Widest tire size to put on base 18" rims with spacers ? What size?

ChopsZ

Is that really the widest that can fit on the stock 18's, or is that just what people have done because it's more cost effective (moving stock rears to front wheels then buying 275's for the rear).

I'm actually wondering if you can safely fit 255/45 and 285/40.

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dvboy

You could fit 305's on the rear rims if you really wanted to force them on there,but it would look silly.If you look at the rim width recommendations for the 275's,the manufactures require a MINIMUM width of 9" which is exactly what the base rims are.For the 245's up front an 8" wheel is the minimum width recommended by the tire manufacturer,and again that's what the base rims are.I find the sidewalls look good and don't bulge too much,but even 285's in the back might be pushing it.Just stick with 275/40's in the back,they are the proper height exactly,285's will be a little taller.Having said all that,there isn't much difference between 275's and 285's

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