Audax
"Fast on tarmac, smooth over broken ground, its broad tyres contain enough air to carry you and your kit comfortably above a range of surfaces."
Bombtrack Audax
This is our premium Audax machine built with Columbus’s Cromor double butted tubing. The svelte diameter tubing offers up images of steel Audax bikes of old but this is no retro machine. It's bang up to date with a tapered head tube, T47 BB, 12 mm through axles, a rear light mount, and even more cargo-carrying options with rack mounts on the frame if you prefer to use panniers. Shimano’s GRX 600 2x groupset provides the shifting and stopping duties with GRX 810 front and rear mechs shifting via sub-compact 2x crankset to keep your cadence silky smooth whatever the route you choose. Luxurious 650 x 47 mm Byway TCS tyres and Ritchey Comp finishing kit provide all-day riding comfort for those long adventures in the saddle.
Frame & Fork
- Color: Metallic dark brown
- Frame: Columbus Cromor double butted, TA, rack / fender mounts, internal light cable routing, rear light mount, ED coating, 86.5 mm T47 BB shell
- Fork: Full carbon, TA, 1.1/2'' - 1.1/8'', with fender / cage mounts
Drivetrain & Shifting
- Shifter: Shimano GRX ST-RX600 STI 2 x 11
- Front derailleur: Shimano GRX FD-RX810-F
- Rear derailleur: Shimano GRX RD-RX810, clutch
- Chain: KMC X11 EPT Anti Rust chain, 1/2'' x 11/128'', 114L
- Cassette: Shimano 105 CS-HG70011 11-speed, 11 - 34 T
- Crankset: Bombtrack Lyer forged aluminium crank, direct mount interface (Sram compatible), 30 mm spindle
- Chainring: Aluminium, subcompact, 48 / 32 T, direct mount spider
- Bottom bracket: Bombtrack T47 internal sealed BB for 30 mm spindle
Wheels & Tires
- Front hub: Bombtrack Tau sealed hub, 6-bolt disc
- Rear hub: Bombtrack Tau sealed hub, 11-speed HG body, 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
- Front tire: WTB Byway TCS 47-584, tubeless ready
- Rear tire: WTB Horizon TCS 47-584, tubeless ready
Cockpit
- 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''
Seats & Seatpost
- Seat: Bombtrack Dart seat
- Seat post: Ritchey Comp aluminium seatpost 27.2 mm x 400 mm
- Seat clamp: Bombtrack Origin 29.8 mm
Brakes
- Brake levers: Shimano GRX ST-RX600 STI hydraulic
- Brakes: Shimano GRX BR-RX400 hydraulic disc brakes
- Rotors: Shimano SM-RT66 160 mm rotors
Weight & Limits
- Complete weight: 10.8 kg (size M)
- Weight frame: 2410 g frame (size M, incl. TA, hanger)
- Weight fork: 530 g fork (300 mm steerer, incl. TA)
- Maximum rider weight: 120 kg incl. luggage
- ASTM riding condition: 2
This is our premium Audax machine built with Columbus’s Cromor double butted tubing. The svelte diameter tubing offers up images of steel Audax bikes of old but this is no retro machine. It's bang up to date with a tapered head tube, T47 BB, 12 mm through axles, a rear light mount, and even more cargo-carrying options with rack mounts on the frame if you prefer to use panniers. Shimano’s GRX 600 2x groupset provides the shifting and stopping duties with GRX 810 front and rear mechs shifting via sub-compact 2x crankset to keep your cadence silky smooth whatever the route you choose. Luxurious 650 x 47 mm Byway TCS tyres and Ritchey Comp finishing kit provide all-day riding comfort for those long adventures in the saddle.
Frame
- BB standard: T47 - 86.5 mm shell width
- Frame max tire clearance w/o fender:
47-584 / 35-622 - Frame front derailleur compatible: yes
- Front derailleur clamp diameter: 28.6 mm
- Brake mount rear: FM 140 / 160
- Maximum rotor clearance rear: 160 mm
- Frame thickness rear brake mount: 10 mm
- Bike trailer: approved
- Seat tube mounted child seat: approved
- ISO testing standard: Road
Fork
- Fork max tire clearance w/o fender:
50-584 / 35-622 - Fork steerer inner diameter: 23.6 mm
- Headset standard (S.H.I.S.):
EC34 / 28.6 | EC44 / 40 - Headset crown race angle: 36°
- Brake mount front: FM 140 / 160
- Maximum rotor clearance front: 160 mm
Drivetrain
- Maximum chainring clearance 1x:
44 T with 45 mm chainline - Maximum chainring clearance 2x:
53 / 39 T with 43.5 mm chainline - Crankarm:
XS 165 mm
S - M 170 mm
L - XL 175 mm - Q Factor: 152 mm
- BCD crank: 104 mm (Sram direct mount compatible spider), 4 bolts
- Chainring offset: small ring 0 mm / big ring -2 mm
- Chainline: 45 mm
Seat & Seatpost
- Seat post diameter: 27.2 mm
- Seat post offset: 0 mm
- Seat post length: 350 mm
- Seat clamp diameter: 29.8 mm
Cockpit
- Stem length:
XS - S 80 mm
M 90 mm
L - XL 100 mm - Stem angle: -6°
- Headset spacers: 1 x 10 mm, 2 x 5 mm
Wheels
- Spoke length front wheel:
272 mm, 274 mm - Spoke length rear wheel:
274 mm, 272 mm - Spoke count (front / rear): 32 / 32
- Front through axle:
12 mm x 100 mm, 1.5 thread pitch - Rear through axle:
12 mm x 142 mm, 1.5 thread pitch - ERD: 570 mm
- Front hub PCD: 58 mm
- Rear hub PCD: 58 mm
- Front hub flange distance / offset:
56.5 mm center to center / 6.6 mm - Rear hub flange distance / offset:
51 mm center to center / 8.8 mm
Spare Parts
- Derailleur hanger: BT-DH-008
- Frame small parts: BT-CR-007
- Hub end caps front: BT-HC-014
- Hub end caps rear: BT-HC-017
- Cassette body: BT-CB-006
- Crankarm bolt: BT-CRP-002
- Through axle front: BT-TA-F-601
- Through axle rear: BT-TA-R-602
