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Old 08-14-2020, 09:56 AM   #1
avalonandl

 
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275/40/19 or 285/35/19

Looking at these two size tires for my 2017 SS on my new wheels. 19 x 9.5 +25

The 275/40/19 actually keeps closest to the stock diameter.

Any experience with these.... Thanks in advance...
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Old 08-14-2020, 10:21 AM   #2
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For 9.5" tires...
https://i.stack.imgur.com/jHVET.png
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Old 08-14-2020, 10:31 AM   #3
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Ya you're wider than the recommended width's there if that matters to you. That 285 contact won't be "285" when mount on a rim that is too narrow for it. Can be done, not recommended probably. 9.5 was a poor choice if you wanted wider tires.
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Old 08-14-2020, 11:02 AM   #4
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The 9.5 inch width will fit a 275 tire no issue and still be in the recommended widths.
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Old 08-14-2020, 12:57 PM   #5
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Quote:
Originally Posted by avalonandl View Post
The 9.5 inch width will fit a 275 tire no issue and still be in the recommended widths.
so why are you here
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Old 08-14-2020, 02:23 PM   #6
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Quote:
Originally Posted by VinnAY View Post
so why are you here
Tapping into the Camaro6 knowledge base....
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Old 08-14-2020, 03:02 PM   #7
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I'd prolly go for the 275/40/19.
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Old 08-16-2020, 12:29 PM   #8
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Quote:
Originally Posted by avalonandl View Post
Tapping into the Camaro6 knowledge base....
You should also look into the load ratings, and if possible avoid using a tire with a lower load index than whatever your car's OE tire size(s) were.

XL and SL load indexes are not the same (this matters), and small differences in rated load can be accommodated via slightly different inflation pressures. A 275/40 is actually a bigger tire than a 285/35-19 in terms of load capacity at any given pressure is concerned


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Old 08-25-2020, 10:36 PM   #9
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Michelin's website says 285/35/19 will fit on a 9.5" rim; that is actually the min. recommended width, so assuming whatever tire you buy is similar, there's likely no issues there.

That said, the 285/35/19 are 0.8" smaller diameter than the 275/40/19, and therefore your fender/wheel gap will get larger due to the smaller tire, and your speed will be off if the stock height is closer to the 275/40/19. Additionally, for a given width, a smaller diameter tire has a smaller traction patch, so the actual gains of going to the 285 would be somewhat offset by the 35 profile compared to the 275/40.

I would like 285s but don't want the smaller dia. tire, I wish they made a 285/38/19 - I'd buy that.
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Old 08-27-2020, 07:03 AM   #10
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Quote:
Originally Posted by Idaho2018GTPremium View Post
Michelin's website says 285/35/19 will fit on a 9.5" rim; that is actually the min. recommended width, so assuming whatever tire you buy is similar, there's likely no issues there.

That said, the 285/35/19 are 0.8" smaller diameter than the 275/40/19, and therefore your fender/wheel gap will get larger due to the smaller tire, and your speed will be off if the stock height is closer to the 275/40/19. Additionally, for a given width, a smaller diameter tire has a smaller traction patch, so the actual gains of going to the 285 would be somewhat offset by the 35 profile compared to the 275/40.

I would like 285s but don't want the smaller dia. tire, I wish they made a 285/38/19 - I'd buy that.
I am definitely ordering the 275/40/19 's and they are VERY close o the stock diameter....
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Old 08-30-2020, 08:32 AM   #11
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Ordered the Firestones and new TPMS....
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Old 08-30-2020, 09:17 PM   #12
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Wider is better. 275 is too narrow and from the rear looks like a base V6
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Old 08-31-2020, 08:30 AM   #13
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Quote:
Originally Posted by Markoz28 View Post
Wider is better. 275 is too narrow and from the rear looks like a base V6
275 is the stock width.
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Old 09-04-2020, 08:10 AM   #14
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Tires and wheels are mounted. No issues...car is dirty will get it cleaned up.
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