Onyourmarc12

I have 2008 Boxster S Limited Edition and original load size for front tires is 87y. Tread is low (3/32) on passenger side so I got replacement but they don’t make 87y anymore so I got 91y. Am I gonna run into any issues with my driver side front tire load rating being at 87y and my passenger side at 91y? Will I be fine until the tread runs lower (currently at 5/32) on driver one and I replace it to match the 91y? They are very close in load size and is higher as opposed to lower than 87y so I know I’m fine in that respect but I get ideally they should both match. Will there be handling issues or will it not even be noticeable at all?

Thanks

jscott82

You don't mention the specifics, and I probably would not know the implications if you did.... but it sounds like a completely different tire. Composition, compound, tread are probably different as well....

Will you notice the difference? Probably not under normal driving conditions... the differece would be noticeable as you approach the limits of the tire though, on the track or in an accodent avoidance manuver.

IMHO, it's a false economy to replace a single tire, they should be replaced as a set of 4, or at a minimum each axle.

Onyourmarc12

So both tires Michelin Pilot Sport PS2 235/35zr19 but the only difference is the current driver front side is 87y (original tire with vehicle) and the new tire I have to put on passenger front is 91y in terms of the load size. Only difference is the 87y vs 91y. Don’t plan on any track usage. I agree it makes sense to replace both fronts at same time but there’s still some useful tread on other tire. Maybe I should get another 91y for driver front and then use the 87y as spare?

old man neri

If one side is 5/32 and the other is 3/32 just replace them as a set. Don't just replace one. You know what's worse than poor grip? Next thing you might want to do is figure out what one side is more worn than the other. How are you measuring them and where?

jscott82

As in 16 years old?????

Onyourmarc12

Oh no…original as in the tire specs the car was originally made with (87 load size that is no longer made).

Onyourmarc12

Took the car to shop for yearly oil change and they did an inspection and that’s where they said tread is bad on one tire. Both my rear tires are 7/32. Also getting an alignment done.

Keith Guidus

Buy 2 tires that match....