93redFD

whats the widest tire I can use on a 18X9.5(safely)?? what about 18X10. I dont know anything about tires or wheels so need a lil help

ARD T2

iTrader: (22)

For what vehicle, car, and offset please?

These all will indicate what tire width to use. As certain widths are limited to certain profiles/aspect ratios. If starting from scratch we can walk through your functions and get a picture of what you're seeing in your head.

Rishe

maxcooper

The process is to look at tire spec sheets and find sizes that are about the same diameter as stock. Try to stay in the 24.6" - 25.3" range, stock is about 24.8" and larger diameters generally increase the chance of rubbing. The other thing to check is if your rim width is within the recommended rim width for the tire model you are looking at. Diameters and recommended widths vary from model to model a bit, so look at a few different models to see which ones meet your needs the best. Spec sheets are available on the TireRack.com web site and on tire manufacturers' web sites.

285/30-18 is a good size for 18x10 and some models work on 9.5" rims, too. 255/35-18 or 265/35-18 are some other popular 18" tire sizes.

This all assumes that you have an offset of about +50mm. You might have other considerations to make with different offsets (width and/or diameter constraints to help avoid rubbing). Stiff springs, removing the fender liner screws, stiff front sway bar, reasonably high ride height, smaller diameter springs (2.5" coil-overs instead of stock-style springs) etc. are things to be aware of in the quest to avoid rubbing.

-Max