I have been running tubeless on my mountain bike for two years and it has worked great for me. I used the Stan's conversion on my stock redline wheels with no issues. It is tricky to get the bead to seat the first couple times you set them up, but it gets easier once you figure it out. I haven't had a pinch flat since converting to tubeless and I have only had two sidewalls tear, but those were regular tires not intended to but be run tubeless.