The Riva is the perfect rhythm skate wheel for anyone on a tight budget. Sold in packs of four wheels. To order a full set of wheels, be sure to set your quantity to two. 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.