The search for an adequate MTB rear fender continues. Do not waste your time with this one. It came out of the box crooked. I can sort of live with that but I don't love it. I suppose you could heat it up and try to reset it to straight but doesn't seem like you should have to. I could also return it but it's a hassle and I don't really want to have to try that hard for a $20 fender. Any clip on fender that requires reading the instructions to mount properly should be a miss also.
I got it installed on my 29 hard tail and proceeded to try to ride with it today. It lasted 15 minutes before I took it off and and stashed it in the woods and came back later to get it with the car. During the 15 minutes it repeatedly rubbed the rear tire, bounced around and made a terrific racket. It shouldn't have to be this hard.
I suppose if you rode only on bike paths or very smooth gravel roads then perhaps this thing would work, but as a trail fender it is absolutely god awful.