This bike rear derailleur pulley jockey wheel is constructed of CNC 7075 aluminum alloy, lightweight and durable. It is a wonderful accessory for your bicycle.

Features:
Anodized CNC machined construction.
Ceramic bearings.
Fits for 4/5/6mm roller screw axis and most of rear derailleur on the market, support 7/8/9/10 speed.
Anti Rust/Corrosion Resistant Anodized.

Specification:
Product: Bicycle Rear Derailleur Pulley Jockey Wheel
Brand: GANOPPER
Material: 7075 aluminum alloy  Body & Ceramic bearings Ball

Shell: Stainless Shell,Resistant
Color: Black
Size: 10T / 11T / 12T / 13T / 14T / 15T / 16T / 17T (Optional)
Diameter: 41mm(10T)
Package Size: 8 * 6 * 2cm
Package Weight: 9.3g / (10T)

--------------------------------------------------------------

1>7075 Alloy Aluminum Body , Light weight and high hardness

2> Stainless Steel Shell ,compared with nylon shell , nylon shell is easy to break after 100 miles travel

3> 4mm ,5mm alloy bushing , make this rear derailleur pulley fits for 4/5/6mm installment size

4> 8 sizes available (10/11/12/13/14/15/16/17T)

---------------------------------------------------------------------

Package List:
1 *  Mountain Bike Jockey Wheel