Campagnolo Super Record 12-Speed Rear Derailleur Pulley Set
Campagnolo recommends their genuine replacement parts for optimal running performance with lower chain noise and protecting your warranty status. The Super Record 12-Speed Rear Derailleur Pulley Set includes the 12T upper and lower pulley wheels you require to maintain your SR12 Rear Derailleur to it's optimal state. The composite pulleys are quite durable, but with enough mileage combined with riding conditions the pulleys will wear. The teeth of the pulleys are pre-shaped for functional reasons, but if you check when performing drivetrain cleaning, over time you will see wear develop.
With the large cassette options available in 12-speed, Campagnolo redesigned both pulleys for the specific requirements of each location, and you can see the tooth profiling on the Upper Pulley is taller and narrower to deliver better chain interaction over a wider cassette cog range. The Lower Pulley retains some of the familiar shorter depth teeth with more mass, as the lower pulley requires less chain hold, but wears faster than the Upper.
You should always you should replace the two pulleys at the same time, and it doesn't hurt at all if this is performed when you change your chain and cassette for overall optimal performance and reduction of uneven wear. With the SR12, Campagnolo outfitted both pulleys with a stainless steel bearing system to for smooth, low friction action and long term durability. This kit provides the two pulleys and all new hardware to replace existing parts. Please note directional arrows on the pulleys for proper installation.
- Premium grade Upper and Lower pulley wheel set for replacing those on Super Record 12 Rear Derailleur
- Composite pulley body material offers great wear with quiet operation
- Both pulley wheels feature steel bearing systems
- 12T Upper pulley has longer tooth profiles ideal for cassettes that have a wide cog tooth ranges
- 12T Lower pulley has shorter teeth with less taper for greater durability, chain stability
- Includes both pulley wheels and all necessary hardware
- Color: Black