I have had these wheels for over a year skating on concrete floors and rink floors and I wear them on a pair of R3's. I have the pink pair and they were great!! I am a bigger girl at 5'11, 200 pounds. Had no problem with them breaking or pieces coming off. I have a teammate whose husband even regrooves our wheels. He has regrooved mine twice in the last year for me and they still rock!! Highly recommend if your a bigger girl, I know some of the smaller girls that have tried them said they didn't work to well for them.

i have had every color of these wheels and every one of them broke very quick. the wheels run out of grip very quick to. the grip sucks. they are very heavy. i just dont like these wheels. AT ALL!

THESE WHEELS ARE IT!!! I have been SK8'n for over 43-yrs., now, and I JAM, as well as SK8 standard-style. You MUST CHOOSE the pink "Hardness", as these are the ABSOLUTE BEST for the ROLL since they don't "lose their ridges" like SO MANY OTHER WHEELS, okay? Now, when I say "JAM"--this means that much of my "footwork" is performed on the "edges", or "angles" of the wheels. This wheel works great for JAMSK8 AND leg-work SK8'n! --You will also be "the envy" of E-ONE on the floor, as this wheel is one of THE FINEST wheels made! Check-it-out. Bootsy

ok, these wheels r fast but i got them christmas and they r already getting peices chipped off, not recommended for jamsk8ing. just use them for speed

Works great for people over 190 lbs and on metal plates. Does NOT work on plastic/nylon plates like sunlites or R3