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Old 05-02-2018, 03:29 PM   #1
ral2531
 
Drives: 2012 Camaro 2LT
Join Date: May 2018
Location: Southern California
Posts: 2
Full size spare tire for 2012 2LT

Hi folks. I've just purchased a 2012 2LT with the RS/45th package and the 20" wheels. This is mainly for my daughter to drive, so I'd like to prepare a full-size spare tire to keep in the trunk (I realize it won't fit in the spare tire slot). I've read past threads stating that a front wheel/tire (20x8, 35mm offset, 245/45/R20) would work as a temporary replacement for the rear position (20x9, 40mm offset, 275/40/R20). I just wanted to confirm that this is possible, since I'm a little worried about the different offset values. Thanks for any comments or suggestions.

It's great to be back in a Camaro forum. Ages ago I owned a '67 RS featuring a 327 engine and the covered headlights. Ironically, now I have another RS to give to the next generation.
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Old 05-02-2018, 05:41 PM   #2
KillboyPowerhead
 
Drives: 2014 1LT RS
Join Date: Aug 2015
Location: Ontario, Canada
Posts: 540
A 275/40/20 +40 offset tire/wheel assembly fits "around" a 245/45/20 +35 tire/wheel assembly - in other words, it sticks out farther on the outside and the inside - so yes, a factory front wheel/tire will fit in the rear. If you want to confirm for yourself you can simply jack up the car and swap wheels
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Old 05-02-2018, 05:54 PM   #3
ral2531
 
Drives: 2012 Camaro 2LT
Join Date: May 2018
Location: Southern California
Posts: 2
OK thanks KBPH. I'd thought about a trial swap, but was worried I might damage something just trying it, even at home. Also I'm concerned about driving with a front-onto-back spare for even short distances -- any harm that might cause?
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Old 05-02-2018, 09:10 PM   #4
KillboyPowerhead
 
Drives: 2014 1LT RS
Join Date: Aug 2015
Location: Ontario, Canada
Posts: 540
Apart from looking weird, as long as you're not pushing the car hard (I'd basically treat the 245/45 in the rear as a donut like you otherwise would, except you don't have to worry about the ~50 mph speed limit) there's nothing to worry about. The factory tires/wheels are rated for well over the weight of the car so no worries there. Fitment up front is no problem either (for testing the fit if you so choose to) - many people run with factory rear wheels up front for a square 275/40 all around.
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Old 05-03-2018, 06:42 AM   #5
djm96z28

 
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Drives: 2012 Camaro 1SS LS3
Join Date: Jul 2008
Location: Jacksonville FL
Posts: 1,090
Since I bought my 2012 SS new, I've kept a factory front rim and tire in my trunk at all times. The staggered sizes have the same diameter, so the front rim/tire can easily be used on the rear with no problems.
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