Need 0.004" or 0.10mm clearance.
white shim 3.24, 3.20, 3.20, 3.24 = 3.22mm
red shim 3.36, 3.32, 3.32, 3.32 = 3.33mm
Have 6.55mm shims and measure 0.29mm clearance.
6.55mm + 0.29mm - 0.004 inches = 6.74 mm
With white shim need a 3.52mm or 0.139" shim
With red shim need a 3.41mm or 0.134" shim
http://www.google.co.nz/search?q=6.55mm+%2B+0.29mm+-+0.004inches+-+3.22mm+in+inches
-- TomParker - 06 May 2008