Bombtrack AUDAX EVO

The Audax EVO is a refined steel allroad bike built for endurance, versatility, and long-distance comfort. Its double-butted chromoly frame features a tapered head tube for precise handling and an integrated rear light mount for low-light visibility. Up front, the Seido Banjo carbon fork offers internal hub dynamo cable routing and front rack compatibility - perfect for bikepacking or randonneuring.

The Shimano GRX 610 2 x 12 hydraulic groupset delivers smooth, reliable shifting and confident braking on mixed terrain. Tubeless-ready Seido Sinus rims paired with a WTB Byway / Horizon tire combo provide efficient rolling and all-day comfort.

With Seido Tau hubs and 12 mm thru-axles for added stability, the Audax EVO is your go-anywhere, ride-all-day machine - engineered for adventure, designed for control, and ready for the road ahead.

Specification

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: 45°
Brake mount front: FM 160 / 180
Maximum rotor clearance front: 180 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: 151 mm
BCD crank: 110 mm / 80 mm, asymmetric Shimano 4 bolts
Chainring offset: 0 mm
Chainline: 47 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 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: 551 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
Through axle front: BT-TA-F-601
Through axle rear: BT-TA-R-602

Geometry