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When I fill in my made rolling-circumference calculator, it gives with your given sizes in opening post 9.29% lower speed given, so almost 10%. And mayby even in old situation not exact speed given. So does realy slower axle-rotation give higher speed given? Where is the sensor situated at...

Mayby you overlooked that the rolling-circumference is not the circumference of tire. Most calculators on internet give circumference as rolling circumference. But rolling-circumference smaller, and dependend on deflection of tire. I estimated deflection in normall use to be 15% of free...

Mind that LT tires need higher pressure for the same load then P-tire in same size. Can go upto 15 psi more, going from Standard load P-tire ( AT 36 psi) to LT E-load ( AT 80 psi) You could calculate the lbs/psi and see that its less for the AT 80 psi LT, then the AT 36 psi. But nowadays often...

On picture of post #23, I saw LRE , and those have referencepressure 80 psi, in verry large sizes 65 psi, so small chanche I am wrong. So its LT, and not P-tire, as I expected. Made cold pressure/axleloadcapacity- list For the 295/70 R18 129S Maxload 1850 kg / 4080 lbs AT 80 psi upto 160 kmph...

Found your size with google to be 129 S This could be yust P-tire AT 35 psi or XL/reinforced/extraload AT 41 psi If so on sidewall only max allowed cold pressure is given of between 44 psi and 51 psi. On LT tires only referencepressure is given behind AT mostly, so searc for that, and give it...

If you go from OEM P-tires, wich are allowed to carry maxload up to 99mph AT 35 psi, to LT E- load AT 80 psi, you need about 20 psi higher pressure for the same load as the P-tires. But mostly OEM adviced pressure is 35 psi, because reference-pressure of P tire, and not calculated for the...