Audax EVO
"The bike is made to go further, eveything is carefully considered when looking at the spec - the Seido Banjo fork with internal dynamo routing and lowrider rack mounts, 6 bolt disc hubs, a Shimano GRX 2 x 12 drivetrain"
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.
Frame & Fork
- Color: Matt metallic steel teal
- Frame: 4130 double butted crmo, TA, rack / fender mounts, internal light cable routing, rear light mount, ED coating, 86.5 mm T47 BB shell
- Fork: Seido Banjo full carbon, TA, 1.1/2'' - 1.1/8'', 180 mm max rotor size, lowrider rack compatible, internal hub dynamo cable routing
Drivetrain & Shifting
- Shifter: Shimano GRX ST-RX610 STI 2 x 12
- Front derailleur: Shimano GRX FD-RX820-F
- Rear derailleur: Shimano GRX RD-RX820
- Chain: KMC X12 EPT Anti Rust chain, 1/2'' x 11/128''
- Cassette: Shimano 105 CS-HG710-12 12-speed, 11 - 36 T
- Crankset: Shimano GRX FC-RX810-2, 24 mm spindle
- Chainring: Shimano GRX, 46 T / 30 T
- Bottom bracket: Seido T47 Pro external sealed BB for 24 mm spindle
Wheels & Tires
- Front hub: Seido Tau sealed hub, 6-bolt disc
- Rear hub: Seido Tau sealed hub, 11-speed HG body, 6-bolt disc
- Through axles: 12 x 100 mm / 12 x 142 mm
- Front rim: Seido Sinus i25, tubeless ready, 32H
- Rear rim: Seido Sinus i25, tubeless ready, 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: Seido Pro EC sealed external headset, 1.1/2'' - 1.1/8''
Seats & Seatpost
- Seat: Seido Course 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-RX610 STI hydraulic
- Brakes: Shimano GRX BR-RX400 hydraulic disc brakes
- Rotors: Shimano SM-RT66 160 mm rotors
Weight & Limits
- Complete weight: 10.5 kg (size M)
- Weight frame: 2410 g frame (size M, incl. TA, hanger)
- Weight fork: 500 g fork (300 mm steerer, incl. TA)
- Maximum rider weight: 120 kg incl. luggage
- ASTM riding condition: 2
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.
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
