This product is well constructed. However the quick release is not strong enough to hold this in place. If you are getting a rack with pannier supports, then you will have at least a few pounds hanging on this. I have no doubt that it can support the weight without breaking. The problem is that it shifts side to side and rubs the tire, even with very easy riding. I had to put a piece of rubber inside the clamp for extra grip and I have to use channel locks or a vise grip to help clamp it every time. If you are serious about wanting to have a rack you can remove, get a second seat and post. Then you can mount it permanently for the extra rigidity. If you don't need the pannier supports, then there wont be anything to rub the tire and the little bit of side to side movement probably won't be a problem.