The Rollerblade Microblade Free 4WD  junior adjustable inline skates offer an easy to use extension system (adjustable four full sizes). It works with the push of a button and with markers in the toe area which align the skates to the correct size. The engineered mesh upper improves breathability and provides enhanced comfort for your child. A durable frame design lowers the centre of gravity to improve stability, balance and control. The 72 mm wheels and SG3 bearings are ideal for a kid who wishes to skate freely in full confidence. The frame allows for an upgrade to a 3-wheel 80 mm configuration by simply purchasing larger wheels (sold separately).