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      08-13-2019, 06:20 PM   #1
aahko_kord
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Front Tires Help!!

Hey guys, I have a 2012 Competition pack and I need new front tires. Iím running 255/35/19 up front and 295/30/19 rear both on Pilot Sport 4s. I want to bump up the fronts to 275 but Iíd have to drop to a 30 sidewall instead of 35 but Iíve had people tell me thatís a bad idea. Idk too much about sidewalls so could someone explain to me why itís a bad idea or why it would be ok. Also Iím doing a track day soon if that helps with context at all. Also if itís a bad idea, would 265 be the most I could go while keeping a 35 sidewall?
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      08-13-2019, 10:51 PM   #2
msan
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Well the front rim is 9Ē wide and stock is a 245 tire. You are adding more than an inch to the tire width with a 275. Just doesnít seem like a great idea from a wheel/tire width perspective. Ignoring the sidewall question altogether.
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      08-13-2019, 11:06 PM   #3
roastbeef
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I'm running 275/30/19's on my competition wheels without any problems.
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      08-13-2019, 11:23 PM   #4
aahko_kord
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Quote:
Originally Posted by roastbeef View Post
I'm running 275/30/19's on my competition wheels without any problems.
I understand you can run a 275 just fine with a 30 sidewall but I've heard dropping down to a 30 sidewall upfront isn't good for track performance. Any advice regarding that?
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      08-14-2019, 12:24 AM   #5
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Quote:
Originally Posted by aahko_kord View Post
I understand you can run a 275 just fine with a 30 sidewall but I've heard dropping down to a 30 sidewall upfront isn't good for track performance. Any advice regarding that?
19's aren't ideal for track performance anyways. the thinner the tire, the more precise you have to be with hot tire pressures. if you don't know what you're doing, you'll spend the whole day chasing tire pressures or not knowing why they car doesn't feel right (if you're clueless).

the middle number of a tire size is the aspect ratio of width to sidewall height. the overall diameter difference between a 255/35 and a 275/30 is about .4". in the context of radius, it's even less of a difference.
so, is a wider tire more beneficial than a tire with more sidewall? might be debatable.

my 275/30/19's fill out my front competition wheels great, but i'm not tracking on them, so it is difficult to give advice with that application in mind. i think i would value more tire over more sidewall though.
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