Question: what size bike can i ride at 18?
Answer: AM licence (allowing you to ride a 50cc bike) if you are 16 or over. A1 licence (allowing you to ride a 125cc bike) if you are 17 or over. A2 licence (limiting you to a bike up to 35kw) if you are 19 and over. A licence (allowing you to ride any bike of any sized engine) if you are 24 or over.