Made by JT Sprockets, world leading aftermarket sprocket manufacturer for over 30 years. JT Sprockets offer an unbeatable combination of quality, durability, and price. JT Drive sprockets are exclusively made from the finest Japanese ultra-durable high carbon C49 Steel or SCM415 Chromoly Steel Alloy. Compatible Bikes: Manufacturer Model Year Bultaco 50 Astro SM Bultaco 50 Lobito Derbi 50 Senda R DRD Pro 2006-2013 Derbi 50 Senda R DRD Racing 2006-2013 Derbi 50 Senda R DRD 2002-2005 Derbi 50 Senda SM DRD Pro 2006-2012 Derbi 50 Senda SM DRD Racing 2006-2010 Derbi 50 Senda SM DRD 2002-2005 Gilera 50 RCR 2012-2016
