Apologies ahead of time as I'm sure this has been asked quite a bit. Just had a little racing episode and my 9 speed DA STI's are trashed. I really don't want to spend that kind of money to upgrade the 9 speed, can I just go with 10 speed STI's and leave everything else the same? If that is doable, would my Mavic Ksyrium wheels (SSC originals) take a 10 speed cassette? Did a search and feel I can do this, want to check with those of you in the know. Thanks.