Hey, so I'll admit I'm a complete noob when it comes to bikes. I'm trying to get this old Raleigh back on the road but need some help with what tyre size I would need. The frame size is 19". I would look on the wall of the tyre to figure it out but they are completely wrecked, all I remember is that they were Alesa. My brother tells me he tried some 26's but they didn't fit. Can anybody help? Thank you.