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18" Tire load index

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Old 02-04-08, 01:02 PM
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benz23
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Question '06 IS350 sport tire question

Hey all,

I'm debating between getting the Goodyear Eagle F1 A/S or Michelin Pilot Sport A/S. While utilizing the search function to get people's opinions of the two tires, I came across a post that talked about a tire's load index (can't remember which exact thread).

The person was favoring the Michelin's with a service description of 88Y(front) and 95Y(rear) and said to stay away from the Goodyear's load index of 92Y(front) and 99Y(rear) since the load index differs from OEM Dunlops of 88Y(front) and 95Y(rear).

Also, I notice the Goodyear's have a load rating of 'XL'. Will this really make a difference considering I have the sport-tuned suspension?

Thanks for the help in advance.

Last edited by benz23; 02-04-08 at 04:07 PM.
Old 02-04-08, 01:09 PM
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mitsuguy
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nothing wrong with going "up" in load index... going down may mean overloading the tires, but going up does nothing bad...

for instance, OE is 92, you can go to 94, 96 or above without any issues whatsoever...

however, if you go below 92, then you may be overloading the tire, and any responsible tire should wouldn't mount them to start...

there is one difference however, and thats that load carrying at certain pressures may change from one tire to another, if going from a p-metric tire to a euro-metric tire...

p-metric: p205/65r-15 92v
euro metric: 205/65r-15 92v

extra load tires may also require different pressures to ensure correct weight carrying...
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