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Discussion Starter · #1 ·
I have 20" Champion Motorsports wheels on my 2014 CS. Love 'em, but the diameter reduces my tire choices. I'd like to upgrade to R-compounds as I use the car mainly on the track. Will going down to 18" cause any problems? My ECU has been decrypted and reflashed by TPC Racing, and I also wonder if the smaller wheels would cause a problem with the reflash.

Lastly, are there any other benefits to going with the smaller wheel?

Thanks in advance from Virginia,


CGH3
 

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As long as they fit over your brakes and you maintain the F/R tire diameter stagger you should be fine. Where folks get in trouble is ignoring tire diameters and making the PSM overreact.
 
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As long as they fit over your brakes and you maintain the F/R tire diameter stagger you should be fine. Where folks get in trouble is ignoring tire diameters and making the PSM overreact.
Exactly. As long as proper overall tire diameters are retained, the cars electronics would know no difference of the wheel diameter. 18" wheels will definitely open up many more R comp options (Nitto NT01's are great for example).

We have a number of great 18" wheel options to choose from if you're looking to get into a more track suited wheel!

-Wray
 

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I have a '14 CS with 18" track wheels and 20" streets wheels. No issues. You can set which size wheels you're using in the settings menu
 
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