Bombtrack Audax Tiagra Rd-4700-gs vs Bombtrack Audax Al

Bombtrack

Audax Tiagra Rd-4700-gs

Bombtrack

Audax Al

Entry levelAluminium700c2026

Entry levelAluminium650b / 27.5"2024

Two builds of the Bombtrack Audax line: 20 differences, mostly in the components.

Bombtrack Audax Tiagra Rd-4700-gs, side view

BombtrackBombtrack Audax Tiagra Rd-4700-gs

BombtrackBombtrack Audax Al

At a glance

Differences only

Bombtrack Audax Tiagra Rd-4700-gs is 100 g lighter than Bombtrack Audax Al (brand figures).
Bombtrack Audax Tiagra Rd-4700-gs is the newer model (2026).

Key specs7 differences

Model year 2026 2024

Weight 10.3 kg 10.4 kg +100 g

Frame Aluminium

As printed

6061-T6 double-butted aluminium

Aluminium

As printed

6061-T6 double-butted aluminium

Wheelset 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 i21 rims, Bombtrack Arc hubs, 32 spokes

As printed

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

Drivetrain 2×10 1×11

Groupset Shimano Tiagra 4700 2x10

As printed

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

Microshift 11-speed, RD-M6655

As printed

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

Brake model 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

TRP Spyre C, Microshift SB-M110 levers

As printed

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

Seatpost Rigid · Seido Beech 27.2 mm x 350 mm ^{°Value not published by the brand} Rigid · BOMBTRACK BEECH 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 Tiagra Rd-4700-gs

Bombtrack Audax Al

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

Terrain

EasyDemanding

Bombtrack Audax Tiagra Rd-4700-gsBombtrack Audax Alother 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 fork

Fork Carbon

As printed

Full carbon, thru-axle (TA)

Carbon

As printed

Fork: full carbon

Frame weight 1,810 g 1,810 g

Max tyre clearance 50 mm 50 mm

Axles Thru-axles

As printed

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

Thru-axles

As printed

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

Bottom bracket T47, 86.5 mm shell

As printed

Seido T47 internal sealed, 86.5 mm shell

T47, 86.5 mm shell

As printed

T47 bottom bracket shell (86.5 mm)

Seatpost diameter 27.2 mm 27.2 mm

Drivetrain7 differences

Groupset brand Shimano

As printed

Shimano Tiagra 4700

microSHIFT

As printed

Microshift RD-M6655

Shifting 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

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

Chainrings 2 1 −1

Gears at the back 10 11 +1

Chainring teeth Shimano Tiagra FC-4700, 24 mm spindle

As printed

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

Bombtrack Lyer forged aluminium, 30 mm spindle

As printed

Bombtrack Lyer forged aluminium, direct mount, 30 mm spindle

Cassette Shimano CS-HG500, 11-34T

As printed

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

Microshift CS-HG113, 11-46T

As printed

Cassette: Microshift CS-HG113, 11-46T

Rear derailleur Shimano Tiagra RD-4700-GS ^{°Value not published by the brand} MICROSHIFT RD-M665M, clutch, medium cage ^{°Value not published by the brand}

Shifters Shimano Tiagra ST-4700 STI 2 x 10 ^{°Value not published by the brand} MICROSHIFT SB-M110 DUAL CONTROL LEVER 1 x 11 ^{°Value not published by the brand}

Brakes

Brakes Mechanical disc

As printed

TRP Spyre C, flat mount, mechanical disc

Mechanical disc

As printed

TRP Spyre C, flat-mount, mechanical disc

Front rotor 160 mm 160 mm

Rear rotor 160 mm 160 mm

Wheels and tyres3 differences

Wheel size 700c / 29"

As printed

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

650b / 27.5"

As printed

WTB Horizon 47-584

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

Tubeless ready yes –

Tyres WTB Byway TCS 34-622

As printed

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

WTB Horizon 47-584

As printed

Tyres: WTB Horizon 47-584

Tyre width fitted 34 mm 47 mm +13 mm

Cockpit and seatpost3 differences

Handlebar Seido CX-10 drop bar, 31.8 mm, 10° flare ^{°Value not published by the brand} BOMBTRACK CX-10 drop bar, 31.8 mm, 10° flare ^{°Value not published by the brand}

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

Seatpost model Seido Beech 27.2 mm x 350 mm ^{°Value not published by the brand} BOMBTRACK BEECH aluminium seatpost, 27.2 mm x 400 mm ^{°Value not published by the brand}

Weight1 difference

Weighed in size L

As printed

size L

As printed

size M

Max total weight 120 kg 120 kg

Mounts and storage

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 Al

Differences measured from

Audax Al · M

Stack and reach

Audax Al · M Audax Al · M — Reach (mm) 390 · Stack (mm) 561

Geometry

Size– M

Reach– 390 mm

Stack– 561 mm

Top tube (effective)– 551 mm

Seat tube– 530 mm

Head tube– 150 mm

Head angle– 72°

Seat angle– 74°

Chainstays– 420 mm

Wheelbase– 1,021 mm

Front centre– 610 mm

Standover– 782 mm

BB drop– 68 mm

Fork offset– 53 mm

Trail– 56 mm

Where to buy them

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

Compare the whole Bombtrack Audax range

Frequently asked questions

Which is lighter, Bombtrack Audax Tiagra Rd-4700-gs or Bombtrack Audax Al?

Bombtrack Audax Tiagra Rd-4700-gs weighs 10.3 kg, Bombtrack Audax Al 10.4 kg, as their brands give them.

What groupset do Bombtrack Audax Tiagra Rd-4700-gs and Bombtrack Audax Al come with?

Bombtrack Audax Tiagra Rd-4700-gs: Shimano Tiagra 4700 2x10. Bombtrack Audax Al: Microshift 11-speed, RD-M6655.

Compare other models

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Bombtrack Audax Tiagra Rd-4700-gs vs Bombtrack Audax Al

At a glance

Prices

Character

Components and specs

Geometry

Stack and reach

Where to buy them

Frequently asked questions

Other comparisons