What does it say on the side of the tyre? That is the best way to find out what you have, should be written plain as day.
Hi Paul can I make a suggestion? It helps if you say Hello in the new members section BEFORE you ask a "how do I fix my bike" question' We get loads of one hit wonders on here who ask for help then vanish never to be seen again and they rarely if ever say "thank you" when advice is offered, makes folks wary of first time visitors, obvious really, it's not that we're unwelcoming it's more a "why bother if they won't even say hello", so if you would be so kind to pop over to the above section you might get more help. Just sayin.