We put a 6 year old and a 10 year old on the Surron Hyper Bee to see how it goes in the 50 cos and 65 class because this one bike can ride in two classes if you switch the wheels from 10/12-inch combo to 12/14 inch combo. Would the hyper Bee be too much bike for a kids int he 50 class or would it be too slow for a kid in the 65 class. We ask our 50 and 65 tester to find out.