CeramicSpeed Replacement Parts|Derailleurs & Parts|OSPW X Pulley Wheel System (Black) (Shimano GRX RX820) (Coated Ceramic Bearings) (2×12 Speed)

CeramicSpeed OSPW X Pulley Wheel System Description:

The CeramicSpeed OSPW X Pulley Wheel System for Shimano GRX RX820 2×12 speed rear derailleurs represents a leap forward in drivetrain efficiency, durability, and looks. The updated injection molded polyamide and carbon fiber cage body is designed to be incredibly stiff and has 4 customizable spring tension settings that will allow for very snappy shifts and improved chain retention. The pulleys feature an attractive 5 spoke anodized aluminum construction, and the oversized profile on both pullies will reduce the angle of the bends on the chain as it glides through the rear derailleur, which will move the chain through the derailleur body faster and reduce drivetrain drag for an energy savings that can be felt in the pedals. These beautiful pulleys roll on hand-built CeramicSpeed coated bearings packed with Grade 3 Silicon Nitride balls that dramatically reduce the parasitic losses usually found in derailleur pulleys, and these bearings will perform better for far longer than a similar in size steel bearing.

Features:

• Injection molded cage crafted from polyamide and carbon fiber reduces weight, improves stiffness for snappier shifting, and increases the overall strength and durability
• Anodized Aluminum 5-spoke 13-tooth upper and 19-tooth lower pulley wheels are lightweight and are rugged
• Hand built CeramicSpeed coated bearings featuring Grade 3 Silicon Nitride balls installed in each pulley for the ultimate reduction of drivetrain drag, long life, and light weight
• Coated bearing races improve bearing service life by increasing hardness of race and reducing corrosion
• 4 customizable spring tension settings to dial in the chain retention and shifting performance of the rear derailleur
• Compatible with Shimano GRX RX820 2×12 rear derailleur (Fits 11-36 Shimano 12spd Cassettes)

Specifications:

• Compatibility: Shimano GRX RX820 2×12 rear derailleur
• Speeds: 12 Speed
• Max Cog: 36T
• Color: Black