Features:
SELECTED STRENGTH MATERIAL: Steel bearing is high strength and smooth, which ensures fast and sensitive working. Main body is made of aluminum alloy, wear-resistant, anti-rust and lightweight.
WITH ADAPTERS: Solid casting and fine machining, comes with a 4mm and 5mm adapters, suitable for various bikes.
Compatible with MOST BIKE: Bike jockey wheel apply for most of the rear derailleur on the market, 12T is compatible with the most, support for 9/10/11 speed bikes.
SAVE EFFORT: Light weight, no extra burden on the . With this pulley, you can save more time during long rides, especially uphill.
NOTE: If please exactly the same size with the original pulley. If no totally same, choose the smaller type, never choose the bigger than original ones.

Specification:
Color: Black, Red (Optional)
Material: aluminum alloy
Diameter: 50mm/2in
Weight: Approx. 20g

Package List:
1 x Pulley wheel
2 x Adapters