Hello, I just bought a set of (what I thought was) Mavic Ksyrium SSC SL '06 wheels. When I got home I noticed the front had a yellow background on the "SL" letters on the rim whereas the rear rim did not have the yellow background on the "SL" lettering. I did some online viewing of some pictures and it looks to me the front is an '06 and the rear is an '05. Is this one way to tell the '06 from the '05 model? Can someone confirm this? Thanks.