Backspin Groove Roller Skate Wheels The new Groove 'n Glide wheel from Backspin is here! Size: 62mm X 30mm Color: Available in black, blue, tiffany, purple, red, grey, and white. Hardness: Available in 85A, 88A, 91A, 93A, 95A, 97A, 99A All Backspin wheels have a lifetime warranty.