Bombtrack Audax: every build compared

Audax Al Rd-m665m

Entry levelAluminium650b / 27.5"2024

Audax Al Sword

Entry levelAluminium650b / 27.5"2025

Audax Tiagra Rd-4700-gs

Entry levelAluminium700c2026

Audax Grx810

Entry levelSteel650b / 27.5"2024

The 5 builds of the line side by side, from the cheapest list price: what each step up changes.

BombtrackBombtrack Audax Al Rd-m665m

BombtrackBombtrack Audax Al Sword

Bombtrack Audax Tiagra Rd-4700-gs, side view

BombtrackBombtrack Audax Tiagra Rd-4700-gs

BombtrackBombtrack Audax Grx810

At a glance

Differences only

Bombtrack Audax Tiagra Rd-4700-gs is 500 g lighter than Bombtrack Audax Grx810 (brand figures).
Bombtrack Audax Grx810 has the higher-range groupset: Shimano GRX 600 2x11, against Shimano Tiagra 4700 2x10.
Bombtrack Audax Tiagra Rd-4700-gs is the newer model (2026).

Key specs8 differences

Model year 2024 2025 2026 2024

Weight 10.4 kg 10.7 kg +300 g 10.3 kg −100 g 10.8 kg +400 g

Frame Aluminium

As printed

6061-T6 double-butted aluminium

Aluminium

As printed

6061-T6 double-butted aluminium

Aluminium

As printed

6061-T6 double-butted aluminium

Steel

As printed

Columbus Cromor double-butted steel

Wheelset 650b / 27.5" · WTB ST i21 rims, Bombtrack Arc hubs, 32 spokes

As printed

WTB ST i21 double-wall, TCS 2.0, 32 spokes; Bombtrack Arc sealed hubs

650b / 27.5" · WTB ST i21 rims, Bombtrack Arc hubs, 32 holes

As printed

WTB ST i21 double-wall rims, TCS 2.0, 32 holes; Bombtrack Arc sealed hubs

700c · Seido Sinus i21 rims, Bombtrack Arc hubs, 32 spokes

As printed

Rims: Seido Sinus i21, tubeless ready, 32 spokes; Bombtrack Arc sealed hubs

650b / 27.5" · WTB ST i25 rims, Bombtrack Tau hubs, 32 spokes

As printed

WTB ST i25 double-wall rims, 32 spokes, TCS 2.0; Bombtrack Tau sealed hubs

Drivetrain 1×11 1×10 2×10 2×11

Groupset Microshift 11-speed, RD-M6655

As printed

Shifting: Microshift 11-speed; Rear derailleur: Microshift RD-M6655

Microshift Sword 1x10

As printed

Groupset: Microshift Sword (shifters, rear derailleur, cassette)

Shimano Tiagra 4700 2x10

As printed

Groupset: Shimano Tiagra 4700; ST-4700 STI, 2x10; RD-4700-GS

Shimano GRX 600 2x11 Higher range

As printed

Shimano GRX 600 (2x11); RD GRX RD-RX810, FD GRX FD-RX810, shifters GRX ST-RX600

Brake model TRP Spyre C, Microshift SB-M110 levers

As printed

Levers: Microshift SB-M110 dual-control, mechanical; Calipers: TRP Spyre C, flat-mount

TRP Spyre C flat-mount

As printed

TRP Spyre C flat-mount mechanical disc brakes

TRP Spyre C flat mount, Tiagra ST-4700 levers

As printed

Brakes: TRP Spyre C, flat mount, mechanical disc; Levers: Shimano Tiagra ST-4700 STI

Shimano GRX BR-RX400 hydraulic, GRX ST-RX600 levers

As printed

Shimano GRX BR-RX400 hydraulic disc brakes with GRX ST-RX600 hydraulic levers

Seatpost Rigid · BOMBTRACK BEECH aluminium seatpost, 27.2 mm x 400 mm ^{°Value not published by the brand} Rigid · Seido Yew Offset 27.2 mm x 355 mm ^{°Value not published by the brand} Rigid · Seido Beech 27.2 mm x 350 mm ^{°Value not published by the brand} Rigid · RITCHEY COMP 2-BOLT aluminium seatpost 27.2 mm x 400 mm ^{°Value not published by the brand}

Prices

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

Bombtrack Audax Al Rd-m665m

Bombtrack Audax Al Sword

Bombtrack Audax Tiagra Rd-4700-gs

Bombtrack Audax Grx810

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 Al Rd-m665m · Gravel bike all-round, rather nimble, entry-level equipment.
Audax Al Sword · Gravel bike all-round, very nimble, entry-level equipment.
Audax Tiagra Rd-4700-gs · Gravel bike made for very smooth ground, entry-level equipment.
Audax Grx810 · Gravel bike all-round, rather nimble, entry-level equipment.

