The Audax is built for long days on mixed roads, pairing a Columbus Cromor steel frame with a full-carbon fork and generous 650B × 47 mm tyres. Rack and mudguard mounts add touring versatility, while the tapered head tube, through-axles and T47 bottom bracket bring modern standards to its slender steel silhouette.
Shimano GRX 2 × 11 shifting combines with 48/32T chainrings and an 11–34T cassette. Hydraulic disc brakes and Ritchey finishing components support comfortable distance riding. The listed build uses a WTB Byway front tyre and WTB Horizon rear tyre.
Specifications
| 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 / cage mounts |
| Handlebar | Ritchey Road Comp Streem III drop bar, 31.8 mm, 5° backsweep |
| Grips | Bombtrack Command bar tape |
| Stem | Ritchey Comp 4-Axis 44 forged aluminium stem, -6° |
| Headset | Sealed external aheadset, 1.1/2'' - 1.1/8'' |
| Brake levers | Shimano GRX ST-RX600 STI hydraulic |
| Shifter | Shimano GRX ST-RX600 STI 2 x 11 |
| Brakes | Shimano GRX BR-RX400 hydraulic disc brakes |
| Rotors | Shimano SM-RT66 160 mm rotors |
| Crankset | Bombtrack Lyer forged aluminium crank, direct mount interface (SRAM compatible),30 mm spindle |
| Bottom bracket | Bombtrack T47 internal sealed BB for 30 mm spindle |
| Pedals | Not included |
| Chain | KMC X11 EPT Anti Rust chain, 1/2'' x 11/128'', 114L |
| Chainring | Aluminium, subcompact, 48 / 32 T, direct mount spider |
| Cassette | Shimano 105 CS-HG70011 11-speed, 11 - 34 T |
| Front derailleur | Shimano GRX FD-RX810-F |
| Rear derailleur | Shimano GRX RD-RX810, clutch |
| Front hub | Bombtrack Tau sealed hub, 6-bolt disc |
| Rear hub | Bombtrack Tau sealed hub, 11-speed, 6-bolt disc |
| Through-axles | 12 x 100 mm / 12 x 142 mm |
| Front rim | WTB ST i25 double wall, TCS 2.0, 32h |
| Rear rim | WTB ST i25 double wall, TCS 2.0, 32h |
| Saddle | Bombtrack Dart saddle |
| Seat post | Ritchey Comp aluminium seatpost 27.2 mm x 400 mm |
| Seat clamp | Bombtrack Origin 29.8 mm |
| Front tyre | WTB BYWAY TCS 650B x 47C, tubeless ready |
| Rear tyre | WTB Horizon TCS 650B x 47C , tubeless ready |
| Complete weight | 10.8 kg (size M) |
| Frameset weight | 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 |
Specifications describe the listed build. Appearance, finish and minor component details may vary.
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