Need tire diameter matching help - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

NoleLife · 02-09-2015, 07:48 AM

I'm getting new wheels (10in/11in wide for the front and rear respectively). The common setup seems to be

275/40
315/35

However, I don't really need a 315 in the rear (I don't race my car) and would like to avoid dropping 800+ on just the rear tires when buying wheels at the same time.

What are some other sizing options for the front and rear? I've tried the (Width) * (Ratio/100), and trying to find 2 numbers within a 1/4in of each other but for common ratios (30,35,40, and 45) there only seems to be the above matching set option.

So does anyone know a setup that would be a bit less aggressive, possibly with a 285 or 295 on the rear (if that's not too much of a stretch for an 11in wheel).

If it's doable (won't make my TCS or EST go ape-nuts) then I would be okay with mixing front/rear tire brands or types.

sbubbaklein · 02-09-2015, 07:55 AM

there is a sticky "recommended tire size for 2010 Camaro". It lists a whole lot of tire sizes and their overall dimensions, check it out

ST1LE · 02-09-2015, 07:55 AM

The 1LE and ZL1 come with the same 10in/11in setup as you mention above. The 1LE comes with 285/35's on all 4 corners. Even though it fits and performs well, it does have a stretched appearance that is not so easy on the eyes IMHO. The ZL1 comes with 285/35 up front and 305/35 in the rear. I would look for something in that range. You can also get the new Mickey Thompson Street Comp in 275 and 305, and they are extremely well priced.

I would not say that 275/40 and 315/35 are common, I would be a little shocked if they were just do to the poor functional affects it creates. I guess people like fat rubber in the rear, even if it hurts overall performance.

ST1LE · 02-09-2015, 07:58 AM

The 1LE and ZL1 come with the same 10in/11in setup as you mention above. The 1LE comes with 285/35's on all 4 corners. Even though it fits and performs well, it does have a stretched appearance that is not so easy on the eyes IMHO. The ZL1 comes with 285/35 up front and 305/35 in the rear. I would look for something in that range. You can also get the new Mickey Thompson Street Comp in 275 and 305, and they are extremely well priced.

I would not say that 275/40 and 315/35 are common, I would be a little shocked if they were just do to the poor functional affects it creates. I guess people like fat rubber in the rear, even if it hurts overall performance.

LOBBS · 02-09-2015, 08:19 AM

Quote:

Originally Posted by ST1LE

The 1LE and ZL1 come with the same 10in/11in setup as you mention above. The 1LE comes with 285/35's on all 4 corners. Even though it fits and performs well, it does have a stretched appearance that is not so easy on the eyes IMHO. The ZL1 comes with 285/35 up front and 305/35 in the rear. I would look for something in that range. You can also get the new Mickey Thompson Street Comp in 275 and 305, and they are extremely well priced.

I would not say that 275/40 and 315/35 are common, I would be a little shocked if they were just do to the poor functional affects it creates. I guess people like fat rubber in the rear, even if it hurts overall performance.

This combo is quite common as the overall heights are nearly identical. A squared setup is naturally more neutral but a staggered setup can handle just as well as with proper parts selection. There are countless cars on the road running a staggered setup that would be more than qualified to be called great handling.

NoleLife · 02-09-2015, 08:23 AM

A 285/35 and 305/35 combo wouldn't mess up the electronics due to different heights sizes?

Burt · 02-09-2015, 08:30 AM

If you get on Tire Racks website, or most of the tire manufacturers sites, and look up the tire you want, in the size you want, they'll give you the outside diameter in inches. For example:

Norm Peterson · 02-09-2015, 08:52 AM

No matter how you run the numbers, the staggered matching size for 275/40 ends up being 315/35 (the shortcut is 275 * 40 ÷ 35 = 314.3).

Aside from that, the two best options have already been mentioned. For ABS concerns, he 1LE's square tire sizing is probably just a little better suited to your SS than the ZL1's slight stagger, although the ZL1's tire sizes are (just barely) within a generally accepted 3% guideline. The ZL1 itself has almost certainly accounted for this in its ABS programming.

Still technically acceptable would be 275/40's all around - that size is actually OK'ed out to 11" wide rims. But if the 1LE's mildly stretched rear tire appearance bothers you at all, you wouldn't like this option at all unless it was your only choice under urgent circumstances.

FWIW, here's what 285/35's look like on 11" wide rims, photo angle chosen to exaggerate the stretch (you don't see it quite this clearly on the car). Michelin Pilot Super Sports with a mfr-claimed tread width of 10.2". They're 18's, but that doesn't affect the sidewall height or its shape.

Norm

NoleLife · 02-09-2015, 08:57 AM

I looked at the Mickey Thompson Street comps and I like the price for them in 275/40 and 305/35. On the MTs site, the overall diameters are listed as 28.4 and 28.6, and it sounds like that would be acceptable tolerance?