Terrain

EasyDemanding

Handling

NimbleStable

Bombtrack Audax Al Rd-m665mBombtrack Audax Al SwordBombtrack Audax Tiagra Rd-4700-gsBombtrack Audax Grx810other 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} Rigid ^{°Value not published by the brand} Rigid ^{°Value not published by the brand}

Frame and fork3 differences

Fork Carbon

As printed

Fork: full carbon

Carbon

As printed

Fork: Full carbon

Carbon

As printed

Full carbon, thru-axle (TA)

Carbon

As printed

Fork: Full carbon

Frame weight 1,810 g 1,810 g 1,810 g 2,410 g +600 g

Max tyre clearance 50 mm 50 mm 50 mm 47 mm −3 mm

Axles Thru-axles

As printed

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

Thru-axles

As printed

12 x 100 mm front and 12 x 142 mm rear through axles

Thru-axles

As printed

Through axles: Front 12 x 100 mm; rear 12 x 142 mm

Thru-axles

As printed

Thru-axles are 12x100 mm front and 12x142 mm rear

Bottom bracket T47, 86.5 mm shell

As printed

T47 bottom bracket shell (86.5 mm)

T47, 86.5 mm shell

As printed

86.5 mm T47 bottom bracket shell

T47, 86.5 mm shell

As printed

Seido T47 internal sealed, 86.5 mm shell

BOMBTRACK T47 internal sealed BB for 30 mm spindle ^{°Value not published by the brand}

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

As printed

internal light cable routing

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

Drivetrain7 differences

Groupset brand microSHIFT

As printed

Microshift RD-M6655

microSHIFT

As printed

Microshift Sword

Shimano

As printed

Shimano Tiagra 4700

Shimano

As printed

Shimano GRX 600

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

As printed

MICROSHIFT RD-M665M, clutch, medium cage MICROSHIFT SB-M110 DUAL CONTROL LEVER 1 x 11

Mechanical ^{°Value not published by the brand}

As printed

Microshift Sword RD-G7025L, clutch, medium cage Microshift Sword SB-G7000 dual control lever 1 x 10

Mechanical ^{°Value not published by the brand}

As printed

Shimano Tiagra RD-4700-GS Shimano Tiagra ST-4700 STI 2 x 10

Mechanical ^{°Value not published by the brand}

As printed

SHIMANO ULTEGRA RD-RX800-GS, clutch, medium cage SHIMANO 105 ST-R7020 STI 2 x 11

Chainrings 1 1 2 +1 2 +1

Gears at the back 11 10 −1 10 −1 11

Chainring teeth Bombtrack Lyer forged aluminium, 30 mm spindle

As printed

Bombtrack Lyer forged aluminium, direct mount, 30 mm spindle

Bombtrack Lyer forged aluminium crank, direct mount interface, (SRAM compatible),30 mm spindle ^{°Value not published by the brand} Shimano Tiagra FC-4700, 24 mm spindle

As printed

Shimano Tiagra FC-4700, 24 mm spindle, 110 mm BCD

BOMBTRACK LYER forged aluminium crank, direct mount interface, (SRAM compatible),30 mm spindle ^{°Value not published by the brand}

Cassette Microshift CS-HG113, 11-46T

As printed

Cassette: Microshift CS-HG113, 11-46T

Microshift CS-H105, 11-48T

As printed

Cassette: Microshift CS-H105, 11-48T

Shimano CS-HG500, 11-34T

As printed

Cassette: Shimano CS-HG500, 10-speed, 11–34T

Shimano 105, 11-34T

As printed

11-speed cassette, 11–34T (Shimano 105)

Rear derailleur MICROSHIFT RD-M665M, clutch, medium cage ^{°Value not published by the brand} Microshift Sword RD-G7025L, clutch, medium cage ^{°Value not published by the brand} Shimano Tiagra RD-4700-GS ^{°Value not published by the brand} SHIMANO ULTEGRA RD-RX800-GS, clutch, medium cage ^{°Value not published by the brand}Higher range

Shifters MICROSHIFT SB-M110 DUAL CONTROL LEVER 1 x 11 ^{°Value not published by the brand} Microshift Sword SB-G7000 dual control lever 1 x 10 ^{°Value not published by the brand} Shimano Tiagra ST-4700 STI 2 x 10 ^{°Value not published by the brand} SHIMANO 105 ST-R7020 STI 2 x 11 ^{°Value not published by the brand}Higher range

