Hit a pot hole and bent my wheel today, wondering if Its possible to put 40 series profile tires on 20 inches wheels without and rubbing or any other issue, need more protection on those wheels, dont really want to go 19 inches, need some advice thank you!
You basically have three options:
- increase the profile ratio to put more space between your rim and the road
- upgrade to stronger wheels -- forged being the ideal
- buy tires known for stronger sidewalls (Michelin is a reliable option in this regard)
Sorry to tell you this, but any car on 35- or 40-series rubber is going to run a higher risk of bent rims than one on, say, 50-series rubber. It's just physics.
Furthermore, I'm assuming you're running OEM 20-inch rims. Almost all Porsche OEM wheels are manufactured by BBS -- generally regarded as one of the top wheel manufacturers in the world -- and Porsche OEM rims are not know for being structurally weak in the same way that, say, BMW's wheels are.