Features： 1、Steel Plate Material: Adopts high tension steel plate with nickel chromium plating and multi layer electroplating anti rust treatment, ensuring a long term use. 2、Fine Workmanship: High accuracy gear ratio makes gear shifting more fluent, also has hollow punching design to reduce dead weight, improving your using experience. 3、Parameter Description: Cassette cogs is 11‑13‑15‑17‑19‑21‑24‑30T, 8 speed type. Has strong compatibility for road bikes and folding bicycles, sutable for most models. 4、Fluent Running: Has fluent rotation without too much noise, having close connection with the bike hub, stable running for your satisfying feelings. 5、Little Burden: Nickel chrome steel material makes the freewheel has a weight of 339g/12.0oz, will not increase riding burden or cause additional energy waste. Specification： Item Type: Bicycle Freewheel Material: Nickel Chrome Steel Color: As Picture Shown Application: For Road Bike, Folding Bicycle Gross Weight: Approx.339g/12.0oz Speed Ratio: 8 Speed, 11-13-15-17-19-21-24-30T Package List： 1 x Freewheel 2 x Tooth Piece 1 x Flywheel Lock Cover