Bombtrack Audax Evo vs Bombtrack Hook Ext

Bombtrack

Audax Evo

Bombtrack

Hook Ext

Mid-rangeSteel650b / 27.5"2025

Entry levelSteel650b / 27.5"2025

Close on the specs and the list price: here are their 19 differences, line by line.

BombtrackBombtrack Audax Evo

BombtrackBombtrack Hook Ext

At a glance

Differences only

Bombtrack Audax Evo is 1.1 kg lighter than Bombtrack Hook Ext (brand figures).
Bombtrack Audax Evo has the higher-range groupset: Shimano GRX 610 2x12, against SRAM SX Eagle.

Key specs6 differences

Model year 2025 2025

Weight 10.5 kg 11.6 kg +1.1 kg

Frame Steel

As printed

4130 double-butted chromoly

Steel

As printed

Frame: Columbus Cromor double-butted

Wheelset 650b / 27.5" · Seido Sinus i25 rims, Seido Tau hubs, 32 spokes

As printed

Seido Sinus i25, tubeless-ready, 32 spokes; Seido Tau sealed hubs

650b / 27.5" · WTB ST Light i25 double wall ^{°Value not published by the brand}

Drivetrain 2×12 1×12

Groupset Shimano GRX 610 2x12 Higher range

As printed

Shimano GRX 610, 2x12 speed, hydraulic

SRAM SX Eagle

As printed

Rear derailleur: SRAM SX Eagle, clutch, long cage

Brake model Shimano GRX BR-RX400 hydraulic

As printed

Shimano GRX BR-RX400 hydraulic disc

SRAM Level hydraulic disc

As printed

Levers and calipers: SRAM Level hydraulic disc

Seatpost Rigid · Ritchey Comp aluminium seatpost 27.2 mm x 400 mm ^{°Value not published by the brand} Rigid · Bombtrack Yew aluminium seatpost, 27.2 mm x 300 mm ^{°Value not published by the brand}

Prices

Each model's retailers, delivered to your country, and their prices over time.

Bombtrack Audax Evo

Bombtrack Hook Ext

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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.

Audax Evo · Gravel bike all-round, very nimble, average equipment.
Hook Ext · Gravel bike made for very smooth ground, very nimble, entry-level equipment.

Terrain

EasyDemanding

Handling

NimbleStable

Bombtrack Audax EvoBombtrack Hook Extother gravel bikes

Components and specs

Every spec line by line; the higher range of a component is marked. The technical groups are folded.

Ride type

Suspension Rigid ^{°Value not published by the brand} Rigid ^{°Value not published by the brand}

Frame and fork3 differences

Fork Carbon

As printed

Seido Banjo full carbon

Carbon

As printed

Fork: Bombtrack EXT full carbon

Frame weight 2,410 g 2,710 g +300 g

Max tyre clearance 47 mm 45 mm ^{°Value not published by the brand}−2 mm

Axles Thru-axles

As printed

Thru-axles: 12 x 100 mm (front), 12 x 142 mm (rear)

Thru-axles

As printed

Thru-axles: 12 x 100 mm front, 12 x 142 mm rear

Bottom bracket T47, 86.5 mm shell

As printed

86.5 mm T47 bottom bracket shell

SRAM DUB T47, 85.5 mm

As printed

Bottom bracket: SRAM DUB T47, 85.5 mm

Cable routing Internal ^{°Value not published by the brand}

As printed

internal light cable routing

Internal ^{°Value not published by the brand}

As printed

internal light cable routing

Seatpost diameter 27.2 mm ^{°Value not published by the brand} 27.2 mm

Drivetrain6 differences

Groupset brand Shimano

As printed

Shimano GRX 610

SRAM

As printed

SRAM SX Eagle

Shifting Mechanical ^{°Value not published by the brand}

As printed

Shimano GRX RD-RX820 Shimano GRX ST-RX610 STI 2 x 12

Mechanical ^{°Value not published by the brand}

As printed

SRAM SX Eagle, clutch, long cage SRAM SX-Eagle 12-speed shifter

Chainrings 2 1 −1

Gears at the back 12 12

Chainring teeth Shimano GRX FC-RX810-2, 24 mm spindle SRAM Rival Wide, DUB

As printed

Crankset: SRAM Rival Wide, DUB spindle, 8-bolt direct mount

Cassette Shimano 105 CS-HG710-12, 11-36T

As printed

Cassette: Shimano 105 CS-HG710-12, 11–36 T

SRAM PG-1210 Eagle 11-50T

As printed

Cassette: SRAM PG-1210 Eagle, 12-speed, 11-50T

Rear derailleur Shimano GRX RD-RX820 ^{°Value not published by the brand} SRAM SX Eagle, clutch, long cage ^{°Value not published by the brand}

