- XD-15 Ceramic bearings provide superior smoothness, reduced weight and extended bearing life
- Grade 3 Silicon Nitride ceramic balls, Chromium steel races with triple cryogenic treatment, filled with Kyodo Yushi grease for ceramic bearings
- Super light Delrin wheels with aluminum dust covers
- AB0025: Pulleys for 11 speed Shimano Derailleurs
- AB0029: Designed as an upgrade for most 11 speed Shimano Dura Ace and Ultegra derailleurs
- Sold as pair (16g/pair)
- 3rd party web sales (eBay, Amazon, etc.) are strictly prohibited by the manufacturer
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