DUB PF121

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