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2025 Bombtrack

AUDAX EVO

A steel frame endurance bike with high-end components and shimano grx 400 hydraulic disc brakes.
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FrameSteel
ForkCarbon
Wheels650c Aluminum
Drivetrain2 × 12
GroupsetGRX 800, GRX 600
BrakesShimano GRX 400 Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Rider Position
relaxedaggressive
Terrain
smoothrugged
AUDAX EVO
Other Endurance bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

34 mph

AUDAX EVO

39 mph

Similar Bikes

Highest gear

(descending)

Sizing
XS

5'1" – 5'6"

SM

5'4" – 5'9"

MD

5'7" – 6'0"

LG

5'10" – 6'3"

XL

6'0" – 6'5"

🐐 Estimated

Rider Fit Notes

None yet.

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Reviews
BikeRadar
Bombtrack Audax review

Jun 2022 · Warren Rossiter

A study in endurance-bike design from those not constrained by expectations

Highs
  • Luxurious ride quality

  • Thrilling downhiller

  • Very different

Lows
  • Not light

  • Roadie purists won’t approve

  • Very different

Read Review

Geometry
Specs
Build
Frame

4130 double butted crmo, TA, rack / fender mounts, internal light cable routing, rear light mount, 86.5 mm T47 BB shell

BB StandardT47, Threaded

Tire Clearance50c (27.5″) / 35c (700c)

ColorMatt Metallic Steel Teal

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

Bottom Bracket

Seido T47 Pro external sealed BB for 24 mm spindle

Headset

Seido Pro EC sealed external headset, 1.1/2'' - 1.1/8''

Stem

Ritchey Comp 4-Axis 44 forged aluminium stem, -6°

Handlebar

Ritchey Road Comp Streem III drop bar, 31.8 mm, 5° backsweep

Saddle

Seido Course saddle

Seatpost

Ritchey Comp aluminium seatpost 27.2 mm x 400 mm

TypeRigid

Pedals

-

Grips

Bombtrack Command bar tape

Groupset
Rear Derailleur

Shimano GRX RD-RX820

Front Derailleur

Shimano GRX FD-RX820-F

Crank

Shimano GRX FC-RX810-2, 24 mm spindle

Shifters

Shimano GRX ST-RX610 STI 2 x 12

Cassette

Shimano 105 CS-HG710-12 12-speed, 11 - 36 T

Chain

KMC X12 EPT Anti Rust chain, 1/2'' x 11/128''

Brakes

Shimano GRX BR-RX400 hydraulic disc brakes

TypeShimano GRX 400 Hydraulic Disc

Wheels
Rims

Front: Seido Sinus i25, tubeless ready, 32H, Rear: Seido Sinus i25, tubeless ready, 32H

Front Hub

Seido Tau sealed hub, 6-bolt disc

Rear Hub

Seido Tau sealed hub, 11-speed, 6-bolt disc

Tires

Front: WTB BYWAY TCS 650B x 47C, tubeless ready, Rear: WTB Horizon TCS 650B x 47C, tubeless ready

Disc Rotors

Shimano SM-RT66 160 mm rotors

Accessories
Lights

-

Fenders

-

Racks

-

Rider Notes
Riders Also Viewed

First added October 25

Last updated June 7