Both of my rear tires are wearing out and I'm planing on replace it. Mines is an 01 and it has 225/50/16 tires in the rear. My question is, "will 245/50/16 tires fit on my 01 OEM wheels (rear) ????

Thank You.

 

Each size varies from manufacturer and model of tire. The recommended replacement non OEM rear tire is 245-45-16.

 

I see that it is recommended to replace non OEM tire with rear 245/45/16 and front either 205/55/16 or 225/50/16. Question is: Won't the height from the wheel to the top of the tire be taller in the front with either ...55..or...50, since rear is ...45...??? Will rear tire look smaller from the side view?

 

FYI, according to specs the OEM tires are .2" shorter in the rear in the first place. The 55, 50, or 45 your asking about is the aspect ratio. When the tire width goes up say 225-->245 the sidewall would get taller unless you go to the next lower aspect ratio. Like RACER said the actual specs vary depending on manufacturer or even style so it's best to look at the tires actual specs versus "sizes".

 

Thanks. I understand what you are saying. The 245/50/16 "pinch" up taller because the width is wider on the same wheel. Hence, I would go to 245/45/16. And, I did not know the back were a smidge shorter.... Information is good. Thanks.

 

OEM Specs On The S-02 Tires

This link shows the specs on the OEM tires . Look at the Porsche N3 tires, Porsche has their own rating btw. The same size tires as the MY00-03 S2K have different measurements.

A tire with an aspect ratio of say, 50, would mean that the height, or profile of a tire would be 50% of the tires width. An aspect ratio of 45, woud be 45% of the tires width and so on.

 

Okay. My previous tires were the S02s. 225/50/16... tires now are 245/45/16. Because the second tire is wider, the aspect ratio is a lower percentage but about the same height from wheel to top of tire. Right?
225/50/16 aspect ratio = 112.50, 245/45/16 aspect ratio = 110.25 and 245/50/16 aspect ratio = 122.50, So..... the 245/45/16 rear has the closest aspect ratio to the front at 225/50/16...Am I correct in my reasoning? (Why I want to know this, is beyond me. I am far too detail oriented.. don't ya think!)

 

Correct. As you calculate, the tire height with the 225/50/16s is 112.5mm, with the 245/45/16s 110.25mm, and with the 245/50/16s would be 122.5mm. The two millimeter difference is less than the amount of change over the life of the tire due to tread depth, while the 10mm difference with the 245/50s would be noticeable.

 

Hey, thanks for the response guys.
I probably go for 245-45-16 in the rear and 225-50-16 in the front.

 

If you wanted to convert mm to inches, divide the mm's by 25.4

225 divided by 25.4 = 8.858 inches. Times that by .50 (aspect ratio) and you come up with 4.429 inches. (profile)

245 divided by 25.4 = 9.645 inches. Times that by .45 (aspect ratio) and you come up with 4.340 inches. (profile)

This is just a base line. Due to the fact that all tires are constructed differently, a given size will vary in measurement from manufacturer to manufacturer and even model to model from a given manufacturer


http://www.tirerack.com/tires/tiretech/general/size.jsp