Brakes1 difference

Brakes Mechanical disc

As printed

TRP Spyre C, flat-mount, mechanical disc

Mechanical disc

As printed

TRP Spyre C flat-mount mechanical disc brakes

Mechanical disc

As printed

TRP Spyre C, flat mount, mechanical disc

Hydraulic disc

As printed

Shimano GRX BR-RX400 hydraulic disc brakes

Front rotor 160 mm 160 mm 160 mm 160 mm

Rear rotor 160 mm 160 mm 160 mm 160 mm

Wheels and tyres3 differences

Wheel size 650b / 27.5"

As printed

WTB Horizon 47-584

650b / 27.5"

As printed

WTB Horizon 47-584 (650B x 47C)

700c / 29"

As printed

WTB Byway TCS 34-622 (700 x 34 mm)

650b / 27.5"

As printed

WTB Byway TCS 47-584

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

Tubeless ready–– yes yes ^{°Value not published by the brand}

Tyres WTB Horizon 47-584

As printed

Tyres: WTB Horizon 47-584

WTB Horizon 47-584

As printed

Tyres: WTB Horizon 47-584 (650B x 47C)

WTB Byway TCS 34-622

As printed

WTB Byway TCS 34-622, tubeless ready (700 x 34 mm)

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

Tyre width fitted 47 mm 47 mm 34 mm −13 mm 47 mm

Cockpit and seatpost3 differences

Handlebar BOMBTRACK CX-10 drop bar, 31.8 mm, 10° flare ^{°Value not published by the brand} Seido CX-10 drop bar, 31.8 mm, 10° flare ^{°Value not published by the brand} Seido CX-10 drop bar, 31.8 mm, 10° flare ^{°Value not published by the brand} RITCHEY COMP STREEM III drop bar, 31.8 mm, 5° backsweep ^{°Value not published by the brand}

Stem BOMBTRACK ROAM forged aluminium stem, -7° ^{°Value not published by the brand} Seido Meander forged aluminium stem, -6° ^{°Value not published by the brand} Seido Meander forged aluminium stem, -6° ^{°Value not published by the brand} RITCHEY COMP 4-AXIS 44 forged aluminium stem, -6° ^{°Value not published by the brand}

Seatpost model BOMBTRACK BEECH aluminium seatpost, 27.2 mm x 400 mm ^{°Value not published by the brand} Seido Yew Offset 27.2 mm x 355 mm ^{°Value not published by the brand} Seido Beech 27.2 mm x 350 mm ^{°Value not published by the brand} RITCHEY COMP 2-BOLT aluminium seatpost 27.2 mm x 400 mm ^{°Value not published by the brand}

Weight1 difference

Weighed in size M

As printed

size M

As printed

size M

As printed

size L

As printed

size M

Max total weight 120 kg – 120 kg 120 kg

Mounts and storage

Rack mounts––– yes

Mudguard mounts yes yes 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 Al Rd-m665m

Size of Audax Al Sword

Size of Audax Grx810

Differences measured from

Audax Al Rd-m665m · M
Audax Al Sword · M
Audax Grx810 · M

Stack and reach

Audax Al Rd-m665m · M Audax Al Rd-m665m · M — Reach (mm) 390 · Stack (mm) 561
Audax Al Sword · M Audax Al Sword · M — Reach (mm) 390 · Stack (mm) 561
Audax Grx810 · M Audax Grx810 · M — Reach (mm) 384 · Stack (mm) 574

Geometry9 differences

Size M M – M

Reach 390 mm 390 mm – 384 mm −6 mm

Stack 561 mm 561 mm – 574 mm +13 mm

Top tube (effective) 551 mm 551 mm – 544 mm −7 mm

Seat tube 530 mm 530 mm – 520 mm −10 mm

Head tube 150 mm 150 mm – 145 mm −5 mm

Head angle 72° 72° – 72°

Seat angle 74° 74° – 74°

Chainstays 420 mm 420 mm – 420 mm

Wheelbase 1,021 mm 1,019 mm −2 mm– 1,018 mm −3 mm

Front centre 610 mm 608 mm −2 mm– 607 mm −3 mm

Standover 782 mm 782 mm – 793 mm +11 mm

BB drop 68 mm 68 mm – 68 mm

Fork offset 53 mm 53 mm – 53 mm

Trail 56 mm 58 mm +2 mm– 56 mm

Where to buy them

Bombtrack Audax Al Rd-m665m
Its full spec sheet Compare the whole Bombtrack Audax range
Bombtrack Audax Al Sword
Its full spec sheet Compare the whole Bombtrack Audax range
Bombtrack Audax Tiagra Rd-4700-gs
Its full spec sheet Compare the whole Bombtrack Audax range
Bombtrack Audax Grx810
Its full spec sheet Compare the whole Bombtrack Audax range

Compare other models

Bombtrack Audax: every build compared

At a glance

Prices

Character

Components and specs

Geometry

Stack and reach

Where to buy them

Other comparisons