Description
Stainless Steel bearings are made from heat hardened 440C stainless stock. They are technically referred to as corrosion resistant after hardening. They will give excellent resistance to corrosion and last just as long as standard bearing steel as far as wear resistance. Ceramic balls offer much less rolling resistance for longer casts and long life.
Shimano cross reference:
| RD2401 |
| RD6521 |
| RD6524 |
| RD11018 |



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