They can be murder on your wheels, especially if you're a big dude. As was mentioned, the ride isn't nearly as smooth/fast, but if you hit a pot hole or something, you can seriously jack up you wheel because there's not as much give. I know it's counterintuitive because the airless tire actually has more overall give, but if you hit a pothole on a normal tire, then the air is just displaced to other parts of the tire, and it's able to absorb the shock better. Just my $0.02. If you're worried at all about your wheels, I'd stay away from airless.