Disc rotor Shimano SM-RT30-L 203mm, made of stainless steel with center lock system, works perfectly only with Resin pads. It has an Internal Serration type lock ring. It is compatible with the following brake models: BR-M9100*, BR-M9120, BR-M9110-R**, BR-M9000, BR-M9020, BR-M8100, BR-M8120, BR-M8110-R*, BR-M8000, BR-M8020, BR-M7100, BR-M7120, BR-M7110-R*, BR-M7000, BR-M6100, BR-M6120, BR-M6000, BR-MT520, BR-MT420, BR-M820, BR-M640, BR-S7000, BR-S700, BR-R9270**, BR-R9170*, BR-R8170*, BR-R8070*, BR-R7070*, BR-4770*, BR-RS805*, BR-R785*, BR-RS785*, BR-RS505*, BR-RS405*, BR-RX810*, BR-RX400*, BR-CX77**, BR-R517**, BR-R317**, BR-RS305**, BR-U5000**

*   not compatible with 203mm
** only compatible with 160mm