I bought these wheels as an alternate for my stickier indoor wheels. Got the 103A version, the hardest ones. WOW. These wheels are fast and durable for sure, but may be a bit much for rink skating. I find myself "drifting" a lot around corners when I build up speed, but the ability for movement on these babies is incredible. Definitely NOT built for constant speed, as they slide out a lot on rink surfaces, but they sure do roll. If you can get used to the drift factor, you will definitely dig them.