Shifters Shimano GRX ST-RX610 STI 2 x 12 ^{°Value not published by the brand} SRAM SX-Eagle 12-speed shifter ^{°Value not published by the brand}

Brakes

Brakes Hydraulic disc

As printed

Shimano GRX BR-RX400 hydraulic disc

Hydraulic disc

As printed

SRAM Level hydraulic disc

Front rotor 160 mm 160 mm

Rear rotor 160 mm 160 mm

Wheels and tyres1 difference

Wheel size 650b / 27.5"

As printed

WTB Byway TCS 47-584

650b / 27.5"

As printed

Tires: WTB Ranger TCS Light, 27.5" x 2.0"

Rims Aluminium ^{°Value not published by the brand} Aluminium ^{°Value not published by the brand}

Tubeless ready yes yes

Tyres WTB Byway TCS 47-584 front, WTB Horizon TCS 47-584 rear

As printed

Tyres: WTB Byway TCS 47-584 (front), WTB Horizon TCS 47-584 (rear)

WTB Ranger TCS Light 27.5" x 2.0"

As printed

Tires: WTB Ranger TCS Light, Fast Rolling, 27.5" × 2.0"

Tyre width fitted 47 mm –

Cockpit and seatpost3 differences

Handlebar Ritchey Road Comp Streem III drop bar, 31.8 mm, 5° backsweep ^{°Value not published by the brand} Bombtrack Trail flat bar, 31.8 mm, 9° backsweep, 4° upsweep, 7 mm rise ^{°Value not published by the brand}

Stem Ritchey Comp 4-Axis 44 forged aluminium stem, -6° ^{°Value not published by the brand} Bombtrack Roam forged aluminium stem, -7° ^{°Value not published by the brand}

Seatpost model Ritchey Comp aluminium seatpost 27.2 mm x 400 mm ^{°Value not published by the brand} Bombtrack Yew aluminium seatpost, 27.2 mm x 300 mm ^{°Value not published by the brand}

Weight1 difference

Weighed in size M

As printed

size M

As printed

11.6 kg (size L)

Mounts and storage

Rack mounts yes yes

Mudguard mounts yes yes

° Value not published by the brand

Geometry

A size per bike (the nearest to the first one's at first), the differences measured from the reference bike.

Size of Audax Evo

Size of Hook Ext

Differences measured from

Audax Evo · M
Hook Ext · S

Stack and reach

Audax Evo · M Audax Evo · M — Reach (mm) 383 · Stack (mm) 571
Hook Ext · S Hook Ext · S — Reach (mm) 374 · Stack (mm) 573

Geometry15 differences

Size M S

Reach 383 mm 374 mm −9 mm

Stack 571 mm 573 mm +2 mm

Top tube (effective) 547 mm 533 mm −14 mm

Seat tube 520 mm 500 mm −20 mm

Head tube 150 mm 130 mm −20 mm

Head angle 72° 71.5° −0.5°

Seat angle 74° 74.5° +0.5°

Chainstays 420 mm 425 mm +5 mm

Wheelbase 1,018 mm 1,010 mm −8 mm

Front centre 607 mm 596 mm −11 mm

Standover 794 mm 776 mm −18 mm

BB drop 68 mm 75 mm +7 mm

Fork offset 53 mm 48 mm −5 mm

Trail 56 mm 65 mm +9 mm

Where to buy them

Bombtrack Audax Evo
Its full spec sheet Compare the whole Bombtrack Audax range
Bombtrack Hook Ext
Its full spec sheet Compare the whole Bombtrack Hook range

Compare the whole Bombtrack Audax range Compare the whole Bombtrack Hook range

Frequently asked questions

Which is lighter, Bombtrack Audax Evo or Bombtrack Hook Ext?

Bombtrack Audax Evo weighs 10.5 kg, Bombtrack Hook Ext 11.6 kg, as their brands give them.

What groupset do Bombtrack Audax Evo and Bombtrack Hook Ext come with?

Bombtrack Audax Evo: Shimano GRX 610 2x12. Bombtrack Hook Ext: SRAM SX Eagle.

How do Bombtrack Audax Evo and Bombtrack Hook Ext compare on geometry?

In size M, Bombtrack Audax Evo has a stack of 571 mm for a reach of 383 mm; in size S, Bombtrack Hook Ext has 573 mm for 374 mm. More stack for the reach means a more upright position.

Compare other models

Bombtrack Audax Evo vs Bombtrack Hook Ext

At a glance

Prices

Character

Components and specs

Geometry

Stack and reach

Where to buy them

Frequently asked questions

Other comparisons