Shimano BB-RS501 Hollowtech II English Bottom Bracket. The Shimano BB-RS501 bottom bracket features an enhanced seal construction to provide long-lasting performance and service life.Designed for a perfect fit with Hollowtech II 24mm crank spindles Anodize
Shimano BB-RS501 Hollowtech II English Bottom Bracket. The Shimano BB-RS501 bottom bracket features an enhanced seal construction to provide long-lasting performance and service life.
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