2000 TOYOTA TACOMA User Comment / Complaint

We purchased 4 lt235/75r 15 lrc big foot a/t dual tires at $172.79 a piece 3/14/06, spending $787.31. sunday 6/24/07 on highway 40 at a speed limit of 75mph, the right front tire blew out, almost flipping us over, which would have created enormous damage to ourselves and our vehicle. luckily, i stabilized the vehicle and pulled off the road. tuesday 6/26/07 we went to big o tires at 2010 e. lake mead blvd, north las vegas, nv to get a replacement. manny was apparently unable to locate a replacement tire, despite checking throughout las vegas and california. how can big o sell tires with a supposed guarantee when they can't locate any such tires with which to replace them? this morning manny put on another brand tire, supposedly of equivalent value and durability. it is a p, not lt, tire?how is that equivalent? it has a speed rating of s vs. the rest of the tires have a speed rating of q. and on the big o tire web site it states, ?never mix tires with different speed ratings, as this may cause serious handling problems.? so much for equivalence! furthermore, it is a spector advanta tire, and i can find absolutely no information on the internet as to who makes this tire. what kind of warranty am i going to have on the tire? i have another toyota truck, which also had a tire blow-out, the day after the one mentioned above. these tires came with our above truck and were not big o tires. the store manager suggested the tires were starting to dry rot, so therefore i purchased 4 brand new tires from him for that truck. he sold me prime well tires, and i had to pay for a road hazard warranty, which would have been included in a purchase of big o tires. he?s checked off that it?s a three-year road-hazard 40,000 mile warranty. in the small print it says, ?every new tire sold by big o tires?carries a manufacturer warranty against material and workmanship?? is that the mileage warranty? by the manufacturer, giti, in china?