DUB PF121

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The SRAM DUB PF121 bottom bracket brings the durability and simplicity of DUB™ technology to fat bikes using a PF121 shell. With a wider, stiffer interface and improved sealing, it delivers smooth performance and long‑lasting protection against dirt, water, and winter conditions. PressFit bottom bracket for PF121 fat bike frames Designed for all SRAM DUB cranks with a 28.99 mm spindle 121 mm shell width with 41 mm cup diameter Durable steel bearings for consistent performance Enhanced sealing to protect against contamination Show more