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Originally Posted by tlim
I am running 20 inch Michelins, 275/40s and was wondering what is the correct tire pressure to run on my C. Using the 'factory' tire pressures as reccommended for the 18 inch rims would seem to be too low. Any suggestions on what tire pressure I should run.
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I would actually contact Michelin for their recommendation(s)? Also, have you possibly asked the facility (tire/wheel shop) which initially installed your tires/wheels how much air pressure they utilized, as well as how and on what documentation they in fact based their determination on in the first place? The maximum psi rating for my 20" Goodyear 'F1 Supercar' tires is 51psi, but I'm only running 40psi...which appears to be more than efficient.
