Ok heres the deal I bought a 21 trek rail 9.8 xt and tore it apart in my kitchen and rebuilt it with all XTR 10-51t cassette XTR derailleur shifter and 4 piston XTR brakes. I also pulled the Bontrager pro 30 ally rims with the
Bontrager alloy, sealed bearing, alloy, 6-bolt, Rapid Drive 108...