[RodFather]

I have a '40 chevy, and the rear fenders are 2" wider than stock. I am looking to match up tires for the car, and I never have luck at picking the right size.

On my '39 I have 215/70 r16 on the rear and the front I have 205/60 r16. I know the front's are wider.

I am looking to go with a 16" in the front and a 17" in the rear of the '40. I like a lot of rubber to fill up the wheel wells. Any suggestions on tire size? On the '39 The sidewall is perfect but the backs are thinner than the front.

[home brew]

Here is link that will give you some info on how tires are sized. It will explain how to get your rear tires the right sidewall height for what you want and how to have them wider than your front tires:

http://www.tirerack.com/tires/tirete....jsp?techid=46

As well most tire companies will have some type of calculator or info on their web sites.

[el pollo]

Tire sizing is pretty easy once you get the hang of it.

In your tires' case, the rears are wider. Here's how it goes. On a P215/70R16, the "P" stands for Passenger, or P-Metric. The 215 is the tire width from the widest point of the tire (inflated on a wheel with no load) to the widest on the opposite side. It has nothing to do with tread width, as some tires will have narrower or wider tread widths within each respective size. The 70 is the aspect ratio, or percentage of the total width for the sidewall height. So the sidewall height is 70% of the width of the tire. "R" is radial construction ("B" for belted bias, and "D" for diagonal bias). and the 16 is the wheel diameter.