CeramicSpeed Preload Ring for SRAM DUB 

Internal O-ring to provide secure fitment on crank spindle without needing glue. The Metal threads ensures correct preload adjustment, and the sleek design reduces areas for dirt to collect. 

About the spare part:

• Compatible with all DUB Crank + BB combinations
• Comes with 1mm + 3mm spacers that match the outer diameter for a clean and tidy look, regardless of current BB