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      06-06-2010, 10:53 PM   #1
Day Laborer
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Need Tire Advice, 2 different load indexes 97 & 101

I received one rear oem tire for free from a friend who works in a BMW dealership. Fairly new; about 85% of thread life left.
265/45/18's PS2.. the load index/range on this oem tire is 97 Y

So i decided to buy another, fairly used tire from ebay and I am awaiting its arrival.. ($160, 85% thread left)
also the same PS2's but it has the load index of 101(Y)
looks like it was a Porsche OEM tire. (R3, P)

According to Michellin's website, both specs are all exactly the same, except for the load index/range.

http://www.michelinman.com/tire-sele...2/tire-details

265/40ZR18 25785 97 Y BSW 8.5 220 AA A 790 1609lbs@51psi N/A 26.3 9" - 10.5" 10.7" * BM(OEM BMW)
265/40ZR18/XL 99883 101 (Y) BSW 8.5 220 AA A 790 1819lbs@50psi N/A 26.3 9" - 10.5" 10.7" N3 P(OEM Porsche)



Can any experts here advise against this being mounted together as a pair?

I didnt' want to buy one brand new tire as the free tire i got has 85% remaining thread.. I wanted both rear tires to wear evenly, but didn't realize the load indexes were different.

Any advice would help!
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      06-07-2010, 02:52 AM   #2
SenorFunkyPants
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Quote:
Originally Posted by Day Laborer View Post
Can any experts here advise against this being mounted together as a pair?
You won't know for sure until you mount them and go for a drive...if the rear of the car feels unstable with full throttle and launches you into the scenery then you'll know it wasn't a good idea.
Second hand tyres off ebay on a $50K 400bhp car....Really???
Sorry not trying to be harsh but second hand tyres maybe OK for some old junker but not for an M3.

Last edited by SenorFunkyPants; 06-07-2010 at 04:59 AM.
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      06-07-2010, 10:53 AM   #3
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Putting them on for fall, not really planning much driving then. Brand new tires will be put in for next summer. . What can I do, it was one free tire in great condition. Gotta sieze the opportunity right?
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      06-07-2010, 11:10 AM   #4
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I guess...the trouble with ebay tyres is the possibility/probability that the used tyre has come off a wrecked car and may have internal damage to the tyre carcass which won't be apparent.
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