I have a 1966 plymouth satellite springs still in factory location i have 15 x 7 steel rims with a 4.5 back spacing whats the biggest tires i can put on the back & front.!

Is there a question somewhere in there? Its a bit hard to tell.

Yes read what it says i am asking.!

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Is there a question somewhere in there? Its a bit hard to tell.

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It's been a long time, but I had 245-60's all around on mine from memory. Was hard to fit anything really wide out back I seem to think? (a 255 maybe?)

Of course now a days I would go with something modern in 17" or 18"

Honestly a tapr measure and a piece of chalk is your best way to find out..
Keep atleast a 1/2" clearance from the wheel lip and the springs.

15x7 4.5in back space 255/60-15 on back perfectly centered with a little less than an inch clearance on each side.
235/60's on the front. Tires are indy 500's

you can get a 275/60/15 out back and I'd run a 215/75/15 or 225/70/15 up front.

Yes i was able to run the 275/60/15 out back but i needed to trim about 1/2 inch of the Inner wheel lip. Plus i used a 15 x 7 steel rim with a 4.5 inch offset i had to let out the air & work them in but they fit and the back off the tire near the spring has just at a 1 inch spacing & the front of the wheel opening there is just over 1 1/4 inch of space.

The fronts i ran 245/60/15 on steel rims. the car handles way better than it did before.
Thanks for all your replies was helpful.

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you can get a 275/60/15 out back and I'd run a 215/75/15 or 225/70/15 up front.

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