Tyre pressure tuning

[Dev]

Assuming width/profile etc the same.

If the 86sl tyre had an oem inflation of 28psi. To obtain the same with the 86xl. The yoof should be advised to inflate to 32psi.

Dunce cap and flame retardant pants at the ready.

 Without getting into tire widths , profile or inflation pressure. We need to assume that the OEM load rating  is correct.  But lets say for argument sake the inflation pressure for the OEM is 32 psi.

  Try again.
   A, B, or C



 
 

[Ardent]

with the now added info of 32psi. Now fit and inflate to 37.

[Dev]

with the now added info of 32psi. Now fit and inflate to 37.

Correct. Basically as long as the load ratings numbers match or the new tires load reading is higher it's  good.
 The only difference is the XL tires need more air to hold the load. I think they do this so tire shops don't mess up but they eventually do because they fill it to factory air pressures.