What's size were the tires that came on the '70 240Z from the factory? I think mine may be the OEM size, 175SR 14 Toyo Z (no aspect ratio listed on the side wall). They look skinny. The tires are old but only have a couple hundred miles on them, I have the tire warranty listing the mileage on the car when they were installed.

Who sells custom rims that would fit those tires? The rims have to look like they belong on a 34-year-old Z car. I'm sort of torn because I have Z hubcaps on the car but they are not the correct ones, they have a "Z" in the center, not a "D". I think "D" hub caps would be out of my budget, especially since seeing that set that went for $1,200+ on ebay the other day. Also, the hubcaps I have look kind of drab.

175/80/14 is the sidewall you want.

I think any other Z-car 14" wheel will look good on there and fit the style of the old car. The 6-star 280ZX 14" wheels are my favorite. They are narrow so 195 tires fit well. 195/70-14 would be the correct size if you replace the tires.

The hubcaps with the D center are just the early ones. Early 1970 only I believe. After that the 240Z got the Z in the center. Those are still "correct" Z-car hubcaps; they are just more common than the D center.

The search function is great for this kind of thing:

http://www.classiczcars.com/forums/showthread.php?t=5065&page=1