Tire question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

LEADfoot927 · 01-26-2010, 06:20 PM

As we all know the stock SS rear tire size is 275/40/20. I found a great deal for michelins but the size is 275/35/20. Will the 5mm difference make any difference or cause damage?

Garrett · 01-26-2010, 06:47 PM

These are things to consider as you compare your choices. That will be a shorter tire in overall diameter at 27.6 inches so your revolutions per mile will change. Factory tires are 28.7 inches. The Difference effects the antilock brakes, Gas mileage, gear ratio and speedometer to name a few. Also since it is more than an inch lower it will ride somewhat harder.
In addition you will also loose load carring capacity. Factory tire carries 2094 lb per tire load capacity. The michelin is 1874 lb per tire. I personally would consider an alternative that would be within a halfinch or less difference in overall diameter.

Toasty · 01-26-2010, 08:42 PM

the middle number (40/35) is not a measurement, it's a ratio, or percentage-- meaning that the height of the sidewall is 40/35 percent of the width. that being said, the difference between the two sizes is too large. the difference needs to be less than 3% or half an inch in diameter.

OUR72GTO · 01-26-2010, 10:06 PM

These guys have it right.

Nine Ball · 01-27-2010, 08:05 AM

Just answered this in another thread:

http://www.camaro5.com/forums/showthread.php?t=62811

Hope that helps!

01-26-2010, 06:20 PM	#1
LEADfoot927 Drives: 2012 GT500 SVTPP Join Date: Nov 2009 Location: Fort Lewis, WA Posts: 448	Tire question As we all know the stock SS rear tire size is 275/40/20. I found a great deal for michelins but the size is 275/35/20. Will the 5mm difference make any difference or cause damage?

01-26-2010, 06:47 PM	#2
Garrett G-Man Drives: 2ss Aqua Blue Mettalic Join Date: Dec 2009 Location: Illinois Posts: 152 View My Garage	These are things to consider as you compare your choices. That will be a shorter tire in overall diameter at 27.6 inches so your revolutions per mile will change. Factory tires are 28.7 inches. The Difference effects the antilock brakes, Gas mileage, gear ratio and speedometer to name a few. Also since it is more than an inch lower it will ride somewhat harder. In addition you will also loose load carring capacity. Factory tire carries 2094 lb per tire load capacity. The michelin is 1874 lb per tire. I personally would consider an alternative that would be within a halfinch or less difference in overall diameter. __________________ G-Man

01-26-2010, 10:06 PM	#4
OUR72GTO 2010 SIM Beige RS 6M Drives: SIM RS 6M 66 Corvair Silverado LTZ Join Date: Oct 2008 Location: Kamloops,British Columbia Posts: 4,677	These guys have it right. __________________ CAMARO.. 2010 The Heart Beat is back in CHEVROLET Now let's put it back in America

01-27-2010, 08:05 AM	#5
Nine Ball Drives: 1969 & 2016 Camaro SS Join Date: Oct 2008 Location: Houston, TX Posts: 3,849	Just answered this in another thread: http://www.camaro5.com/forums/showthread.php?t=62811 Hope that helps! __________________ Fquick.com/NineBall

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01-26-2010, 08:42 PM	#3
Toasty Custom User Title :D Drives: 2011 Summit White 2LT/RS Join Date: Dec 2009 Location: Bolingbrook, IL Posts: 2,342	the middle number (40/35) is not a measurement, it's a ratio, or percentage-- meaning that the height of the sidewall is 40/35 percent of the width. that being said, the difference between the two sizes is too large. the difference needs to be less than 3% or half an inch in diameter.