jadatis

Found your topic , searching Google for tire-pressure-calculator. Been busy with calculating that with use of the European formula, I once got hold of and worked out. Learned myself Excell, to make spreadsheets for it and translated a few from Dutch to English to go worldwide with it. What you do with your calculation is not so wrong, gives slightly higher pressures then absolutely needed. For much lower loads then maximum even a lower pressure is save for the tires. https://skydrive.live.com/?cid=a526e0eee092e6dc#cid=A526E0EEE092E6DC&id=A526E0EEE092E6DC%21128 Yus look around on my public map of skydrive wich belongs to my hotmail adress with the same username as here. Many spreadsheets and articles. One of an American J.C.Daws. with new system and comparison with the old power formula and its diferent used powers in Europe and America You can navigate yust as in a forum . and if you want to download a document click at the end of the line on I in blue and on the rightbarr click download . Then open it in Excell or compatible program to use it. The browser cant handle it because of sheetprotection and datavalidation I used in most of them. Greatings from Holland Peter --- Update to the previous post... To fill in the exactly weighed loads on per tire in the formula is somewhat dangerous. You always have to use some reserve for misreadings of weight and pressure, but also for incidental extra load or loadshifting and pressureloss in time. But if you take to much reserve, things go bouncing. That is why I introduced the load-percentage or gripp-percentage. This is what the real weight is of the weight you calculate the pressure for. Example : assumed "real"weigt 850 lbs/kg watever, wanted Load% ( L%) 85%, then calculate the pressure for 850/0.85= 1000 ( coincidently? no?). then the percentage of the surface on the ground is also 85% as it would beif 1000 was on the tire at that pressure. Never go over 100% L% , gives tiredamage at higher speed. 100% gives maximum gripp and comfort , without damaging the tires. 95% gives the least tire-wear. 90% gives a little more tire-wear, the same as 100% 85% is the border under wich discomfort begins by bouncing. 80% is as low I dare to go for trailers with no persons or animals in it. Lower screws come loose. Mind that this is my own estimation, concluded by reactions. The lower the L% the less fuel-consumption , comfort, and gripp. The higher the L% the more gripp and comfort , and also more fuel consumption. A tyre-specialist in Holland , Profile, writes that 25% to low pressure gives 10% more roling resistance, and by that 2% more fuell- consumption, so what are we talking about. I work with L% and not with % higher pressure, because it gives a better idea about the gripp-surface. For lower L% you need higher pressure, mayby somewhat confusing.