Shimano 105/SLX/Deore/Metrea rear derailleur replacement guide and tension pulley set. Suitable for a range of rear derailleurs 105 RD-R7000, RD5800-GS, SLX M7000-11, Deore M6000-GS and Metrea U5000. It's recommended that you replace your derailleur pulley wheels periodically for the best shifting performance. Set comprises of two pulley wheels. This is a derailleur wheel for the Shimano Deore Trekking RD-5800 10-speed rear derailleur. A set consisting of an idler pulley and a derailleur pulley. 11 teeth each. Scope of delivery: 1 pair of derailleur wheels.