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-   -   Tire Sizing? (https://www.audiworld.com/forums/audi-a5-s5-rs-5-coupe-cabrio-219/tire-sizing-2966791/)

MadTrapper 02-06-2019 08:28 AM

Tire Sizing?
 
I have a 2014 A5 Coupe Quattro. 2.0 TFSI base model. My speedometer over reads as 130 Kph is an actual 126 Kph. I think I see the problem. They specced the bigger wheels on the S-Line and they are probably more like accurate? Can anyone confirm this as I am now looking for some 19" wheels to run summer tires on.
https://cimg3.ibsrv.net/gimg/www.aud...06ba85a6a7.jpg
https://cimg4.ibsrv.net/gimg/www.aud...d7cbf42e34.jpg

Wildcat UA 02-07-2019 06:43 PM

I don't think the tire size is the issue. By law speedometers can't read under the actual speed so most read 2-5 under.

MadTrapper 05-07-2020 02:17 PM

Done
 

Originally Posted by MadTrapper (Post 25272278)
I have a 2014 A5 Coupe Quattro. 2.0 TFSI base model. My speedometer over reads as 130 Kph is an actual 126 Kph. I think I see the problem. They specced the bigger wheels on the S-Line and they are probably more like accurate? Can anyone confirm this as I am now looking for some 19" wheels to run summer tires on.
https://cimg3.ibsrv.net/gimg/www.aud...06ba85a6a7.jpg
https://cimg4.ibsrv.net/gimg/www.aud...d7cbf42e34.jpg

So I replaed my 40 aspect ratio tires with 45s. That brought my speed to bang on accurate.

Winegazm 05-07-2020 07:56 PM

Hey heres a chart you can plug in different tire sizes and how it affects your speedo.

https://www.carbibles.com/calculators/


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