I had a pair installed on my wife's Specialized Ariel (gal's version of the Crosstrail), and sadly I must report that they are noisy. The front one seems to be fine, but the rear one has a loud clank every time she hits a bump bigger than a garden hose. I picked up the bike four or five inches and let it drop, and can easily reproduce the clank noise. Seem the two rods that run from the axel to the rear of the fender are a little lightweight and allow the fender to slap the tire--or at least have come close. Not sure exactly where the clank noise is coming from, but it may be when it goes back in place after hitting the tire--or after the extent of it travel. One thing for sure, it does not stay in place. Now it leaves it up to me to figure out a way to stop it. I haven't picked up my new Crosstrail yet, but I ordered the fenders, and I suppose they will be the same.