Bought this after I got a pinch flat on my bike, figured since I need to replace the tube I should get an upgraded one. The box is huge so packing this along as a spare doesn't seem like an option. Upon removing this from the box, you'll notice the rubber is very thick and heavier than standard tubes; But with that it was still a breeze to install. I haven't had the issue with the valve stem leaking yet, so hopefully they fixed it. I do notice the weight in the rear but I'm not that concerned with weight, I'd rather not have flats. So far so good, will update after a few trail rides and see how it holds up.