Technical Tire sizes HELP..

I have a 37 Ford Tudor. Had it for many years. I bought wheels and tires for it maybe 20 years ago. The tires are in great shape, but have to be replaced. I cut a loop out of my front coils to lower the front about 2". I have 195 65R 15" front, and 235 70R 15" on the Rear. I would like to raise the front cross member up maybe 1" Would a 215 75R 15" raise it a little?? Also in the rear are the 235's. I was looking for 245 70 R 15, but they are not made in that size anymore. Whold a 255 75 R 15" fit under the rear fender?? Just not sure. Thanks..

 

Some tire websites have tire heights listed along with the metric sizes. I know Coker does. You might browse there and see if it helps.

John

 

Just google one tire size vs the other


it’s gonna raise it 1/2 the theorized height distance

 

Go to tiresize.com and select Tire Size Comparison.
If you go from 195/65 r 15 to 165/80 r15; you gain .4 inches in height of the tire but only raise the car a quarter inch.
BTW, I used to always run 195/65 r 15 on the front of all my hot rods but have now switched to the 165/80 r15 for all but the heaviest hot rods. The 6.5" width looks more hot roddy to me than the 7.7". Just personal preference. You can do the same with the rear tires.
I love the visual comparisons and contrasts.
Good luck,
Al

 

The first number is the width of the tire, in MM. The second number is the aspect ratio, in percent. That's how tall it is vs how wide it is.

If you want a taller tire, the same width, keep the first number the same, and increase the second number. So...go from a 195 65 to a 195 75 on the front. And in back, go from 235/70 to 235/75.

We can't see how close the tires are to rubbing...you can...so think about what a taller tire would do, think about what a wider tire would do, as you're staring at the tire fit in the fenders.

 

Go to a tire shop and get some junk tires to try out, they may be glad to get rid of a few.

 

Sounds like an OT front end, if you know the source of it, maybe track down springs that will give you the height you want back?

 

At first after taking a loop out of the coil springs. It dropped maybe 2". I then put on 2" drop spindles. I couldn't put a pop can from the ground under the front cross member. After I put the stock spindles back on it raised it up so that the pop can just clears the cross member. Now it seems like a nice height, but I wonder about pot holes. We have a ton of them here. I really don't want to add a skid plate to it. My front bumper is about 13" off the ground in the front. I am thinking by raising the front tires just a little it will raise that front cross member just a tad.