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Old 10-12-2012, 20:34   #1
Tony641
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Anyone here know about tire sizes?

I need to get new (or used) tires for my wife's Charger. The size of the factory tires are 225/60/18 I found some nice used tires but the size is 225/50/18 94t(whatever that is). Will these tires work on the rims and with her car?

Thank you.
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Old 10-12-2012, 20:38   #2
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the 50 is the sidewall height

They'll work, but you'll probably notice it rides a little rougher
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Old 10-12-2012, 20:39   #3
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Yes. Acceleration will be slightly more brisk but the speedometer will overestimate speed by a wee bit. I would do the actual math but I've been drinking.

The first number is how wide the tire is in milimeters. The second number is the length of the sidewall in percentage of the first number. The third number is the size of the rim in inches.
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Old 10-12-2012, 20:40   #4
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The 50 is a lower profile tire than the 60, but they will fit. Will also skew the speedometer slightly,probably not enough to matter.
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Old 10-12-2012, 20:42   #5
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I think the 94t might be the speed rating but not 100% sure.

Last edited by handyman; 10-12-2012 at 21:04..
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Old 10-12-2012, 20:42   #6
JW1178
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They will come out slightly wider but lower profile. Be careful with the newer cars because it will make their stability systems go haywire. Contact your Dodge Dealer or even some online forums and see what they say before doing so.
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Old 10-12-2012, 20:51   #7
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Thanks for the great info guys. DSMonsta, I had to check and see if you were from Wisconsin after the drinking comment. Enjoy the weekend. Thanks again.
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Old 10-12-2012, 20:52   #8
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The first number, 225, is the tire width in mm. The second number, 50 or 60, is the percentage of height to width... So a 225/50 is 50% as tall or 112.5 mm. The third number is the wheel size in in.

You can take manually pencil whip it to determine total height (your width is the same) or you can use an online calculator.


Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
225/60-18 5.3in 14.3in 28.6in 89.9in 704 0.0%
225/50-18 4.4in 13.4in 26.9in 84.4in 751 -6.2%

6.2% difference is noticeable, but certainly it will drive fine. The speedo will be off a few mph.
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Old 10-12-2012, 21:12   #9
RenoF250
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Quote:
Originally Posted by Dan_ntx View Post
The first number, 225, is the tire width in mm. The second number, 50 or 60, is the percentage of height to width... So a 225/50 is 50% as tall or 112.5 mm. The third number is the wheel size in in.

You can take manually pencil whip it to determine total height (your width is the same) or you can use an online calculator.


Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
225/60-18 5.3in 14.3in 28.6in 89.9in 704 0.0%
225/50-18 4.4in 13.4in 26.9in 84.4in 751 -6.2%

6.2% difference is noticeable, but certainly it will drive fine. The speedo will be off a few mph.
The numbers are not actually very exact though and vary by model. It is best to look up the real dimensions on the web the actual difference could be a bit more or less.
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Old 10-12-2012, 21:17   #10
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I like that they mix metric and english units with tire sizes. Then they said, how can we make it even more convoluted? Oh, let's make one size A PERCENTAGE of one of the other sizes!

I think after they made up tire sizes, this person went on to name cartridge sizes. (.357 and .38 special use the same size bullets etc.)
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Old 10-12-2012, 21:18   #11
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I would not recommend going with that tire size. The difference in sidewall height is almost 2 inches and will cause the speedometer to be off by 4mph, and it will look out of place on there.
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Old 10-12-2012, 21:26   #12
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I'm not comfortable buying used tires. They might be takeoffs with nothing wrong or they might have problems.
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Old 10-12-2012, 21:35   #13
Tony641
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Yeah a 2" difference would be a bit much. I'm in Northern WI, If we lose than much height we'll get stuck this winter for sure. Thanks everyone for your input.
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Old 10-12-2012, 21:35   #14
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Quote:
Originally Posted by Tony641 View Post
I need to get new (or used) tires for my wife's Charger. The size of the factory tires are 225/60/18 I found some nice used tires but the size is 225/50/18 94t(whatever that is). Will these tires work on the rims and with her car?

Thank you.
Any street tire will fit any street wheel rim. Now if you mean the WHEELS on her car, that's a different question.
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