Shimano SM-HB20 Centerlock Rotor Lockring - Black
For centrelock wheels & wheelsets that use 12mm, 15mm and 20mm thru axles.
- Tightens using 16 notch Hollowtech II BB tool
- Genuine Shimano replacement part
- Centerlock rotor lockring for centre lock hubs
- Part number: SM-HB20