From the Manufacturer

- Convert any normal HG freehub wheel into a Singlespeed drive

- CrMo cog with 7mm thick Hyperglide-spline, 1.8mm tooth thickness

- Range of different sized aluminum spacers for fine tuning chainline

- Includes 13t cog, alloy lockring, and 7 spacers: 2) 10mm, 1) 5mm, 4) 3mm

Specifications

• Mfc Part No: 40201
• model: single speed kit
• hub: HG (8-11sp)
• teeth: 13
• chain: 3/32"
• ean: 4717480157228
• sku: RV6701