Spare tire size??
September 2nd, 2018, 12:01 PM
#1
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Thread Starter
Join Date: Jul 2018
Location: Chesapeake, VA
Posts: 3,221
Spare tire size??
So after my episode with the blowout in my trunk yesterday, obviously I still need a spare. Question is, what size? I have 225/70/15 up front and 275/60/15 out back. I'm thinking a good "meet in the middle"size would be 245/60/15.
What do y'all think?
Dave
What do y'all think?
Dave
September 2nd, 2018, 12:23 PM
#2
Administrator
Join Date: Oct 2009
Location: Poteau, Ok
Posts: 40,553
225/70-15 and 275/60-15 are almost the same size, 27.4 and 28 basically a radius difference of .3. Go with a spare as close to 28" as you can get. Below is a tire calculator that can help you out.
https://www.discounttire.com/learn/tire-size-calculator
https://www.discounttire.com/learn/tire-size-calculator
September 2nd, 2018, 02:12 PM
#3
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,301
The spare is only for temporary use. The diameter is what matters - width is irrelevant. Your 245/60-15 is smaller in diameter than either of your current tires, which makes no sense as a spare. Since you're close on the front and back diameters, get a 225/70-15 spare. This would be fine for temporary use on the back and could be rotated onto the front to equalize wear if you wanted to.
FYI, 235/7015 and 275/60-15 are almost exactly the same diameter. That's the combo I have on my 67 Delta, with a 235/70 spare.
FYI, 235/7015 and 275/60-15 are almost exactly the same diameter. That's the combo I have on my 67 Delta, with a 235/70 spare.
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