Inline Speed Skates by Trurev. 3 or 4 wheel skate frame,ceramic bearings | eBay
Amazon.com: NC Inline Skates Carbon Fiber Professional 4 * 90-110MM Competition 4 Wheels Racing Skating for Adult Single Row Roller Blades Beginner Sports Outdoors Fitness for Men and Women Roller Skates GYR :
Premium Female / Male Speed Shoes with 90mm 100mm 110mm 4 Wheels Inline Skates Patines EUR 30 to 45 Crabon Fibre Boot Race 1pair _ - AliExpress Mobile
3 Wheel Inline Skates: 3 Versus 4 Wheels – Which Should I Buy?