AUDAX

This is our premium Audax machine built with Columbus’s Cromor double butted tubing. The svelte diameter tubing offers up images of the 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.

METALLIC DARK BROWN

HIGHLIGHTS

FRAME

Double butted crmo frame with tapered head tube and rear light mount.
FORK

Full carbon fork with bottle cage mounts.
DRIVETRAIN

Shimano GRX 600 2 x 11 hydraulic group with GRX 810 clutched rear derailleur.
CRANKSET

Bombtrack Lyer crank with 48 / 32 T subcompact chainrings.
HUBS

Bombtrack Tau disc brake hubs with 12 mm through axles.
WHEELS

Tubeless ready WTB STi25 650B rims with WTB Byway / Horizon tire combination.

"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."

SPECIFICATIONS

Model	AUDAX
Color 1	Metallic Dark Brown
Color 2	-
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''
Levers	Shimano GRX ST-RX600 STI hydraulic
Shifter	Shimano GRX ST-RX600 STI 2 x 11
Brakes	Shimano GRX BR-RX400 hydraulic disc brakes
Rotor	Shimano SM-RT66 160 mm rotors
Crankset	Bombtrack Lyer forged aluminium crank, direct mount interface (Sram compatible),30 mm spindle
BB	Bombtrack T47 internal sealed BB for 30 mm spindle
Pedals	-
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 axle	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 tire	WTB BYWAY TCS 650B x 47C, tubeless ready
Rear tire	WTB Horizon TCS 650B x 47C , tubeless ready
Fender	-
Rack	-
Kickstand	-
Light	-
Weight	10.8 kg (size M)
Weight frameset	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

Final product may vary in appearance, finish and minor details.

BUILD INFOS

Model	AUDAX
BB standard	T47 - 86.5 mm shell width
Headset standard (S.H.I.S.)	EC34 / 28.6 \| EC44 / 40
Headset crown race angle	36°
Fork steerer inner diameter	23.6 mm
Fork max tire clearance w/o fender	650B x 50C / 700C x 35C
Frame max tire clearance w/o fender	650B x 47C / 700C x 35C
Maximum chainring clearance 1x	44 T with 45 mm chainline
Maximum chainring clearance 2x	53 / 39 T with 43.5 mm chainline
Seat post diameter	27.2 mm
Seat clamp diameter	29.8 mm
Front derailleur clamp diameter	28.6 mm
Frame front derailleur compatible	yes
Brake mount front	FM 140 / 160
Brake mount rear	FM 140 / 160
Maximum rotor clearance front	160 mm
Maximum rotor clearance rear	160 mm
Front through axle	12 mm x 100 mm, 1.5 thread pitch
Rear through axle	12 mm x 142 mm, 1.5 thread pitch
ISO testing standard	Road
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
Spoke length front wheel	272 mm, 274 mm
Spoke length rear wheel	274 mm, 272 mm
Spoke count (front / rear)	32 / 32
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
Stem length	XS - S 80 mm / M 90 mm / L - XL 100 mm
Stem angle	-7°
Headset spacers	1 x 10 mm, 2 x 5 mm
Seat post offset	0 mm
Seat post length	350 mm
Bike trailer	approved
Seat tube mounted child seat	approved
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

GEOMETRY

FRAME GEOMETRY

Model	AUDAX
Bike Size	XS	S	M	L	XL
Wheel size	650B	650B	650B	650B	650B
Seat Tube Length	470	490	520	550	580
Horizontal TT length	509	526	547	565	588
Seat Angle	74.5°	74.5°	74.0°	74.0°	73.5°
Head Angle	71.5°	71.5°	72.0°	72.0°	72.0°
Headtube Length	110	130	150	170	190
BB Drop	68	68	68	65	65
Chainstay Length	420	420	420	420	420
Fork Offset	53	53	53	53	53
Trail	59	59	56	56	56
Wheelbase Length	987	1005	1018	1037	1055
Standover	746	765	794	818	841
Reach	361	373	383	396	408
Stack	534	553	571	590	609
Front Center	577	595	607	626	643
Axle to Crown	385	385	385	385	385
Minimum rider height	1500	1600	1700	1790	1880
Maximum rider height	1610	1710	1810	1900	1990

¹ Our bike size recommendation generally represents a rough guideline for quickly narrowing down the sizes from which to choose based on the body height. Bike fitting is a complex topic and other measurements and factors have to be accounted for as well. Since no two human bodys are exactly the same it is not possible to give a 100% correct advice for everyone. Therefore Bombtrack cannot guarantee for the stated recommendations to be correct for every individual customer. The best way to work out the correct size is to consult a local Bombtrack dealer or a professional bike fitter and have them determine the needed size.

HANDLEBAR GEOMETRY

Model	AUDAX
Bike Size	XS	S	M	L	XL
Handlebar type	Dropbar	Dropbar	Dropbar	Dropbar	Dropbar
Width (drops)	400	420	420	440	440
Width (barends)	446	429	429	449	449
Reach	75	73	73	73	73
Flare	10°	2°	2°	2°	2°
Backsweep	-	4.7°	4.7°	4.7°	4.7°
Drop	116	128	128	128	128
Upsweep	-	-	-	-	-
Rise	-	-	-	-	-