Tire Load Rating?? 740iL

[roushstang99]

What is the lowest tire load rating would you use on your 740iL with aftermarket wheels?? OEM is 100 but seems like it may be a little overkill if I'm reading the index charts right. Had a blow out today and went to Discount Tire to get a new one but of course the didn't have what I needed and said they had a little bit bigger size but could only go on the front of the car but since the bad one was on the rear they wouldn't swap it around. So I'm going another route but I don't want to have the same issue again. 235/35/ZR19 91W rating now on the car.

[Jamos]

Load rating . . 100? You mean 100psi!?

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Well DIDN'T I JUST learn something new!

https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35

Had no idea load rating was a thing, never really had to worry about it. I mean I knew it was a thing but not what 93W would mean for instance.

[roushstang99]

Yeah and trying to figure out what the load rating for the different sizes gets confusing, I thought I would be ok with the 91 rating dividing up the weight on the car according to the index charts but I guess I was wrong.

An example: a P205/50R15 Standard Load tire has a load index of 84 and a load rating 1,113 lb at 35 psi. A P215/50R13 with the same load index of 84 only has a load rating of 1,091 lb, also at 35 psi.

[gaspump]

My new tires state they have a 1665 pds each rating. Thats good.