put my 19.5s on today
I got fed up with delays and excuses from Rickson and I leave for a long road trip in two days so I canceled and had Les Schwab in Livermore order me 4 19.5 Vision rims and TOYO m143s in 245/70R195 90...
Forum Discussion
twodownzero wrote:
You clearly have the experience, but perhaps didn't realize the difference it makes. A tire at the 4-7 psi you mention has at least double, if not more, the contact patch of a tire at street pressure, because the bottom portion of the tire flattens out. Get out a ruler and measure it. You'll be surprised to learn just how long the contact patch actually is when a tire is aired down even on a flat surface. It also depends on how big the tire is, but that is also a reason that a larger diameter tire, all else equal and even ignoring the ground clearance advantage, has lower contact pressure.
I have, they do grow quite a bit but not triple, at least not in my experience.
Running 35" KM2's, 32" TSL Radials, or 33" TSL Bias I never saw that much contact patch change, but it does get a bit bigger.
That was also on fairly light Toyota's.
