Have 2010 XT Wheelset with the 15mm front(xc). Am trying to mount a standard Minion up front and a UST Highroller in the rear. Using compressed air, soapy water and Cafe sealant. Nothing to it, except the block style Cafe valves leak. An experienced friend trimmed the Stan's valves, and they leaked. I realize the Shimano valves are not removable. Can I get a non-UST tired beaded without compressed air? Does Stan's offer a vavle for UST XT/XTR wheels? These wheels are quite popular, and have been solid. Surely I am missing something. Much thanks.