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      10-13-2011, 05:43 PM   #1
hoeferland
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Pros/Cons of running 245/35/19 and 275/30/19 instead of stock sizes

Hi all,

I need to replace my stock PS2's with Pilot Super Sports, but Tire Rack is back ordered for 2 months on the stock size rears...so I'm pondering a change to 245/35/19 and 275/30/19's, but am wondering what the pros/cons are of the switch beyond the visual change.

Any help would be greatly appreciated.
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      10-13-2011, 06:02 PM   #2
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275/30 rears are too short... you should go 275/35. I ran that and the difference from 265/35 is very small from a visual perspective and gives only a slight improvement in traction.
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      10-14-2011, 11:47 AM   #3
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Too short? That's what PY Speed recommended. In any case, it seems like you were happy with the change, correct?
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      10-14-2011, 12:03 PM   #4
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You're one of several people who have posted this question. I suggest some searching.

Also consider different tires. PSSs are nice, but they're not exactly in a class of their own.
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      10-14-2011, 12:39 PM   #5
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275s will give slightly more drag, but won't give any more traction. Best to wait for the 265s to come in unless you want the visual.
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      10-14-2011, 12:57 PM   #6
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245/35 275/35 will be better than 275/30

if you must do a 30 series profile, do a 285/30
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      10-15-2011, 07:40 AM   #7
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The potential issue I see, the rear would be a slightly smaller OD than the front. Since DSC is programmed with a larger rear OD, the wheel rpm is going to be indicating wheel spin (in error) much earlier, so if you use DSC, you may see it activate prematurely. I use a set of 275/35-18, and I can detect a small difference in DSC activity with equal sizes all around. I use them mostly on track with DSC off, so it's not an issue. I suggest using the 255/35 and 275/35 combination on your OE 19" wheels.
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      10-15-2011, 01:53 PM   #8
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Quote:
Originally Posted by llis View Post
You're one of several people who have posted this question. I suggest some searching.

Also consider different tires. PSSs are nice, but they're not exactly in a class of their own.
IMO, the PSS is pretty much in a class of its own as a street performance tire as it gets everything right (right, quiet, responsiveness, grip, wet). If you are using the tires on the track, then I agree that the RE-11 and AD-08 are better.
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      10-15-2011, 07:38 PM   #9
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Quote:
Originally Posted by hoeferland View Post
Too short? That's what PY Speed recommended. In any case, it seems like you were happy with the change, correct?
275/30 is too short. Do the math yourself. 265/35 has a 14mm greater rolling diameter than 245/35. 275/30 has a 20mm lower rolling diameter than the stock 265/35 so it is actually smaller than the fronts.

You could go:

255/35 and 275/35

255/35 and 295/30 (This will give you equal F/R rolling diameter)

245/35 and 285/30 (This will give you equal F/R rolling diameter)
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      10-16-2011, 08:40 AM   #10
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Great feedback everyone. Yes, I've searches across the threads, but wasn't finding the feedback I was hoping for. This all helps and $ aside I do feel the PS2s and PSS are the best tires for mixed use (primarily street with occasional hot laps at the track).
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