Echo TR Threaded Cog

- Threaded steel cogs from Echo.
- Made from heat-treated steel for maximum durability.
- Wide base increases the thread contact area to reduce the likelihood of stripping.
- Standard 1.37" x 24tpi threads to fit all fixed rear hubs.
- Compatible with all 1/8" and 3/32" chains.
- 16t cog features holes drilled around the base to save weight.