All my tires are 205 60r15's, but one of them is bad so Im taking a tire off of my 86 with measures of 205 50r15. Would this make the car drive noticably different?
Thanks

 

It would probaly cause problems if you do it at all I would put it on the front as it may screw up your diff my best suggestion would be to put 2 good 205 60r15s on the back and put two 50 15s on the front.

 

the 205/50 would have a little shorter sidewall than the 205/60 i wouldnt mix them just go buy a tire that is the right size

 

It can work for a little bit, but might cause wear problems on the tires. I agree with SOIA about the differential thing, keep the rears the same and put the odd ball tire on the front until you can get a new tire.