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Different sized front and rear tires #453122
May 06, 2017 01:14 am UTC
May 06, 2017 01:14 am UTC
Joined: Aug 2007
Posts: 4,796
Oshawa, Ontario, Canada
Brandon Clement Offline OP
Senior Member, with Far TOO Much Time on Their Hands
Brandon Clement  Offline OP
Senior Member, with Far TOO Much Time on Their Hands
**
Joined: Aug 2007
Posts: 4,796
Oshawa, Ontario, Canada
Hey all, so obviously this is not for an AWD DSM, but for a RWD Cadillac. It needs rear tires but I don't plan on using these wheels for longer than just this summer, I've got winters on spare rims, so I'm looking for the cheapest fix for now.

The stock tire size for this CTS is 225/55R16. Now, I have 2 spare tires, 225/60R16. Is there anything wrong with running those in the rear? Will the car sit funny? I believe the suspension is auto leveling, but I don't want it to look like a damn rat rod or some sh!t haha.

Thanks for any info! Or if anyone in the Oshawa area has some 225/55R16s (just 2) for sale for a good price, I could grab them asap.


No more Jetta!
Tattoo Artist at Lost Anchor
Re: Different sized front and rear tires [Re: Brandon Clement] #453128
May 06, 2017 10:59 am UTC
May 06, 2017 10:59 am UTC
Joined: May 2015
Posts: 126
PEI, Canada
Ben Stretch Offline
Regular Member
Ben Stretch  Offline
Regular Member
Joined: May 2015
Posts: 126
PEI, Canada
Disclaimer- I'm no expert

Most places recommend staying within 3% of the original size. Going to a 225/60/16 would be just over that at 3.44% or 22.5 mm taller tire. The "55" is sidewall height as a percentage of the width (55/100 x 225 = 123.75mm) The 60 measures up at 135mm.

Most online tire sites have a tech section with calculators to show all the differences between sizes. You might want to check one out.





1996 "Canary" Talon...give it any gas and it's dead
Re: Different sized front and rear tires [Re: Brandon Clement] #453132
May 06, 2017 06:53 pm UTC
May 06, 2017 06:53 pm UTC
Joined: Feb 2008
Posts: 3,438
Kitchener Ontario
Stephen Richardson Offline
Insane Member
Stephen Richardson  Offline
Insane Member
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Joined: Feb 2008
Posts: 3,438
Kitchener Ontario
You could have ABS or VSA issues. I am not familiar with Caddy and honestly I never plan to be. 1/2" might be enough difference from front to rear to set off the abs sensors, then again you might fine.

Re: Different sized front and rear tires [Re: Brandon Clement] #453142
May 07, 2017 04:45 am UTC
May 07, 2017 04:45 am UTC
Joined: Aug 2007
Posts: 4,796
Oshawa, Ontario, Canada
Brandon Clement Offline OP
Senior Member, with Far TOO Much Time on Their Hands
Brandon Clement  Offline OP
Senior Member, with Far TOO Much Time on Their Hands
**
Joined: Aug 2007
Posts: 4,796
Oshawa, Ontario, Canada
That's the only thing I was worried about, don't want to set off any sensors and also don't want it to look funny. Figured I'd ask in case anyone else has come across it.


No more Jetta!
Tattoo Artist at Lost Anchor

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