These units are designed for 73mm shell rather than 68mm. We find it's OK to use them in a 68 shell, it just means the LH cup protrudes 4 or 5 mm - this is all we can get now in an ISIS BB unit
- ISIS drive splined BB
- High-performance,quiet,smooth-turning
- Sealed bearing
- Cold-forged steel cups
- Axle: Hollow Cr-M
- Finish: Phosphated Sheath and cups
- Weight: 291g