Parts 8/9/10/11 Speed 11T/12T/13T Freewheel Flywheel Pinion For Bike Cassette Cog In Mountainous Region And Highway

Parts 8/9/10/11 Speed 11T/12T/13T Freewheel Flywheel Pinion for Bike Cassette Cog in Mountainous Region and Highway
Specification:
Is it difficult to change the speed of ? Do you feel that it's hard to ride your bike? It is time to change the chain. Our chain is easy to install and fine workmanship. You won't be disappointed. Features:
The is waterproofing.
Compatible with mid or cage derailleur.
Suitable for highway or mountains.
The shape of cogs are specially designed for shifting performances.
Made of fine material. Specifications:
Material: aluminum
Color: silver
Species: 8s 11T, 8s 12T, 8s 13T, 9s 11T, 9s 12T, 9s 13T, 10s 11T, 10s 12T, 10s 13T, 11s 11T, 11s 12T, 11s 13T optional
Item size:
8s 11T / 9s 11T / 10s 11T / 11s 11T: 4.20 x 4.20 x 0.55cm / 1.65 x 1.65 x 0.22in
8s 12T / 9s 12T / 10s 12T / 11s 12T: 4.40 x 4.40 x 0.38cm / 1.73 x 1.73 x 0.15in
8s 13T / 9s 13T / 10s 13T / 11s 13T: 5.30 x 5.30 x 0.44cm / 2.09 x 2.09 x 0.17in
Item weight:
8s 11T / 9s 11T / 10s 11T / 11s 11T: 10g / 0.35oz
8s 12T / 9s 12T / 10s 12T / 11s 12T: 11g / 0.39oz
8s 13T / 9s 13T / 10s 13T / 11s 13T: 15g / 0.53oz
Package size: 8 x 6 x 1cm / 3.15 x 2.36 x 0.39in
Package weight:
8s 11T / 9s 11T / 10s 11T / 11s 11T: 10g / 0.35oz
8s 12T / 9s 12T / 10s 12T / 11s 12T: 11g / 0.39oz
8s 13T / 9s 13T / 10s 13T / 11s 13T: 15g / 0.53oz Package list:
1 x Cassette cog

Package List:
1 x Cassette cog