Great idea but there are so many variables that contribute to if this will work on your bike it is kinda hit and miss. First of all, they don't hold up in really really cold weather. They break. I had one on a fat bike and I pitched it in the snow. The bike flopped over, and the fender complete shattered. Packed it home and tossed it.
Secondly these things really depend upon your saddle. The rails the width of the rails, the thickness. I typically have to cut a small notch in the fender so it will stay put. Otherwise it can and will just fall off. If you sharpie your cut marks and use zip ties you can get them to stay put. Cu
This device is easy to slip on and off or carry in a jersey pocket if rain is threatening. It is not a full coverage fender but keeps your shorts and jersey from absorbing road spray. It weighs next to nothing, and avoiding a waterlogged chamois is well worth the price.
This seems like such a great idea. Maybe too good to be true.
Well, I purchased the ass saver and gave it a shot. But during my first ride with the ass saver I lost the fender.
I suspect that the fender secures more strongly to certain bikes over others.
I would suggest looking to a slightly more expensive fender which securely attaches to the seat post.
Just to describe the ride I was on. I was on a training ride on a bike path on a fairly windy day. So I suspect my speed and crosswinds were too much for the ass saver.
This product won't keep you 100% dry, as full fenders would, but that's not the purpose of it. It's an ass-saver for a reason. Construction seems sturdy. It doesn't take up much room as it can fold under your seat when not in use.
Unlike some other riders, I love the Ass Saver! It's lightweight, easy to put on, easy to carry. And cheap. It does a decent job of keeping your rear dry, and saves you the hassle of putting on full fenders. Your riding mates might get sprayed if they ride too close, but they'll figure it out.
This thing works great!!! It keeps the spray and mud from your rear tire off of your butt and back. It's super light and is easy to install. I put it on when the streets are wet or I know it's going to rain.