Blackspire Stinger BB Mount
- For use with Shimano FD-M970-E/FD-M770-E E-type Front Derailleurs
- Lightweight
- Works with almost any Bashring
- Molded Stepped Roller
- Fits up to 40t chainrings
- INTENDED USE: All-Mountain & FreeRiding
- Size(s): ISCG, ISCG’05, BB-Mount
- Color(s): Anodized Black back plate with colored roller
- Weight: 90g
- These units only work with e type front derailleurs.