Enduro Bearings jockey wheel 11 teeth for Shimano Dura Ace 11 gears Black

Designed and manufactured for performance, these pulleys feature CN bearings (tight clearance) in the upper pulley to maximize gear shift accuracy and C4 bearings (loose clearance) in the lower pulley to allow movement of the chain line. The material of the Delrin 500 AF pulleys is characterized by high mechanical tensile strength and rigidity, natural lubrication, high resistance to moisture, caustic chemicals and UV, which makes these pulleys very durable, rigid and very smooth. Delrin is also very clean and precise. The inherent lubricating qualities of this Teflon-infused material greatly reduce friction when in contact with the bikeu2019s chain. Compared to other pulley materials, the Delrin 500 AF with Teflon offers significantly lower strength than machined aluminum or titanium pulleys. Enduro Zero Ceramic-bearingsHybrid Bearings are composed of high carbon chrome alloy 52100 black oxide coated rings and grade 5 silicon nitride ceramic balls with a water-proof high pressure grease filled to 90%. Si3N4 ceramic balls reduce bearing wear and increase bearing life by eliminating steel-to-steel contact inside the bearing. The black oxide and magnetite treatment of the rings provides an additional level of corrosion resistance and extends the life without worry. Eleven-tooth size and profile, 4mm bolt hole top pulley and 5mm bolt hole bottom pulley are designed to improve most 11-speed SRAM derailleur. The derailleur pulleys.Enduro are available in a number of configurations and performance levels, starting with Ceramic-Hybrid, Black-Oxide treated Zero Ceramic as the top step, and XD-15 Ceramic-Hybrid at the top of the range. All are proudly manufactured with precision in the USA.Main features :Ceramic-hybrid bearings XD-15: Rings made of cryogenically treated nitrided steel, 100% stainless.Kluber NBU52 90% grease, adherent and resistant to washing, which improves over time.90% water-resistant high pressure grease filling for long lasting protection.Optimized shift accuracy: CN bearing (tight play) and C4 (loose play).High performance materials: pulleys machined in 500AF Derlin infused with Teflon: High performance material: high rigidity, low friction, resistance to moisture, chemicals and UV. Precision machining for perfect fit and smoother transmission. Much more efficient than aluminium or titanium pulleys in terms of drag reduction.Precision manufacturing in the USA.Features : Jockey wheel size: 11 teethMaterial of jockey wheel : Machined in the USACeramic balls: Level 5Compatibility: Shimano Dura Ace 11-speed