Our 8 ½ boy is in need of a new bicycle but we are having trouble finding one which fits him. Height-wise, he sizes to a 24” frame (with some room for growth). However, he needs a bike that has a coaster (pedal) brake or both a hand brake and coaster brake. On most 24” frames, the hand brakes are constructed such that his hand cannot fully grasp and engage the hand brake. Any suggested brands/models/stores would be appreciated. Thanks!