But it sounds like the consensus is 285 all around for handling reasons? The Street comp doesn't come in 285 for a 20in wheel. Are there any good recommendations for a tire at that level of pricing and performance? I'd like to stay around 800-850 for all 4 if possible.

Norm Peterson · 02-09-2015, 09:01 AM

Quote:

Originally Posted by NoleLife

If it's doable (won't make my TCS or EST go ape-nuts) then I would be okay with mixing front/rear tire brands or types.

I would NOT do this. Different tires behave just a little differently from each other, and it would be entirely possible to end up with a car that becomes more tail-happy than what you're comfortable with. Better front tires paired with inexpensive rear tires is more apt to give you this result.

Important enough to be worth its own separate post.

Norm

ST1LE · 02-09-2015, 09:10 AM

Quote:

Originally Posted by LOBBS

This combo is quite common as the overall heights are nearly identical. A squared setup is naturally more neutral but a staggered setup can handle just as well as with proper parts selection. There are countless cars on the road running a staggered setup that would be more than qualified to be called great handling.

Good point, thanks!

Norm Peterson · 02-09-2015, 09:13 AM

Quote:

Originally Posted by NoleLife

I looked at the Mickey Thompson Street comps and I like the price for them in 275/40 and 305/35. On the MTs site, the overall diameters are listed as 28.4 and 28.6, and it sounds like that would be acceptable tolerance?

That's certainly within tolerance (and well within the possible difference between brand new and 3/4 worn tires in the same mfr/model/size). Chances are hardly anybody will ever notice the rear tires being less than 1/4" shorter than the front tires.

Quote:

But it sounds like the consensus is 285 all around for handling reasons? The Street comp doesn't come in 285 for a 20in wheel. Are there any good recommendations for a tire at that level of pricing and performance? I'd like to stay around 800-850 for all 4 if possible.

I understand your specific situation, but it makes me a bit uneasy when people appear to be placing too much emphasis on price when it comes to tires.

I'd even consider 295/35's all around. Mickey doesn't seem to offer that size either, but others do. Unfortunately it seems to be a pretty pricy size, nothing at Tire Rack under $350/tire.

Norm

ST1LE · 02-09-2015, 09:14 AM

Quote:

Originally Posted by NoleLife

I looked at the Mickey Thompson Street comps and I like the price for them in 275/40 and 305/35. On the MTs site, the overall diameters are listed as 28.4 and 28.6, and it sounds like that would be acceptable tolerance?

But it sounds like the consensus is 285 all around for handling reasons? The Street comp doesn't come in 285 for a 20in wheel. Are there any good recommendations for a tire at that level of pricing and performance? I'd like to stay around 800-850 for all 4 if possible.

No, I don't think there are ANY tires that cheap. The GY Eagle G2 that comes on the 1LE and ZL1 are probably the cheapest 285 out there in this category.

That is a great tire depending on the application and use of the car. They are great for tracking, but not so much for straight line acceleration and are NOT all seasons by any stretch of the word. Awful in cold and can be dangerous in heavy rain.

NoleLife · 02-09-2015, 09:25 AM

Quote:

Originally Posted by ST1LE

No, I don't think there are ANY tires that cheap. The GY Eagle G2 that comes on the 1LE and ZL1 are probably the cheapest 285 out there in this category.

That is a great tire depending on the application and use of the car. They are great for tracking, but not so much for straight line acceleration and are NOT all seasons by any stretch of the word. Awful in cold and can be dangerous in heavy rain.

Point taken, though I will say I just priced out on Amazon the MT Street Comp in 275/40R20 and 305/35R20 and the price came out to being 841 w/ Free Shipping (see attachment). The bottom tire is the 305, which has the Mfct. part number in the title (see http://www.mickeythompsontires.com/s...tem=StreetComp for part number reference).

These tires look like a really good deal?

02-09-2015, 07:48 AM	#1
NoleLife Drives: 2013 2SS M6 Join Date: Oct 2012 Location: Tallahassee, Fl Posts: 205	Need tire diameter matching help I'm getting new wheels (10in/11in wide for the front and rear respectively). The common setup seems to be 275/40 315/35 However, I don't really need a 315 in the rear (I don't race my car) and would like to avoid dropping 800+ on just the rear tires when buying wheels at the same time. What are some other sizing options for the front and rear? I've tried the (Width) * (Ratio/100), and trying to find 2 numbers within a 1/4in of each other but for common ratios (30,35,40, and 45) there only seems to be the above matching set option. So does anyone know a setup that would be a bit less aggressive, possibly with a 285 or 295 on the rear (if that's not too much of a stretch for an 11in wheel). If it's doable (won't make my TCS or EST go ape-nuts) then I would be okay with mixing front/rear tire brands or types.

