def wheel_size(self, size):
if isinstance(size, Unit):
size = size.convert_to(inch)
self._front_wheel = wheel(int(size))
self._rear_wheel = wheel(int(size))
self.gearing.wheel = self._rear_wheel
def __init__(self):
self._front_wheel = wheel(27)
self._rear_wheel = wheel(27)
self.gearing = gear_assembly()
self.gearing.wheel = self._rear_wheel
self.make = ""
self.model = ""
self.frame_num = ""
self.year = ""
