Item Descriptions:
-High-Quality Construction: Our single speed cog is skillfully crafted using heat treatment strengthened No. 45 steel, ensuring exceptional durability and resistance to corrosion, you can rely on its performance and longevity.
-FINE WORKMANSHIP: Light weight will not bring extra burden to the bicycle.
-Smooth and Quiet Operation: Experience a seamless and noise-free riding experience with our steel bicycle flywheel sprocket. Designed for fluent turning.
-Convenient: We have equipped our product with a fixing ring, making it incredibly easy to install and use. You won't need to worry about finding specific accessories to pair with it.
-Please confirm carefully the size you need; the size is measured manually and there may be a slight error.

Package:
1X 17T/18T Single Speed Freewheel
1XLock Ring

Item Specifications:
Material:Heat treatment strengthened No. 45 steel
Size:17T/18T
Surface treatment:electroplating
Inner diameter:33.8mm
Outer diameter:78mm/74mm
Tooth thickness:2.6mm/2.8mm
Total thickness:7.4mm