Bought the R1. My daughter turned 6 today and was literally buzzing when she opened it as we told her we couldn’t get one. Lasted half an hour before smoking profusely from left wheel. Needless to say 6 year olds day is now ruined. Have been trying to get hold of Rolab all day with no joy. Left completely heartbroken and I can’t even give her an answer. £150 that I will be chasing through PayPal. Terrible company terrible product.