Don't run wider than a 25mm tire with them, though. I had the P35 fenders on my 28mm Gatorskins (which run narrow!) and was getting side spray from them.
I moved up to the P45's and I'm digging them much more (and I can run my 35mm studs in the winter.)
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"I feel like my world was classier before I found cyclocross."
- Mandi M.