offset in measured in millimeters.

To figure out what will fit, measure these on your car:



Of course a B310 doesn't have leaf springs, but find the closest point that the tire or wheel would hit.

what is the offset measured in? inches? I have no idea. Is there a way to test to see if it will work without using an actual rim. Perhaps making a cardboard mock wheel? Im just spitballin' here

Correction: Stock offset for B110, B210 and B310 is +30. But Datsun did use +25 for the optional factory alloy wheels, which makes them closer to the outside of the car (more sporty looking).

Less offset is good, you mainly don't won't the tire to rub by using too little offset.

Here's the effect of offset.

0 offset shifts the tire outboard.
+ offset shifts the tire inboard

How little offset a B310 requires I do not know. But the stock wheels have same offset as 1200 wheels. I think the B310 wheelwells are larger than 1200 wheelwells.

in this photo of 0 offset, it shows there is more room on the inside than the outside. It has a 195-width tire, so the rear fenders are flared considerably. With more offset, a 195 would fit inside the stock fenders.

maybe?

As I'm looking at Konig Rewind 15x7's on ebay, I only see offsets of 0,20 and 40. Would 20 be close enough?

13x7, 14x7, 15x7, 16x7, 17x7 even 18x7 fit well. The tire height is far more important -- with larger diameter rims, you'll need lower profile tires.

Use offset +25. Some guys like less offset, but then it will need flares (or stick out of the fenders). Less offset is good for narrower rims, as it will move the rim face outside to the body edge. But with 7" it's going to get there anyways.

The stock B310 tire was 155/80R13 which is 22.8" high. A 195/50R15 will be almost exactly the same height. You can probably go with a bit larger diameter, look at how your tires fill the wheel well now. I wonder is 225/45R15 will fit the back widthwise (it's just a small bit larger diameter than stock)?

You should do a trial-fit before buying wheels and tires for this close a fit. To make sure they fit in the wheelwell and don't interfere at full lock turning.

I've been looking at Konig Rewinds for a while now because they look similar to Mini Lites but are generally cheaper by a few hundred bucks. My problem is that I know nextto nothing about rim sizes and tires, as far as whatr aftermarket items would fit a 210 with little to no midification. I've heard that 15x7's fit well, but i'm not sure what offset is needed, nor do I know what size tires you wrap them in. I'm trying to figure all this out so I can begin to compare prices and get my ducks in a row. Any information would be great! Thanks