The Bombtrack Audax AL Frameset in Matt Black is an aluminium all-road / audax platform designed for long miles, mixed surfaces and fast, light travel. A 6061-T6 double-butted aluminium frame with a T47 bottom bracket shell and a dedicated full-carbon fork create a responsive, efficient chassis that still leaves room for high-volume tyres and comfort on rougher roads.
What’s included in the frameset
- Frame: 6061-T6 double-butted aluminium, TA, fender mounts, 86.5 mm T47 bottom bracket shell.
- Fork: full carbon, TA, 1.5" – 1 1/8" tapered steerer, with fender and cage mounts.
- Headset: sealed integrated aheadset, 1.5" – 1 1/8".
- Thru-axles: 12 × 100 mm (front) / 12 × 142 mm (rear).
- Seat clamp: Bombtrack Prime 31.8 mm.
Use cases & configuration options
Modern audax & fast all-road
The Audax AL is conceived as a modern audax / all-road frame, suited to the way many riders actually ride: a blend of tarmac, rough roads, gravel and light off-road. Its rapid geometry with short chainstays and an engaged front end keeps the handling lively and precise, even when you add lightweight bags.
Light touring & everyday speed
With mounts for fenders and cages on the fork, the Audax AL works very well as a light touring or fast commuting platform. Within the frame and fork clearances you can choose 650B wheels with high-volume tyres or 700C for more speed on paved and compact surfaces.
One bike for long mixed-surface rides
If you’re looking for a single bike to cover audax rides, endurance road and rough back lanes, the Audax AL offers a convincing balance between efficiency and control. By selecting wheels, drivetrain and cockpit in line with its standards, you can build a bike tailored to long mixed-surface rides and modern audax events.
Compatibility & build infos
- BB standard: T47 – 86.5 mm shell width.
- Headset standard (S.H.I.S.): IS42 / 28.6 (upper) | IS52 / 40 (lower).
- Crown race angle: 36°.
- Fork steerer I.D.: 23.6 mm.
- Fork max tyre clearance (without fenders): 650B × 50C / 700C × 35C.
- Frame max tyre clearance (without fenders): 650B × 50C / 700C × 35C.
- Max chainring 1x: 42 T with 45 mm chainline.
- Max chainring 2x: 50 / 34 T with 43.5 mm chainline.
- Seatpost diameter: 27.2 mm.
- Seat clamp diameter: 31.8 mm.
- Front derailleur clamp diameter: integrated FD hanger.
- Front derailleur compatible: yes.
- Brake mount front: FM 140 / 160.
- Brake mount rear: FM 140 / 160.
- Max rotor front: 160 mm.
- Max rotor rear: 160 mm.
- Front thru-axle: 12 × 100 mm, 1.5 thread pitch.
- Rear thru-axle: 12 × 142 mm, 1.5 thread pitch.
- ISO testing standard: Road.
- Bike trailer: approved.
- Seat tube mounted child seat: not approved.
- Derailleur hanger: BT-DH-018.
- Frame small parts: BT-CR-013.
- Front thru-axle: BT-TA-F-601.
- Rear thru-axle: BT-TA-R-601.
Technical specifications – frame & fork
- Model: Audax AL Frameset.
- Color offered by Bikejamming: Matt Black.
- Frame: 6061-T6 double-butted aluminium, TA, fender mounts, 86.5 mm T47 BB shell.
- Fork: full carbon, TA, 1.5" – 1 1/8" tapered steerer, with fender and cage mounts.
- Headset: sealed integrated aheadset, 1.5" – 1 1/8".
- Thru-axles: 12 × 100 mm front / 12 × 142 mm rear.
- Seat clamp: Bombtrack Prime 31.8 mm.
- Frameset weight: 1810 g frame (size M, incl. TA & hanger) / 530 g fork (300 mm steerer, incl. TA).
- Max rider + luggage weight: 120 kg.
- ASTM riding condition: 2.
- Final product appearance, finish and minor details may vary.
Geometry & size guide
| Size | XS | S | M | L | XL |
| Wheel size |
650B |
650B |
650B |
650B |
650B |
| Seat tube length |
470 |
500 |
530 |
560 |
590 |
| Horizontal TT length |
505 |
527 |
551 |
569 |
592 |
| Seat angle |
75.0° |
74.5° |
74.0° |
74.0° |
73.5° |
| Head angle |
71.0° |
72.0° |
72.0° |
72.0° |
72.0° |
| Headtube length |
100 |
120 |
150 |
180 |
205 |
| BB drop |
70 |
68 |
68 |
65 |
65 |
| Chainstay length |
420 |
420 |
420 |
420 |
420 |
| Fork offset |
51 |
51 |
51 |
51 |
51 |
| Trail |
64 |
58 |
58 |
58 |
58 |
| Wheelbase length |
989 |
998 |
1019 |
1039 |
1057 |
| Standover |
728 |
754 |
782 |
812 |
838 |
| Reach |
368 |
379 |
390 |
401 |
411 |
| Stack |
512 |
533 |
561 |
587 |
611 |
| Front center |
579 |
588 |
608 |
628 |
645 |
| Axle to crown |
385 |
385 |
385 |
385 |
385 |
| Min rider height |
150 cm |
160 cm |
170 cm |
179 cm |
188 cm |
| Max rider height |
161 cm |
171 cm |
181 cm |
190 cm |
199 cm |
Size recommendations are indicative and based on rider height only. If you are planning a build around the Audax AL Frameset, we can help you interpret its geometry and technical standards to choose a configuration that fits your project: info@bikejamming.it.
We can help you identify compatible components and define the most suitable configuration for your build project based on the Audax AL Frameset.
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