SRAM X.4 Rear Derailleur (Black, Long Cage)

Sram Schaltwerk ESP X4 (8/9-Gang | Langer Käfig | 1:1)

SRAM X4 8-Speed Trigger Shifter Rear Only

KMC X8 8-Speed Nickel Plate edition X-Series Bicycle Chain Compatible with Shimano, SRAM, Campagnolo and All Major Systems