification: Wheel kind: 27.5, Maximum tire width: 57c; Additional specification: Wheel kind: 700	Maximum tire width: 57c; Additional specification: Wheel kind: 27.5, Maximum tire width: 57c; Additional specification: Wheel kind: 700
Tire width	40c	42c	42c	2″	40c	2″
Wheel size	700c / 650b	650b / 700c	650b / 700c	650b	700c	650b

Changes since 2024
Specification	2024 Bombtrack Hook EXT C	This bicycle Bombtrack Hook EXT C
Frame
Bicycle weight	9.4 kg	Not informed
Weight limit	105 kg	115 kg
Cockpit
Derailleur hanger	Not informed	UDH
Other specifications
Tire clearance	Maximum tire width: 45c; Additional specification: Wheel kind: 700	Maximum tire width: 57c; Additional specification: Wheel kind: 27.5, Maximum tire width: 57c; Additional specification: Wheel kind: 700
Tire width	2″	40c
Wheel size	650b	700c / 650b