ENDURO BEARINGS Derailleur pulleys - directline xd-15 - shimano dura ace - 12 speed - graphite

Upgrade your cycling performance with these high-quality machined Delrin derailleur pulleys, featuring XD-15 Ceramic-Hybrid radial bearings for superior shifting and durability. Designed specifically for 12-speed Shimano Dura Ace derailleurs, these pulleys include 11 teeth and a 5mm bolt hole for easy installation. The precision-machined Delrin material offers high tensile strength, rigidity, natural lubricity, and excellent resistance to moisture, chemicals, and UV rays, ensuring long-lasting smooth operation. Thanks to the Teflon-infused Delrin, friction is significantly reduced compared to aluminum or titanium pulleys, providing a smoother ride. The exclusive XD-15 ceramic-hybrid bearings combine corrosion-resistant, cryogenically treated nitrogen steel races with Grade 5 Silicon Nitride ceramic balls, delivering unmatched high-performance and longevity. Deep-groove raceways allow for larger ceramic balls, enhancing contact area and durability. The grease used is 90% filled Kluber NBU52, which improves with time, resisting washout and sticking to the balls for consistent performance. Proudly manufactured in the USA, these derailleur pulleys are the ultimate upgrade for serious cyclists seeking precision, durability, and smooth shifting.