TGM stands behind their products. One of the red translucent wheels came to me wobbly with a bump in it. The bearing cup (or whatever you call it) was probably off center in manufacturing. I alerted TGM right away and they replaced the set (thanks for doing that TGM). I ride downhill mostly, mellow. The wheels rollover most all debris in the road. I live in Colorado so lots of gravel on the road. Twigs don't bother me and it's kind of fun to crush them anyway. I put some Andale Buttas in them, and they roll for a good distance. I like them and how they perform.