I knew the new fenders I put on the fixie would bite me in the ass. Pre-fenders, I had no toe overlap. Post-fenders, there's toe overlap which caused me to stop in my tracks w/ the rear wheel coming up a bit as I tried to take off from a standstill. No fall, but it did annoy me a bit. I'll keep the fenders on a little longer and try to get used to it, but they're probably coming off after spring.