The LED lights function simply by using the included 8mm floating bearing spacers that sit in the center of each wheel. The spacers and wheels install just like regular ones, making installation easy! The 85A hardness is meant to be durable and hold up to outdoor recreational and urban skating, so if used indoors on the rink they may be too hard and slide depending on the surface and skater weight. Choose to skate Luminous in all wheel positions or mix in with your regular wheels to living things up! Experience varies, but LED lights have 100+ hours of light time, so the fun fasts a long time!

Product Note:
Luminous magnetic spacers are designed for use with 8mm axles. If you're using 6mm axles, you'll need a 6mm to 8mm Adapter Sleeve (one per wheel).

Not sure what size axles you have (8mm or 6mm)?
Slide one of your axles into the center hole of a bearing. If it takes up the entire space it is an 8mm axle and no adapter is needed. If not, you have 6mm axles. If using with regular long-sleeve 6mm spacers the wheels will not light up. LED spacers are also sold on their own.