The Radar Riva Wheels are a great indoor wheel measuring in at a 96A. These are great for coated surfaces like rink floors or polished concrete. These Wheels are mainly used by recreational artistic skaters, rhythm and dance skaters, or jam skating. Check them out if you are looking for a hard wheel for indoor surfaces. We are currently offering a set of Abec-9 BankRoll bearings for $10 with all Riva wheel purchases!