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Old 01-19-2009, 05:11 PM   #1
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what are the tire diameters

what is the height and width of the 20'' inch rims
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Old 01-19-2009, 05:14 PM   #2
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I think the width for the 20's are 245's in the front and 275 in the back. For height do you mean ground clearance? If so I think it is 5". Sorry if that is not what you mean but I am pretty much retarded right now since I am about to pass out from hunger lol .


EDIT - ok I just am copying and pasting this from the CAMARO WIKI for 20" rims:

20 x 8" / aluminum (front)
20 x 9" / aluminum (rear)
Tires: P245/45ZR20 summer (front)
P275/40ZR20 summer (rear)

Last edited by kanys; 01-19-2009 at 05:16 PM. Reason: added details...
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Old 01-19-2009, 05:15 PM   #3
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They're 20" high and 8" wide on the front and 9" on the rear.
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Old 01-19-2009, 07:24 PM   #4
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According to a generic tire calculator:
fronts = 28.68" high & 9.65" wide
rears = 28.66" high & 10.83" wide
IHTHs
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Old 01-20-2009, 02:57 PM   #5
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still not large enough on the rear look too narrow.... i would like to see 11"1/2 and 12 inch wide--rear--... not shure if it would fit in the wheelwells....
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Old 01-20-2009, 03:06 PM   #6
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Quote:
Originally Posted by Hurst equipped View Post
still not large enough on the rear look too narrow.... i would like to see 11"1/2 and 12 inch wide--rear--... not shure if it would fit in the wheelwells....
Have you seen it in person? Only reason I say is because I thought the same till I went out to a show and saw it. They looked really wide to me after that.



EDIT: On a side note....can someone explain to me how they get 9" out of 275mm? I know it's right...I just don't know how that works with tires.:(

Reason I ask is because every conversion I've done comes back saying 275mm = 10.8 inches
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Old 01-20-2009, 03:18 PM   #7
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Quote:
Originally Posted by Dragoneye View Post
Have you seen it in person? Only reason I say is because I thought the same till I went out to a show and saw it. They looked really wide to me after that.



EDIT: On a side note....can someone explain to me how they get 9" out of 275mm? I know it's right...I just don't know how that works with tires.:(

Reason I ask is because every conversion I've done comes back saying 275mm = 10.8 inches
TAG, just found this on another site:

265 is 10.4 inches wide
275 is 10.8 inches wide
285 is 11.2 inches wide
295 is 11.6 inches wide
305 is 12.0 inches wide
315 is 12.4 inches wide
325 is 12.8 inches wide

And for how they got that:
1 millimeter = 0.0393700787 inch so
275 millimeters = 10.8267717 inches.
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Old 01-20-2009, 06:05 PM   #8
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no ..dragoneye,i still haven't seen the car in person yet. maybe it's the height that fools me. since on my ws6 i have 275 40 17 ; i know by today's standard it's a small wheel diameter ,but i like the wideness of them. and i know the camaro comes with 275 too--back only- but the tire is a lot taller at 20inch. so from all the pics we see it doesn't get into my head that at 1st sight the tires are wide in the back... wonder how much g's it will pull ...do someone has an idea? .88 .90 higher or lower??? hope it will eat the curves..and oh.... did someone noticed the rear rollers on the ls7 camaro showcar at sema those wheels were gorgeous and wide at the back.. or the wheel giving me that impression..
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Old 01-20-2009, 06:09 PM   #9
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Quote:
Originally Posted by Hurst equipped View Post
no ..dragoneye,i still haven't seen the car in person yet. maybe it's the height that fools me. since on my ws6 i have 275 40 17 ; i know by today's standard it's a small wheel diameter ,but i like the wideness of them. and i know the camaro comes with 275 too--back only- but the tire is a lot taller at 20inch. so from all the pics we see it doesn't get into my head that at 1st sight the tires are wide in the back... wonder how much g's it will pull ...do someone has an idea? .88 .90 higher or lower??? hope it will eat the curves..and oh.... did someone noticed the rear rollers on the ls7 camaro showcar at sema those wheels were gorgeous and wide at the back.. or the wheel giving me that impression..
There was a post here where someone said they read it would pull .95 or .96. I will try to dig it up. I don't know the original source though.

EDIT: Look here - http://www.camaro5.com/forums/showthread.php?t=11929
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Old 02-09-2009, 03:15 PM   #10
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Thanks i'll go &check it out.
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Old 02-09-2009, 03:43 PM   #11
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This is the look I want. Name:  camaro-wallpaper14.jpg
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Old 02-09-2009, 04:33 PM   #12
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Quote:
Originally Posted by Dragoneye View Post
EDIT: On a side note....can someone explain to me how they get 9" out of 275mm? I know it's right...I just don't know how that works with tires.:(

Reason I ask is because every conversion I've done comes back saying 275mm = 10.8 inches
9" is the wheel width only. 275mm refers specifically the tire's width whose contact patch is wider than the wheel's width. The contact patch of tires are generally a bit wider then the wheels their mounted on.

