Through the reading on here I think I have my answers but let's confirm! I purchase some 15x7 rally rims from a member here and will be putting them on my 67 Skylark. I was running the 14's with 225 70 14 on the back and 215's on the front. They were a bit skinny for my taste so I sold them. My question is can I run 255-60-15's on the front (all the way around) or should I bring them down to 235's or 245's. I will be running 255's on the back for sure. I'd like to keep them all the same size so I can rotate as necessary.
https://tiresize.com/comparison Use this. I had similar questions for my 64 Skylark. Had 14x7 225 70 14 rally wheels and wanted 15x8 rally wheels with 4.5 offset and 245 60 15. The calculator showed them about 1/2 wider inside and outside (overall 1 inch) and pretty much the same in height. Since I had 2" drop front spindles and all tube suspension, I wanted a good answer before buying and mounting tires. The calculator was spot on, and I have no issues with clearance. Hope that helps.
