Join Date: May 2014
Location: San Andreas Fault Zone
Mentioned: 130 Post(s)
Tagged: 0 Thread(s)
Quoted: 1331 Post(s)
Re: tire sidewall flex question
" ...mountains ... curves ... a ball in our Porsches ..."
Since you are installing Terra Grappler tires on your FJ, and you mentioned adjusting tire pressure for off-roading, it would appear that you have at least some concern about off-road performance.
The FJ is a big, heavy, tall, lumbering truck, not a lowered and stiffened 911. Anything you do to reduce body roll with the intent of "improving cornering" on the street will adversely affect articulation and usable suspension travel off-road.
Optimize your Porsche (what model is in your garage?) for street use, and optimize the FJ for the best performance off road, without too severely sacrificing basic, safe handling on the street.
Being able to adjust tire pressure when transitioning from street to off-road to street again is almost essential; a portable or on-board air compressor will be one of the most useful tools you can have if you are at all serious about off-roading.
I keep my "E" load range KO2's at 45 PSI on the street, and at 18-20 PSI off road. Decently crisp "handling" (for a tall truck) on the street, and great traction and pretty compliant ride off-road over washboard and rock.
Trying to do anything off-road at 45 PSI on E-range tires will quickly set you up for a new pair of kidneys.
Last edited by FJtest; 08-12-2019 at 01:14 PM.