Heartless Derby Wheels Breaker/Tangerine - 62mm/94a (4 pack)Heartless Wheels are the only wheel brand that is 100% designed, focused and dedicated to the Roller Derby skaters who are looking for the most agility and the most manoeuvrability possible from a wheel. With four different hardnesses available, two width options and a true hollow core hub, these wheels allow a skater to turn, carve, jump and cut like butter. Hardness Good For Skating Stalker 88a Black Concrete, dusty wood, old sports tile Creeper 90a