Zack’s had a Ripstik for several years now. It’s one of those funky skateboard-like things with two wheels:
He loves it and zips all over the neighborhood. Well, he finally decided it might be time to get some new wheels for it, because the old ones had basically worn down to a nub. We ordered the wheels, and the difference is pretty staggering:
The one on the right has worn through to whatever weird filler material they stuff inside. With the new wheels, he should be ready for another few years of zipping around.