Bombtrack Hook EXT C

Name: Bombtrack Hook EXT C
Brand: Bombtrack

2021 RoadGravel Manufacturer page

Suspension: Rigid
Wheels: 650b
Drivetrain: 1 × 11 38t / 10–42t
Gear range: 420%
Weight: 9.4 kg 20.7 lb · Reference configuration not specified
Frame: Carbon
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

16 of 19 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 T700 / T800 Hi-Mod carbon, TA, rack / fender mounts, 68 mm T47 BB shell Not identified

Suspension

1 part

Fork

Full carbon, TA, 1.1/2" - 1.1/8", triple cage mounts (can double as fender mounts), internal hub dynamo cable routing Not identified

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 38t
Front derailleur

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

Brakes

1 part

Brakes
- SRAM Rival

Wheels and tires

4 parts

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

Cockpit and contact points

7 parts

Grips
- Bombtrack
Handlebar
- Bombtrack
CX-10
Headset

Sealed integrated aheadset, 1.1/2" - 1.1/8" Not identified
Pedals

None
Saddle
- Bombtrack
Seatpost
- Bombtrack
Stem
- Bombtrack

Other components

3 parts

Fenders

None
Lights

None
Racks

None

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 376mm

Stack 568mm

Wheelbase 1025mm

Head angle 71.5°

Seat angle 73.0°

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	371	375	376	384	394
Stackmm	537	558	568	591	610
Top tube lengthmm	520	535	550	565	580
Seat tube lengthmm	490	520	540	560	580
Head tube lengthmm	120	140	150	170	190
Head tube angle	70.5°	71°	71.5°	72°	72°
Seat tube angle	74.5°	74°	73°	73°	73°
Chainstay lengthmm	435	435	435	435	435
Wheelbasemm	1018	1025	1025	1035	1050
Front centermm	592	599	601	609	624
Bottom bracket dropmm	67	67	67	67	67
Standover heightmm	759	783	798	818	837
Fork rakemm	48	48	48	48	48
Trailmm	71	67	64	61	61
Stack/reach ratio	1.45	1.49	1.51	1.54	1.55

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: Carbon
Fork material: Carbon
Bicycle weight: 9.4 kg

20.7 lb
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

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: T47
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

24.9 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2021
Sample: 668 bicycles with this information
Coverage: 86.3% of the class

Highest gear

104.5 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2021
Sample: 668 bicycles with this information
Coverage: 86.3% of the class

Shifting

Mechanical

144 of 774 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2021
Sample: 774 bicycles with this information
Coverage: 100.0% 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): 24.2–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2021
Lowest gear: 668 bicycles with this information, 86.3% of the class
Highest gear: 668 bicycles with this information, 86.3% 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 2021 builds
Specification	This bicycle Bombtrack Hook EXT C	Bombtrack Hook EXT	Bombtrack Hook EXT TI
Frame
Frame material	Carbon	Steel	Titanium
Bicycle weight	9.4 kg	11.2 kg	Not informed
Weight limit	115 kg	130 kg	130 kg
Frame weight	Not informed	Not informed	2.06 kg
Drivetrain
Front chainrings	1	1	Not informed
Smallest chainring	38	40	Not informed
Largest chainring	38	40	Not informed
Rear sprockets	11	11	Not informed
Smallest sprocket	10	11	Not informed
Largest sprocket	42	42	Not informed
Lowest gear	24.9 in	26.2 in	Not informed
Highest gear	104.5 in	100.0 in	Not informed
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Mechanical disc
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Not informed
Derailleur hanger	Not informed	Not informed	UDH
Other specifications
Bottom bracket standard	T47	T47	Not informed
Tire width	2″	2″	Not informed
Wheel material	Aluminum	Aluminum	Not informed

Changes since 2020
Specification	2020 Bombtrack Hook EXT-C	This bicycle Bombtrack Hook EXT C
Frame
Bicycle weight	Not informed	9.4 kg
Weight limit	Not informed	115 kg
Drivetrain
Smallest chainring	40	38
Largest chainring	40	38
Smallest sprocket	11	10
Lowest gear	26.2 in	24.9 in
Highest gear	100.0 in	104.5 in
Other specifications
Tire clearance	Maximum tire width: 45c; Additional specification: Wheel kind: 700	Not informed