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BMW changes wheel rims on M4 GT3 after cracks and accidents
BMW Motorsport boss Andreas Roos announced that the team has switched from problematic wheel rims supplied by Rimstock to products from BBS, a German auto parts maker. Rimstock’s bankruptcy last year, along with technical issues encountered in 2023, influenced BMW’s decision to make the change to BBS. Originally, BMW attributed issues with the wheel rims to high stresses at the Nurburgring Nordschleife, but a cracked rim at Oschersleben during last year’s DTM season-opener prompted a reassessment. The plan to introduce BBS-supplied wheel rims in 2025 was accelerated by a year due to the challenges faced, with the new BBS product now ready for use. Roos believes that the previous rim problems are resolved with the new BBS product, which incorporates lessons learned from Rimstock and experience gained in Japan’s Super GT series. BMW had to finalize a post-homologation change with the FIA to bring the new BBS rims to the M4 GT3, a common practice in GT3 racing, and had to adjust wheel mounts accordingly. Customer teams have praised BMW for swiftly addressing the issue and providing a solution within a short timeframe, especially with 40 M4 GT3s sold worldwide over the past three years.
