BOMBTRACK Audax Frameset - Metallic Dark Brown

The Bombtrack Audax Frameset in Metallic Dark Brown is Bombtrack’s classic steel audax platform: a slender Columbus Cromor frame paired with a light full-carbon fork and all the mounts you’d want for long-distance, real-world riding. It’s equally happy going fast on rough roads or going far with light luggage, with modern details like internal light cable routing and an integrated rear light mount.

What’s included

• Frame: Columbus Cromor double butted, TA, rack / fender mounts, internal light cable routing, rear light mount, 86.5 mm T47 BB shell.
• Fork: full carbon, TA, 1 1/2'' – 1 1/8'', with fender and cage mounts.
• Headset: sealed external aheadset, 1 1/2'' – 1 1/8''.
• Thru-axles: 12 × 100 mm (front) / 12 × 142 mm (rear).
• Seat clamp: Bombtrack Prime 29.8 mm.

Use cases

Modern endurance & fast all-road

Built to roll smoothly over a wide range of surfaces, the Audax Frameset is ideal for long mixed-surface rides, endurance road loops and “audax-style” days where comfort and efficiency matter equally.

Year-round practicality

Rack and fender mounts plus lighting integration make it a strong choice for fast commuting, winter road setups, and light touring—without turning the bike into a heavy expedition rig.

Wheel & tyre choices (650B / 700C)

Designed around 650B wheels, it also supports 700C within the stated clearances—so you can tune the ride towards comfort and grip or towards speed and rolling efficiency.

Build info

• BB standard: T47 - 86.5 mm shell width
• Headset standard (S.H.I.S.): EC34 / 28.6 | EC44 / 40
• Headset crown race angle: 36°
• Fork steerer inner diameter: 23.6 mm
• Fork max tire clearance w/o fender: 650B x 50C / 700C x 35C
• Frame max tire clearance w/o fender: 650B x 47C / 700C x 35C
• Maximum chainring clearance 1x: 44 T with 45 mm chainline
• Maximum chainring clearance 2x: 53 / 39 T with 43.5 mm chainline
• Seat post diameter: 27.2 mm
• Seat clamp diameter: 29.8 mm
• Front derailleur clamp diameter: 28.6 mm
• Frame front derailleur compatible: yes
• Brake mount front: FM 140 / 160
• Brake mount rear: FM 140 / 160
• Maximum rotor clearance front: 160 mm
• Maximum rotor clearance rear: 160 mm
• Front through axle: 12 mm x 100 mm, 1.5 thread pitch
• Rear through axle: 12 mm x 142 mm, 1.5 thread pitch
• ISO testing standard: Road
• Bike trailer: approved
• Seat tube mounted child seat: approved
• Derailleur hanger: BT-DH-008
• Frame small parts: BT-CR-007
• Through axle front: BT-TA-F-601
• Through axle rear: BT-TA-R-602

Specifications

• Model: AUDAX
• Color 1: Metallic Dark Brown
• Frame: Columbus Cromor double butted, TA, rack / fender mounts, internal light cable routing, rear light mount, 86.5 mm T47 BB shell
• Fork: Full carbon, TA, 1.1/2'' - 1.1/8'', with fender and cage mounts
• Headset: Sealed external aheadset, 1.1/2'' - 1.1/8''
• Through axle: 12 x 100 mm / 12 x 142 mm
• Seat clamp: Bombtrack Prime 29.8 mm
• Weight frameset: 2410 g frame (size M, incl. TA, hanger) / 530 g fork (300 mm steerer, incl. TA)
• Maximum rider weight: 120 kg incl. luggage
• ASTM riding condition: 2
• Final product may vary in appearance, finish and minor details.

Geometry & size guide

*Size recommendations are indicative and based on rider height only. We can help you interpret geometry and compatibility to define the right build plan.

We can help you choose compatible components and define the most suitable configuration for your project based on this Audax Frameset.

info@bikejamming.it