Hi Guys N Gals! Bumping this thread, newbie needs info on inner tubes please? Been searching for a rear inner tube for the Xt660R, where do you source your 130/80-17 rear inner tubes from, please? Been to a couple of motocross shops they mainly do inch size tube. Would equivalent tube be 4.00/4.5" or 4.5/5.0" or bigger? Or just the best ones /best priced metric tubes to buy, please? Thanks