abdoulwane

Am I wrong to understand that I should have the following pressure on my 05 CL65 currently wearing Hankook Ventus V12

Front: 245.40.19 98Y (30-33 psi)
Rear: 305.30.19 102Y (40-44 psi)?

Please advise.

jadatis

I can make a pressure/axleload list for both tires.
Then you " ONLY" have to determine the axleloads acurate, the most tricky part in it all.
But first have to know if I am right that they are XL/reinforced/extra load, wich most low H/W division high speed tires are. Rest you gave already.
Then also give the maximum speed you use, and wont go over for even a minute, be honest, I am no police.

jadatis

Already googled your tires, and where XL.
So here list made with my determined extra safe formula. Safer even then the officially used in Europe for decades, and since 2006 also for P-tires in US. Then 90% used of calculated loadcapacity for the pressure for 99mph.
So max reserve with still acceptable comfort and gripp. In front of psi front tires, and behind rear tires, logical I think.
Can make list for for instance 149mph/240kmph too if wanted, yust give how you want it.

You could search back your GAWR's in the list, then you can drive 99mph safe fully loaded axles, but not overloaded.
Determining the right axleloads stays your responsibility.

Front axle/cold psi/ Rear axle load
90% 99mph/ cold psi/ 90% 99mph
1534 lbs/ 20 psi / 1740 lbs
1601 lbs/ 21 psi / 1815 lbs
1668 lbs/ 22 psi / 1891 lbs/ lowest EUR
1734 lbs/ 23 psi / 1966 lbs
1801 lbs/ 24 psi / 2041 lbs
1867 lbs/ 25 psi / 2116 lbs
1933 lbs/ 26 psi / 2191 lbs/ lowest US
1999 lbs/ 27 psi / 2266 lbs
2064 lbs/ 28 psi / 2341 lbs
2130 lbs/ 29 psi / 2415 lbs
2196 lbs/ 30 psi / 2489 lbs
2261 lbs/ 31 psi / 2564 lbs
2327 lbs/ 32 psi / 2638 lbs
2392 lbs/ 33 psi / 2712 lbs
2457 lbs/ 34 psi / 2785 lbs
2522 lbs/ 35 psi / 2859 lbs
2587 lbs/ 36 psi / 2933 lbs
2652 lbs/ 37 psi / 3006 lbs
2717 lbs/ 38 psi / 3080 lbs
2781 lbs/ 39 psi / 3153 lbs
2846 lbs/ 40 psi / 3226 lbs
2910 lbs/ 41 psi / 3300 lbs
2975 lbs/ 42 psi / 3373 lbs/ referencepress
3039 lbs/ 43 psi / 3446 lbs
3104 lbs/ 44 psi / 3519 lbs
3168 lbs/ 45 psi / 3591 lbs
3232 lbs/ 46 psi / 3664 lbs
3296 lbs/ 47 psi / 3737 lbs
3360 lbs/ 48 psi / 3809 lbs
3424 lbs/ 49 psi / 3882 lbs
3488 lbs/ 50 psi / 3954 lbs
3552 lbs/ 51 psi / 4027 lbs/ often maxcold
​​​3616 lbs/ 52 psi / 4099 lbs
3679 lbs/ 53 psi / 4171 lbs
3743 lbs/ 54 psi / 4243 lbs
3806 lbs/ 55 psi / 4315 lbs
3870 lbs/ 56 psi / 4387 lbs
3933 lbs/ 57 psi / 4459 lbs
3997 lbs/ 58 psi / 4531 lbs
4060 lbs/ 59 psi / 4603 lbs
4124 lbs/ 60 psi / 4675 lbs/ sometimes mcold