81.50803.0031 / 1387439 Brake Disc: The 432 mm European Workhorse
81.50803.0031 / 1387439 is the 432 mm European workhorse brake disc for MAN and DAF trucks — a core rotor in EU truck service. MAN and DAF hold major shares of the EU heavy truck fleet, and the 432 mm ventilated rotor is the standard front-axle disc for their flagship tractor models.
Specification Snapshot
- Diameter: 432 mm — the European heavy-truck standard rotor size.
- Fitment: MAN TGX / TGS and DAF XF / CF series front axles with air disc brakes.
- OE references: 81.50803.0031 (MAN) and 1387439 (DAF).
Price Advantage vs European Retail
SAITE supplies the 432 mm rotor at FOB prices of $25–50 per piece, versus €29–42 at typical European retail — and at these volumes the difference stacks up fast on a fleet or distributor program. Every disc is cast and machined to the OE blueprint, with dimensional and hardness test certificates included.
Why Fleets Choose SAITE Rotors
- OE-grade metallurgy: grey iron casting with correct vanes and friction surface finish for stable braking and even pad wear.
- Full documentation: dimension report, hardness test and photos per batch.
- Container-ready logistics: palletized and export-packed from Huangshi, China.
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SAITE Friction is an ISO 9001 / IATF 16949 certified friction material manufacturer in Huangshi, China, supplying OEM-quality heavy-duty brake parts worldwide. Get factory-direct pricing with ECE R90 documentation.