Bombtrack Hook EXT-C

Name: Bombtrack Hook EXT-C
Brand: Bombtrack

2020 RoadGravel Manufacturer page

Suspension: Rigid
Wheels: 650b
Drivetrain: 1 × 11 40t / 11–42t
Gear range: 382%
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 dropout, replaceable hanger, rack / fender mounts, 68 mm T47 shell Not identified

Suspension

1 part

Fork

full carbon disc fork, TA, 1.1/2" - 1.1/8" tapered steerer, with fender / triple cage mounts Not identified

Drivetrain

7 parts

Bottom bracket

T47 sealed BB for 30 mm spindle Not identified
Cassette
- SRAM PG-1130 11 speeds 11–42t
PG-1130
Chain
- KMC X11 11 speeds
Crankset
- Bombtrack 40t
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

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 371mm

Stack 569mm

Wheelbase 1021mm

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	376	375	371	380	384
Stackmm	539	558	569	590	607
Top tube lengthmm	525	535	545	560	575
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°	72.5°
Chainstay lengthmm	435	435	435	435	435
Wheelbasemm	1024	1027	1021	1032	1042
Front centermm	599	601	595	606	616
Bottom bracket dropmm	69	67	67	67	65
Standover heightmm	767	784	796	816	835
Fork rakemm	50	50	50	50	50
Trailmm	68.8	65.6	62.4	59.2	59.2
Stack/reach ratio	1.43	1.49	1.53	1.55	1.58

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

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 40
Largest chainring: 40
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 26.2 in
Highest gear: 100.0 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

26.2 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2020
Sample: 640 bicycles with this information
Coverage: 82.6% of the class

Highest gear

100.0 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2020
Sample: 640 bicycles with this information
Coverage: 82.6% of the class

Shifting

Mechanical

123 of 774 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2020
Sample: 774 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.0 km/h
Highest gear: 38.3 km/h

Total gear range 382%

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: 26.2–100.0 gear inches
Class reference (p10–p90): 24.3–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2020
Lowest gear: 640 bicycles with this information, 82.6% of the class
Highest gear: 640 bicycles with this information, 82.6% 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 2020 builds
Specification	This bicycle Bombtrack Hook EXT-C	Bombtrack Hook 1	Bombtrack Hook 2	Bombtrack Hook ADV	Bombtrack Hook EXT	Bombtrack Hook WMN
Frame
Intended fit	Unisex	Unisex	Unisex	Unisex	Unisex	womens
Frame material	Carbon	Steel	Steel	Steel	Steel	Steel
Fork material	Carbon	Aluminum	Carbon	Not informed	Carbon	Carbon
Suspension
Suspension configuration	Rigid	Rigid	Rigid	Hardtail	Rigid	Rigid
Front travel	Not informed	Not informed	Not informed	40 mm	Not informed	Not informed
Drivetrain
Front chainrings	1	2	1	1	1	2
Smallest chainring	40	32	40	38	40	30
Largest chainring	40	48	40	38	40	46
Rear sprockets	11	9	11	11	11	10
Largest sprocket	42	36	42	42	42	34
Lowest gear	26.2 in	25.8 in	27.6 in	24.9 in	26.2 in	25.6 in
Highest gear	100.0 in	126.6 in	105.5 in	95.0 in	100.0 in	121.3 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Mechanical disc	Hydraulic disc	Hydraulic disc	Mechanical disc
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Rigid seatpost	Rigid seatpost
Other specifications
Suspension	Rigid	Rigid	Rigid	Hardtail	Rigid	Rigid
Tire clearance	Maximum tire width: 45c; Additional specification: Wheel kind: 700	Maximum tire width: 40c; Additional specification: Wheel kind: 700	Maximum tire width: 40c; 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: 40c; Additional specification: Wheel kind: 27.5
Tire width	2″	35c	37c	2.25″	2″	40c
Wheel size	650b	700c	700c	650b	650b	650b / 700c
Fork spring	Not informed	Not informed	Not informed	Air	Not informed	Not informed

Changes since 2019
Specification	2019 Bombtrack Hook EXT-C	This bicycle Bombtrack Hook EXT-C
Frame
Bicycle weight	9.6 kg	Not informed
Other specifications
Bottom bracket standard	PF30	T47
Tire clearance	Maximum tire width: 54c; Additional specification: Wheel kind: 27.5, Maximum tire width: 45c; Additional specification: Wheel kind: 700	Maximum tire width: 45c; Additional specification: Wheel kind: 700
Tire width	2.1″	2″