Being a relatively new mountain biker, I just wanted to see how my older HardRock would look with a fender on. Being only seven dollars, the Topeak Defender seemed like a good choice. I was happy to see that this fender did not reach out annoyingly far because I ride on 26" wheels. The clamping mechanism has not yet failed and I've had it on for about two months, and my seat post is quite a bit skinnier than what I've seen fenders being applied to. It has extensions that I decided to put on both ends of the fender; they are very easy to put on and take off. Overall, it looks awesome, very inexpensive, and keeps water and dirt off of my clothes. Very nice product, well designed.