02-09-2015, 07:55 AM	#2
sbubbaklein Drives: early 2011 Camaro convertible Join Date: Jul 2014 Location: House Springs, Mo Posts: 2,002 View My Garage	there is a sticky "recommended tire size for 2010 Camaro". It lists a whole lot of tire sizes and their overall dimensions, check it out __________________ Early 2011 LT Convertible, ZL1 bumper, hood, side skirts, belly pan and wheels, Truecarbon ECF hood extractor, K&N CAI, Elite catch can, Big Worm Bow Tie emblems, Jacfab bracket, Vitesse TC, BMR strut brace, BMR tunnel brace, NPP exhaust

02-09-2015, 07:55 AM	#3
ST1LE Drives: E92 BMW M3 Join Date: Oct 2012 Location: Houston Posts: 4,496	The 1LE and ZL1 come with the same 10in/11in setup as you mention above. The 1LE comes with 285/35's on all 4 corners. Even though it fits and performs well, it does have a stretched appearance that is not so easy on the eyes IMHO. The ZL1 comes with 285/35 up front and 305/35 in the rear. I would look for something in that range. You can also get the new Mickey Thompson Street Comp in 275 and 305, and they are extremely well priced. I would not say that 275/40 and 315/35 are common, I would be a little shocked if they were just do to the poor functional affects it creates. I guess people like fat rubber in the rear, even if it hurts overall performance. __________________ SOLD - 2013 1LE - Pat G Spec'd Cam, NPP with 1 7/8" Long Tube Headers with High Flow Cats, Intake w/scoop, Ported Throttle Body, and Apex 1.25" Lowering Springs. J-Rod Built and Matt@FSP Tuned

02-09-2015, 07:58 AM	#4
ST1LE Drives: E92 BMW M3 Join Date: Oct 2012 Location: Houston Posts: 4,496	The 1LE and ZL1 come with the same 10in/11in setup as you mention above. The 1LE comes with 285/35's on all 4 corners. Even though it fits and performs well, it does have a stretched appearance that is not so easy on the eyes IMHO. The ZL1 comes with 285/35 up front and 305/35 in the rear. I would look for something in that range. You can also get the new Mickey Thompson Street Comp in 275 and 305, and they are extremely well priced. I would not say that 275/40 and 315/35 are common, I would be a little shocked if they were just do to the poor functional affects it creates. I guess people like fat rubber in the rear, even if it hurts overall performance. __________________ SOLD - 2013 1LE - Pat G Spec'd Cam, NPP with 1 7/8" Long Tube Headers with High Flow Cats, Intake w/scoop, Ported Throttle Body, and Apex 1.25" Lowering Springs. J-Rod Built and Matt@FSP Tuned

02-09-2015, 08:30 AM	#7
Burt Cone Killer Drives: 2012 SS Join Date: Dec 2013 Location: St. Albans, West Virginia Posts: 832	If you get on Tire Racks website, or most of the tire manufacturers sites, and look up the tire you want, in the size you want, they'll give you the outside diameter in inches. For example: Attached Images __________________ 2012 Camaro SS - Sold Selling off my remaining wheels, tires, 27mm front sway bar, and MGW shift knob. Get them out of my house before my wife puts me out!

02-09-2015, 08:23 AM	#6
NoleLife Drives: 2013 2SS M6 Join Date: Oct 2012 Location: Tallahassee, Fl Posts: 205	A 285/35 and 305/35 combo wouldn't mess up the electronics due to different heights sizes?

02-09-2015, 08:52 AM	#8
Norm Peterson corner barstool sitter Drives: 08 Mustang GT, 19 WRX Join Date: Jul 2012 Location: Eastern Time Zone Posts: 6,990	No matter how you run the numbers, the staggered matching size for 275/40 ends up being 315/35 (the shortcut is 275 * 40 ÷ 35 = 314.3). Aside from that, the two best options have already been mentioned. For ABS concerns, he 1LE's square tire sizing is probably just a little better suited to your SS than the ZL1's slight stagger, although the ZL1's tire sizes are (just barely) within a generally accepted 3% guideline. The ZL1 itself has almost certainly accounted for this in its ABS programming. Still technically acceptable would be 275/40's all around - that size is actually OK'ed out to 11" wide rims. But if the 1LE's mildly stretched rear tire appearance bothers you at all, you wouldn't like this option at all unless it was your only choice under urgent circumstances. FWIW, here's what 285/35's look like on 11" wide rims, photo angle chosen to exaggerate the stretch (you don't see it quite this clearly on the car). Michelin Pilot Super Sports with a mfr-claimed tread width of 10.2". They're 18's, but that doesn't affect the sidewall height or its shape. Norm Attached Images

02-09-2015, 08:57 AM	#9
NoleLife Drives: 2013 2SS M6 Join Date: Oct 2012 Location: Tallahassee, Fl Posts: 205	I looked at the Mickey Thompson Street comps and I like the price for them in 275/40 and 305/35. On the MTs site, the overall diameters are listed as 28.4 and 28.6, and it sounds like that would be acceptable tolerance? But it sounds like the consensus is 285 all around for handling reasons? The Street comp doesn't come in 285 for a 20in wheel. Are there any good recommendations for a tire at that level of pricing and performance? I'd like to stay around 800-850 for all 4 if possible.