Hey guys, I've got a question, do they make an adapter for the speedometer when the tire size is changed? I've got a 74 Super and wanted to go with bigger tires, not sure what size yet, but a friend of mine has a sand rail based on a late 60s early 70s standard bug chassis. He has 235/75 tires on the front which leads to the purpose of this question. Is there and adapter that can be purchased so he can use the stock speedo cable? Or do we have to figure out something different? Thanks in advance for any help.