Butch, My 4 blowouts were probably my fault for going too fast on hot days, but one was right off of a freeway off ramp and I wouldn't have known until we were down the road a bit, probably with more damage. The others were all while driving freeway speeds on back roads, but the alert saved me from significant damage as I was able to pull over right way...prior to most of the sidewall falling apart. In each case the tire completely failed, but a 10% loss of pressure will also trigger the alarm (need to check as there are two alarms based on percentage of loss). In sort, you don't need to lose all the air for the alarm to sound. In my case, it's just piece of mind. Two of those blowouts I heard, 2 I heard nothing. I only had the alarm for one of those, so it did save me from certain damage. Either way, best of luck in your selection. I think based on what I heard from others, I might go with the TST system next time due to the temp readouts.
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