[HarryD]

Originally Posted by feds

While searching to see what tires would be best, the tire rack says that the original tire size for a '85 911 is 195/65-15 and 215/60-15. My tires are 205/55-16 and 225/50-16 mounted on what appear to be fuchs. First off, can anyone confirm if the tire racks size is the correct original? if so, this means someone swapped them for 16's at some time. Is there a simple way to tell if the are original fuchs? the tires that are on their seem to work fine, so barring any concern I'm figuring on relacing them with the same size.

I have wondered about the odometer ready, as it seems to be adding up miles quicker than I figure it should. Given the difference from stock, it will be out of calibration. I thought is if I figure out the diameter of the stock wheel, figure out the diameter of my wheels and divide the stock size by the difference I should come up how much it is out of calibration, does this sound correct? Given that stock is 15's and these are 16's I would think it adding miles slower than actual but I'll crunch the numbers and see what I come up with.

Are you sure you are just not having more fun than you think?

Check my earlier post #14, it gives you a link to a tire size calculator that allows you to compare tires and it's impact on odometer/speedometer readings.

Lastly, I'm sure these topics have been discussed before. Can anyone tell me how to search the message board to find out what threads this topic may have been discussed in?

Thanks again.

If you look towards the top of the Web page, there is Blue bar that has the word SEARCH on it. Click that and a box will drop down. In the text box, type in some key words and hit ok. For more advanced searches, hit the link labelled "ADVANCED SEARCH" and then you get a form to fill out. To look for an exact phrase, inclsoe the words in quotes "like this".