![40-Series Upper, IS42/28.6 (Tall) Black 40-Series Upper, IS42/28.6 (Tall) Black](https://cdn11.bigcommerce.com/s-rwox88pq5a/images/stencil/300x300/products/140437/130056/dc1756__75916.1637352795.jpg?c=1)
Converts IS disc mounts to a fixed Singlespeed\n Also compatible with XD 1'er (GU1811) as replacement cogs\n CrMo cog fits 3/32" chains.
- model:
- 110-Series upper
- S.H.I.S.:
- IS42/28.6
- upper/lower:
- upper
- stack:
- 15mm