New Continental E-Last alternator belt. Fits all R1200RT models as well as all R1200GS ADV bikes. Fits all R NineT and R1200R bikes built from 9/2010. Also fits all R1200GS bikes from 2007 with 55 or 60 amp alternators. If your stock BMW belt is 4PK582 then this is the belt you need. Please check your application to be sure you order the correct belt.