Trailing Arm for BMW 3 Series: Carbon Fibre Composite
This trailing arm for the BMW 3 Series is specified around carbon fibre composite, which decides how it behaves in service far more than the part name does. We build to a written specification — base material, dimensions, finish and packing — and hold that specification on file so every reorder reproduces the approved piece.
The usual reason a programme changes supplier is not unit price. It is a specification nobody had written down, or lead time that slipped twice before bulk started. Both are specification problems, and both are preventable.
Specification
| Product | Trailing Arm |
|---|---|
| Vehicle application | BMW 3 Series |
| Material / finish | Carbon Fibre Composite |
| Typical use | Motocross |
| MOQ | 1,000 pieces per specification |
| Sampling | 10 working days, 3 days per revision |
| Bulk lead time | 15-30 days after approval |
| Compliance | ISO 9001 |
| Packing | 10 pieces per inner box, 200 per carton |
Material options
- Sintered Metal — used when the finish has to hold a coating
- Aluminium Alloy — selected when the part is exposed to weather and road salt
- Carbon Steel — selected when the part is exposed to weather and road salt
- PVC Coated Fabric — specified where the part sits close to a heat source
- Silicone — used when the finish has to hold a coating
Processes available
- laser cutting
- CNC machining
- shot blasting
- gravity casting
- sintering
- electroplating
Fitment notes
Check whether the mounting points on your market version match the catalogue drawing — regional variants are the usual cause of a wrong first order.
Where it is used
The specification above is the one most often ordered for motocross. Related applications include off-road trails, delivery fleets, urban courier work, coastal delivery, mountain roads.
Quality and packing
- In-line inspection with AQL 2.5 sampling on every lot.
- Dimensional report issued against the approved drawing.
- Carton marking and barcode to your specification.
- Golden sample retained at the factory as the reorder reference.
Questions buyers ask
How long does sampling take?
Samples leave the factory in 10 working days, and each revision round adds about 3 days once you have seen the first piece.
Can you match an existing sample?
Send a sample and we will reverse-engineer the specification, then produce a counter sample for approval before any bulk starts.
What testing is included?
Standard lots ship with dimensional and hardness reports. ISO 9001 documentation is issued with the shipment when your market requires it.
Do you handle mixed containers?
Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 1000 pieces per line.
Send the specification you are working to and we will confirm what we can match, what we would change and why.
