Apico steel rear sprockets are manufactured using an aerospace grade light weight C45 Medium Carbon Steel. Cad Designed for enhanced tolerances and CNC machined laser cut profile for improved weight reduction and strength throughout. A standard feature with all Apico rear sprockets are the clearing grooves around the outer edges of the sprockets. Theses help to remove any build-up of mud and reduce ware and additional stress to the sprocket. Finished with a Cataphoresis Electro Coating giving them a unique look and unrivalled anti-corrosive properties. GAS GAS MC/MC-F125-450 21-25 EC/EC-F250-500 21-25 EX/EX-F250-450 21-25 KTM SX/SX-F 125-525 90-25 EXC/EXC-F 125-620 90-25 HUSABERG TE 125-300 10-14 FE 250-570 00-14 HUSQVARNA MX TC 125-250 14-25 FC 250-450 14-25 HUSQVARNA ENDURO TE 125-300 14-25 FE 250-501 14-25 HUSQVARNA XC TX 125-300 17-25 FX 350-450 17-25 TRIUMPH TF250X 24-25 STARK VARG 23-24