Tire size conversion chart- Vintage to modern sizes Sept 16, 2015 10:06:25 GMT -8 Teachndad and oldtrailer like this Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by nccamper on Sept 16, 2015 10:06:25 GMT -8 If you have a Shasta, this link will tell you what tires were originally on your camper.oldtrailer.com/vintage-shasta-airflyte-trailer-specs.htmlScroll to the bottom for other models.