ATSELLAB wrote:Interesting.. I have a 4x4 truck that i haul the hell out of it and it doesnt have a TPMS and eye balling is just fine. I still dont get the "Need" for it.
Depending on the height of the sidewall, this may work okay. With your high truck tires, that is probably relatively easy (but see below too). However, with low aspect ratio tires, it is not that easy - you can easily get a wide variation in pressure without seeing it as being low! Check it out for yourself sometime.
With the large diameter wheels that people are going for nowadays, the aspect ratios are dropping to "XXX/35" or less. On these tires, it only takes a remarkably slight loss of air for the pressure to be too low, and you cannot eyeball them to check!
Remember the whole Ford-Firestone tires saga? That was caused by low inflated tires overheating at highway speeds and blowing out and killing people. (My opinion: cleaning of the gene pool, but that is harsh, of course.)
Anyway, hence, TPMS became the "thing to add" as a result, and is (if not already) going to be mandated by the Federal government.
If you use a good tire pressure gauge every week to other week, with a home pump - foot or electronics, and make sure that the tire pressures are correct, then TPMS is overkill, I agree. However, for the average population, it is a safety net because they are lazy about basic automobile maintenance - I hope that is not true of the folks who frequent our forum!
Z
P.S. Eyeballing tire pressure is analogous to police eyeballing your driving speed! You sure would not want a ticket based on that.