- The Shimano SM-HB20 locking ring is only suitable for 15- or 20mm front wheel thru axles.
- To be used when installing Center Lock disc rotors.
- Center Lock ring for fixing the disc rotor.
- For hubs with thru axle 15mm and 20mm.
- Supplied as 1 Shimano SM-HB20 Center Lock Lockring incl washer
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