What loadrange is your new LT

C-LOAD AT 55 or 50 psi

D-load At 65psi.

E-Load AT 80 psi.

Read back and already saw E- load is loadindex 123

35psi was the reference pressure of Standard load P-tire( the given list here gives 36psi, used in european system) and is nowadays often given. If calculated with the official european formula with use of the GAWR's , best with a reserve first added, pressure most likely lower.

But OK, I will calculate what maxload belonging to loadindex 116 = 2750lbs would calculate for E- load LI 123= maxload 3420lbs AT 80psi.

Gives 60.9 so 61 psi.

And thats 25 psi higher!!!

But again, if calculated with GAWR's it can probably be lower , mayby Capriracers 36+15= 51 psi.

I used the official european calculation, wich is since 2006 also used in US for P-tires, and should also be used for LT.

You also go 1 speedcode back ( from T to S. Rule is that max speed of tire must be the same or higher then max technical car speed. Even if you never use that speed.

I went with my calculation from pressure calculated for 99mph( 160kmph) wich is the speed the maxload is calculated for, from speedcode Q to V.

This could give some difference, I dont know for what speed your pressure is determined.