This is a different tire thread.
One that has to do with same size height but different size rims.

https://tiresize.com/comparison/

Using this web site you have darn near every single size you can think of to compare to what might be your OEM size.

Now, my main question:
What are the pros/cons of a taller or shorter sidewall? Some I already know, such as for use on the racetrack but for everyday use and off road it has me puzzled.
i.e. Jeep started out with 15" rims - then 16", 17" & 18"... all from the factory.

For instance, my chart here. Where the rims are 15 vs 16 and the tires are almost identical, overall height, the sidewall is shorter on the 16".

This is where I get lost.
Shorter sidewall, good or bad?

Short sidewall on a real truck is a bad idea....

Depending on how short you go. And what youre using it for.....the Mall 4 wheeling youll probably be OK with a 20" rim.

Buttttttttttt.....With a real short sidewall a small pothole in the pavement will pop the sidewall and ruin the rim.



15" tires are now more expensive than the 16"....1" sidewall difference wouldn't make much difference in handling ...you'd never know.

OK, that was a bit on the extreme side.

Are 16, 17's cheaper now than the 15's?

Jim always delivers. But he's also the kind of guy that puts mud tires on DUBs.

Yes ...the 15" wheel is phased out so more money and less options.

Its all about what the general public thinks is cool....15" truck wheel of the 70's and 80's ...not cool.

HELLS YEAH!

'Cuz i'm a Non-conformist.

People like the looks of bigger wheels and newer vehicles are bigger and heavier so the brakes needed to stop it in a reasonable distance won't fit in a 15" wheel.

You really wouldn't notice the difference in a 35" tire and a 15"-17" wheel, bump up to a 20" and you would. Airing them down yeah. I wouldn't air down a 20".

Kind of depends on the tire diameter. Would I air down a 31"-32" tire on a 20" wheel? Hell no. Airing down a 35"-37" tire on a 20" wheel is fine to a point.

Sidewall: Short sidewall means less flex in the sidewall when cornering. For a truck it's more of a vanity thing. For a car it means better handling in turns. Sidewall is a good thing for trucks that will see some trail use and cars that you want to ride comfy. Taller sidewall absorbs more bumps on the road. Tall sidewall tires on a truck can be aired down to lower PSI off road to conform better to obstacles and provide better grip by wrapping around rocks and other uneven surfaces. I used to air down the 31's on my Ranger to about 12 PSI when we went serious wheeling.

Wheel size and tire price: Jim nailed it. Common wheel sizes make for more competition in the market and lower tire prices. Ie. my Titan came with 22" wheels (uncommon) and a set of 35" Toyo AT tires was going to run me $2500. For 20" wheels the same tires were $1400. Yup, $1100 less for the same overall tire size (35x12.5") just made to fit a 20" wheel instead of a 22". I bought the same aftermarket wheels in 20" and the 35"x12.5"r20 tires for $3k for the package and sold the old wheels/tires for $1k. So I ended up saving $500 over getting just tires for the 22's by going down to a 20" wheel and tire package.

Stay with common sizes (17", 18", 20") and remember that changing the overall diameter of the tire will have serious effects on other parts of functionality. (Acceleration, braking, turning radius, rubbing inside fenders, speedometer miscalibration, accelerated wear on suspension and steering components, etc.

When i owned a truck with 20's i went out and got a set of michellin ltx at2 yes a little thinner side wall but went with E rated and never had a issue but i would pass on straight steet tires on 20 inch rims on a truck but thats just me. I had mine aired up to 42