Quick and easy to attach and take off. It could pose a problem if you have your seat slammed, but then you probably have other problems, if that's the case. Takes care of the back spray, but won't protect you from rear spray around your cranks, find a clip on fender that can do that and color me impressed.
I bought this fender to bring along on a week long tour. It easily snaps apart and back together. So, it's easy to pack in a bag. I used it a couple of times during the tour. It performed well, keeping my backside free from road spray.
I have two of these, one lives on a bike overseas. I bought a second one, and it is even better, they changed the material on the strap that cinches the fender to the seat post, and it holds better than the original, and the company then replaced the strap for my old one. Excellent.
I could go on and on describing how happy I am with this but, suffice it to say that in the long list of stuff I've bought for my bicycles, this things ranks right up there amongst the best money I've ever spent. It's light, folds flat so it can be packed away, and installs literally in seconds. I like it so much that I'm going to get a second one for my mountain bike.
This rear fender is very easy to set up and adjust, and offers excellent protection against rear wheel spray. The seatpost grippper stays firmly in place, so you don't have to deal with it sliding mid-ride and exposing you back end to water. The fender itself also detachesre-attaches to the mounting bracket, which makes the fender versatile for changing conditions like a wet ride to work and a dry ride home.
I appreciate the ability to remove and store the flat, foldable portion of this fender in a back pocket (or anywhere else) without removing the clamping mechanism. It's a feature I wouldn't have thought I wanted but I've ended up putting it to use a lot. Smart stuff, PDW, as usual. I'm not sure about durability but if I haven't updated my review, it means there were no issues.
Took a little bit of adjustment to get it properly snug so it didn't drift, but once adjusted correctly it barely moves. Does a good job keeping the mud off me. I'd buy it again.
I bought this for a rain road bike with wider tires (28 mm). It works fairly well to keep your shorts and jacket from getting wet and the streak. Easy to mount but the the flip down lock can be iffy. It fell off once. I put an elastic band across the indentations so that it cannot slip off. I understand that new Ass Saver design is to have the locking tab flip up. The new design might work better.
Apparently the description failed to mention this is only for MTB and ATB wheels... it's not long enough for 700c or 29 wheels because it will still allow a rooster tail to hit the back of your helmet or a backpack which I use while commuting.
It would have been perfect for a regular MTB, clamping mechanism is secure and the allen bolt allows you to tighten the fender tightly.
Depending on bike geometry and other factors, this rear fender can be used on a 700C (ISO 622) wheel. I've used it successfully and have seen it on other bikes around town here in Portland, OR. It might take some adjusting to catch all the the spray which might otherwise reach you, but it can usually be done.
A full coverage fender will always provide better protection and help to keep you dry and comfortable in bad weather. Planet Bike's Cascadia Fenders are a great choice.