The R4302 brake disc is a replacement disc produced by PLANT LLC for trailer axles of the Schmitz Rotos type, serving as a direct substitute for the original part with OE reference 017870. It is cast from grey cast iron grade SCh-20, a material chosen for its stable friction behaviour and resistance to thermal cracking under repeated heavy braking, and the finished disc weighs about 35 kg with a nominal size of 430 mm.
To protect the non-friction surfaces against corrosion during storage and service, the disc is finished with a cataphoretic (e-coat) coating. PLANT LLC is a full-cycle manufacturing company based in Miass, Russia, with more than 25 years of experience producing spare parts for URAL trucks, commercial vehicles and trailer equipment.
The plant keeps over 3,000 items in stock at its own warehouse, applies multi-stage quality control from incoming raw materials to the finished product, and backs its output with certificates of conformity and a factory warranty. Because the company sells directly from the factory, buyers avoid intermediary mark-ups, and PLANT regularly ships to customers across Russia, Kazakhstan, Belarus and other CIS countries.
The R4302 disc is listed as in stock on the manufacturer's website, making it a practical sourcing option for fleets running Schmitz semi-trailers that need reliable, factory-made brake components.
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