Shifty is a small but extemely effective little device for your SRAM 1x11 or 1x12 rear derailleur. Particularly when riding in wet and muddy conditions, we found out, that SRAM rear deraillieurs lack shifting accuracy, due to the fact that the original pulley rotates with its plastic body on a steel axle. The pulley experiences extensive friction, when dirt, water or mud come into play and causes lack of precision or even "ghost-shifting", because the rear derailleur is not able to react smoothly to the trigger´s action, since the shifting cable can not move freely. BikeYoke Shifty features an anodized 6061-T6 aluminum body, which encloses a stainless steel bearing for ultra low friction, even when playing in the dirt. Weight of Shifty pulley: 6.3g Every Shifty now comes with a bolt and axle kit, which allows installation of our Shifty on the popular GX Eagle and NX Eagle rear derailleurs, which normally use a riveted connection, instead of the bolt-on solution of the higher spec derailleurs. You just need to remove the original rivet and replce them with our bolt and axle. https://youtu.be/8hAv5uFFhmA Shifty fits following rear derailleurs: XX1 XX1 Eagle X01 X01 Eagle X01 DH X1 GX1 GX Eagle* EX1 NX* NX Eagle* For rear derailleurs marked with *, you will need to remove the original rivet and replace it with the bolt and axle from the BikeYoke Shifty kit. 1 Set Shifty includes: 1x Shifty pulley - 6061-T6 aluminium, anodized 1x axle 1x bolt Please visit our website at http://www.ecomtb.com.my OR https://shopee.com.my/eco_mtb ** There is 1-3cm errors due to manual measurement. Please kindly understand. ** Actual product colour may slightly vary due to photographic lighting sources or your monitor settings. ** WE DO NOT DO COD ** ONLINE ONLY ** We support original products only. ** PRICE INDICATED IS ALREADY BEST PRICE, EXCLUDE COURIER