12T 13T 14T Single Speed Cassette Cog MTB Freewheel Bike Sprocket
£12.75
Specification: 12T 13T 14T. The flywheel is made of high-resistant stainless steel, whose strength and hardness are twice that of ordinary 316 stainless steel, and the hardness reaches 18 degrees. Type: Single Speed Conversion Kit.
