Bombtrack Hook EXT SX Eagle

2025 RoadGravel Manufacturer page

Bombtrack Hook EXT SX Eagle, color Matt Desert Green

Suspension: Rigid
Wheels: 650b
Drivetrain: 1 × 12 38t / 11–50t
Gear range: 455%
Weight: 11.7 kg 25.8 lb · Reference configuration not specified
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 156–166
SM 163–174
MD 171–182
LG 179–189
XL 185–195

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

Columbus Cromor double butted, TA, rack / fender mounts, internal light cable routing, rear light mount, 85.5 mm T47 BB shell Not identified

Suspension

1 part

Fork
- Bombtrack

Drivetrain

7 parts

Brakes

2 parts

Wheels and tires

4 parts

Cockpit and contact points

7 parts

Grips
- Bombtrack
Handlebar
- Bombtrack
Headset

Sealed external aheadset, 1.1/2'' - 1.1/8'' Not identified
Pedals

None
Saddle
- Bombtrack
Seatpost
- Bombtrack
Stem
- Bombtrack

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 387mm

Stack 589mm

Wheelbase 1025mm

Head angle 72.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 650b wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	365	374	387	396	409
Stackmm	554	573	589	608	627
Top tube lengthmm	519	533	556	570	595
Seat tube lengthmm	460	500	530	570	600
Head tube lengthmm	110	130	150	170	190
Head tube angle	71.5°	71.5°	72°	72°	72°
Seat tube angle	74.5°	74.5°	74°	74°	74°
Chainstay lengthmm	425	425	425	425	425
Wheelbasemm	995	1010	1025	1040	1060
Front centermm	581	596	610	625	645
Bottom bracket dropmm	75	75	70	70	70
Standover heightmm	748	776	803	831	855
Fork rakemm	48	48	48	48	48
Trailmm	65	65	62	62	62
Stack/reach ratio	1.52	1.53	1.52	1.54	1.53

Not published by the manufacturer: Bottom bracket height, 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: Steel
Fork material: Carbon
Bicycle weight: 11.7 kg

25.8 lb
Weight limit: 130 kg

286.6 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 38
Largest chainring: 38
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 20.9 in
Highest gear: 95.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: T47
Tire clearance: Maximum tire width: 45c; Additional specification: Wheel kind: 700
Tire width: 2″
Wheel material: Aluminum
Wheel size: 650b

Technical analysis

3 measures

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

Lowest gear

20.9 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

Highest gear

95.0 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: 8.0 km/h
Highest gear: 36.4 km/h

Total gear range 455%

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: 20.9–95.0 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

Differences across 2025 builds
Specification	This bicycle Bombtrack Hook EXT SX Eagle	Bombtrack Hook	Bombtrack Hook AL Sword	Bombtrack Hook EXT Apex Eagle	Bombtrack Hook EXT C	Bombtrack Hook EXT C Apex AXS
Frame
Frame material	Steel	Steel	Aluminum	Steel	Carbon	Carbon
Bicycle weight	11.7 kg	11.1 kg	Not informed	Not informed	Not informed	9.9 kg
Weight limit	130 kg	120 kg	120 kg	130 kg	115 kg	115 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	38
Largest chainring	38	46	48	40	38	38
Rear sprockets	12	10	10	12	11	12
Smallest sprocket	11	11	11	11	10	11
Largest sprocket	50	36	38	50	42	50
Lowest gear	20.9 in	37.1 in	23.7 in	22.0 in	24.9 in	22.0 in
Highest gear	95.0 in	121.3 in	126.6 in	100.0 in	104.5 in	100.2 in
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Mechanical disc	Hydraulic disc	Hydraulic disc	Hydraulic disc
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	Mechanical	Mechanical	Electronic
Derailleur hanger	Not informed	Not informed	UDH	Not informed	UDH	UDH
Other specifications
Tire clearance	Maximum tire width: 45c; 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	2″	42c	42c	2″	40c	40c
Wheel size	650b	650b / 700c	650b / 700c	650b	700c / 650b	700c