Question about the 4 PSI rule for tire inflation

[jjc54]

I run the Vred 205/60 set at 15 PSI with 13 oz Ride-on on the back and Vred 175/55 set at 17 PSI with 8 oz Ride-on in each on the front. I used a Jaco digital inflator to air the tires and the same to check the pressures at the end. I weigh 145# and was carrying minimal cargo. This latest trip was 230 miles and the last leg was 60 miles after a brief fuel and pee break. When I checked the pressure first thing, I only got a 1.5 PSI increase on the front and a 2 PSI increase on the rear. The fronts are basically new and the rear is at .25 tread remaining. Do I dare reduce the pressure on these tires or is using Ride-on making the 4 PSI rule no longer valid? I have absolutely no issues with handling. Could it also be a validation on how well these tires are constructed?

 

[Snoking1127]

I run 16 in my Vredestein fronts and 18-19 in my General out back. I ride both single and two up. I do not bother balancing the tires. This is a picture of the weights I just took on this low mile Kenda rear on the new to me 2018 RTL.

 

[BajaRon]

I have not done any tire temp tests. But I can tell you that Ride-On will reduce tire temperatures.

 

[Peter Aawen]

^^ See above!

I haven't actually tested the tire temps either, but I'd think that by adding Ride-on to the mix, you've probably at least markedly skewed 'the 4psi rule of thumb'!

Do you think you really need the Ride-on??