I have racers on my px10. they brake very well. I have a question, though:

I replaced the wheelset on the bike, which was previously setup as a fixie, with some mavic open 4 cds, and now they squeal like CRAZY. Like, so bad I am embarrassed every time I have to stop. The rims are clean and I have set them to toe-in, and I have brand new Kool Stop pads on them, and still the horrendous sound. They didn't squeak at all on the last pair of wheels I had with the same pads. What's the deal?!

THANKS!