The standard of the industry.
They come in 16, 17 & 18 tooth sizes, and work with either 3/32" or 1/8" chains.
These have standard 1.37" x 24 tpi threads.
| Option | Manufacturer's Part Number | Store SKU |
|---|---|---|
| 16 tooth, 3/32 (FW106) | FW1205 | FW106 |
| 17 tooth, 3/32 (FW107) | FW1207 | FW107 |
| 18 tooth, 3/32 (FW108) | FW1209 | FW108 |