Cheme1985

Has anyone successfully installed 13" wide rear wheels on a GT/GTS? I've seen 12/12.5" setups, but can't find any with 13".

I'm going to larger turbos and want the widest R888R's I can get on the rear.

I have 13" wide wheels with 345/30R19 R888R and that works well on my viper.

Acta_Non_Verba

Hi Cheme,

This is a curiosity question and doesn't yet get to your issue, but since you're building HP/Torque, how are you using the car?

Thanks,

Cheme1985

Roll racing and air-strip runs.

Acta_Non_Verba

OK, got it. I was curious if you were looking for wider tires BC of contact patch, but unless you're breaking loose you wouldn't/shouldn't experience this in roll racing or longer distance air strip runs.

It's a misconception, wider tires do not increase contact patch. Contact patch real estate is a function of air pressure and weight applied to the tire through the axle. Within a range of tire widths, the contact patch will maintain the same sq. area just the profile or shape changes. To get an increased contact patch you have to reduce air pressure, and/or, increase weight.

All the best,

Edit: Sorry, cannot answer your Q about will the wider wheels work...no experience there on this platform.

UCIMBZ

Be ready for some "wife's 13" rear" advice too.

dlefty

Since 12” is a proven fit with no rub size on GT/GTS, why not stick with that since the R888R 345/30-19 approved rim width is 11.5-12.5 and their spec measure width is 12”.
offset is going to be key as well to keep any rubbing to a non existent or minimum level depending on ride height and camber.

MalibuScott

When proofreading fails. (I hope his wife is more than 13 inches wide.)