The SFR Light Up Wheels are perfect for use at home or in the roller disco. The wheels are fitted with a built in generator magnet which makes the wheel light up when rolled. Clear PU with a Pink or a Silver core, for the perfect disco experience! Also suitable for outdoor use. Sold in a set of 4 for one skate, you need 8 wheels for both skates or '2 packs'. You will also need 16 bearings sold separately.