Organic cycle disc brake pads. Clarks organic cycle disc brake pads are specifically designed to give the best performance under normal conditions. The organic compound gives improved noise reduction as well as increased ‘bite’. Recommended for use with Mechanical Systems. Model Compatibility: VX862/VRX862 SHIMANO Dura Ace BR-R9170, Ultegra BR-R8070, 105 BR-R7070, BR-RS505, Tiagra BR-4770, XTR BR-M9100, BR-M9110, XT BR-M8110, SLX BR-M7110, GRX BR-RX810, BR-RX400, Metrea BR-U5000, BR-RS805, BR-RS505, BR-RS405, BR-RS305, TRP / TEKTROTRP HD-T910, Tektro HD-R310 Supplied with spring clips where applicable