Well been staying with the idea of learning to work on my own bike. Yesterday I removed the rear wheel so I can change out the rubber. Short of getting the axel out everything went alright. So I now have a tire to bring in to get mounted and balanced. I took the sprocket off. Underneath is a form fit rubber piece on the wheel. Is this the isolator that I read about, and should I pull it off the wheel before I bring it in to get changed? Thanks
Ozzy