looking for tire height for 75 vette with mags

[cmorebuttz1]

Hi All.
I hope there are a few tire guys out there. I have a 15 x 10 wide rim that i want to put a juicy tire on, but want to keep stock height for speedo calibration. Anyone know the size im looking for to keep the height the same? I believe the stock tires were GR70-15
Thanks
Andy

 

[glen242]

27.4" I believe. Anything between 27" and 27 1/2" should be ok.

 

[MoeJr]

255/60R15 is 27.05. Should be close as you get. Rather be a touch shorter than taller.