Hello got a 70 442 time for new skins running 225-70-14 want to get 235-60-14 any down sides to making this change? Does it fill the wheelwell? I measured the 225 70 installed and they are 25 inches to top of tire can someone give me the height of the 235 60 installed thanks

 

I would go with 245-60-14 instead. Had those on my '71 for decades until I switched to 15" wheels, then used 245-60-15s.

Here's an old picture of my car with the 245-60-14s.

 

Use this link to a great tire comparison calculator. This calculator will give you the diameter (height) of any size tire, as well as other specs, and will even allow you to do a visual comparison of 2 different tire sizes side by side.
https://www.tacomaworld.com/tirecalc

 

my .02 ...... 235/60/14 & 245/60/14 are too short for the big wheel wells of a GM '70-'72 a-body - both are shorter than the 442's factory G70-14 (& its 225/70/14 modern equivalent)

 

^^^THIS! The 225/70-14 is 26.4" outside diameter.
The 235/60-14 is nearly 1.5" SMALLER in outside diameter (25.1") and a whole 3/8" wider. They are barely big enough for a Honda.
Even the 245/60-14s are almost an inch smaller in diameter (25.6") and barely 3/4" wider.

 

Back before metric sizes they were G70 14 or H70 14, or even J or K (?). The higher the letter the taller the tire, everything else being the same. I think I had J70 14s on my '71 Cutlass back in the day.

 

Fender filling vs tire height really depends a lot upon the vehicle ride height. If the car is 4WD high, taller tires are needed to fill all that open space. With a lower ride height, a shorter tire will fill the gap adequately. Choose the tires accordingly.

 

The problem is that when a car is lowered too much, the arc of the wheel opening doesn't match the arc of the tire, which looks goofy to me, anyway.

 

Well, from what I see, the OP hasn't weighed in on any of this professional wisdom yet. Maybe it's just the way I read his post, but I kind of got the impression from the get-go that he wanted to stick with his original 14" wheels because he never mentioned potentially going to a larger size???

 

I agree totally and that is why is really don't like the trend of putting gigantic wheels with rubber band tires on a lowered car and it doesn't fit the wheel opening. Of course that applies to taller tires in general as well regardless of the ratio width/height too. People seem to like that look today.