After seeing the car in person the tires do have a good amount of meat on them, but me not wanting my car to blend in with the rest of the crowd will either have my stock rears widened to 11" or buy aftermarket ones so I can fit 315/35/20's which are about 12.5 inches wide but the same height as the stock tires. Looking to get some Nitto INVO's.
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Old 02-09-2009, 09:33 PM   #13
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Originally Posted by blackZbandit View Post
9" is the wheel width only. 275mm refers specifically the tire's width whose contact patch is wider than the wheel's width. The contact patch of tires are generally a bit wider then the wheels their mounted on.

After seeing the car in person the tires do have a good amount of meat on them, but me not wanting my car to blend in with the rest of the crowd will either have my stock rears widened to 11" or buy aftermarket ones so I can fit 315/35/20's which are about 12.5 inches wide but the same height as the stock tires. Looking to get some Nitto INVO's.
Is getting the stock wheel widened safe for track use?

I don't really know, but it sounds like buying aftermarket, or ZO6 wheels might be a better option if the buyer is serious about going around corners..

Even though the ZO6 wheels are staggered (I think 19" in the front, which might not fit the Brembos even though they fit the ZO6 brakes and 20" in the back) they might look weird.

Something about cutting a wheel in half, adding metal and then welding it sounds not quite as strong and not as light as a wheel made at 10-11"
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Old 02-13-2009, 06:05 PM   #14
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Old 02-13-2009, 06:09 PM   #15
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Aye don't put vette wheels on it that's just. Bad taste IMO*.

It's too early for that kinda of sillyness can't disrespect the car. It has to stand on it's own. Leave that to broke rednecks like me whole will vulture up this car when they get 100,000 long ones on the road.
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Old 03-25-2009, 10:04 AM   #16
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Quote:
Originally Posted by jordan 572 View Post
what is the height and width of the 20'' inch rims
You need to clarify and be more specific. Your post title says tire diameter, but in the body of your post you're asking about the rim size. Which do you want? Also, do you want the nominal size of the rim or the actual size?
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Old 03-25-2009, 04:27 PM   #17
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will 305's (tires) fit on these stock wheels?
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Old 03-25-2009, 06:19 PM   #18
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Interesting facts ...

The largest meats a 2002 Z28 could be had with were 275/40ZR17 ... these had a 25.66" o/a diameter and a 4.33" section height (rubber between wheel & road).

All the 2010 Camaros are rolling on 28.610~28.668" o/a diameter tires ..................... and ....................... would you believe ........................ the 20" wheels end up with the ....................... EXACT SAME 4.33" section height.

Basically, the diameter of the 2010 is 3" larger than the old Camaro. I think this is getting close to TRUCK TIRE DIMEMETER.

Cool thing about this in my eyes, is I can have 19" wheels with very similar section height to that of my 2004 Mustang (225/55-16 = 4.872 section height / 25.744 o/a dia.). Why do I think this is cool ?? My car is a daily driver and section height is needed for pot holes etc. ... I figured with all these new cars going to larger wheels there was no way around loosing section height. Well at least ways with the Camaro, that is not going to be the case !!

And those of you that really like the almost zero section height / rubber band tire look, you can probably put 24" wheels on your ride without screwing up the o/a rolling diameter.


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Old 03-26-2009, 12:02 AM   #19
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will 305's (tires) fit on these stock wheels?
Not a chance in hell if you plan to turn at all.

I have the 2002 SS wheels with a width of 9" which is the same as the SS and the 275mm is what came on the wheel from the factory.

A 285 MIGHT fit, but you start to have a tire that will flex left and right as you turn, creating a very unstable contact patch.

The 2002 Trans Am WS6 wheels were 9.5" so they were a little bit wider, but for a 305mm, you will probably want something that is between 10.5 and 11" wide.

The big question is, how wide is the wheel well on the body of the car and I have a feeling it wont accept much more than a 295mm without some major work or a Big Fu***** Hammer!

EDIT: One more thing to note is the skinny size of the front tire @ 245mm, which is quite small. With most of the weight being up front, a 275mm is probably better suited to corner carving, but once again, I don't think there will be much extra room without major work.
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Old 03-26-2009, 06:36 PM   #20
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Not a chance in hell if you plan to turn at all.

I have the 2002 SS wheels with a width of 9" which is the same as the SS and the 275mm is what came on the wheel from the factory.

A 285 MIGHT fit, but you start to have a tire that will flex left and right as you turn, creating a very unstable contact patch.

The 2002 Trans Am WS6 wheels were 9.5" so they were a little bit wider, but for a 305mm, you will probably want something that is between 10.5 and 11" wide.

The big question is, how wide is the wheel well on the body of the car and I have a feeling it wont accept much more than a 295mm without some major work or a Big Fu***** Hammer!

EDIT: One more thing to note is the skinny size of the front tire @ 245mm, which is quite small. With most of the weight being up front, a 275mm is probably better suited to corner carving, but once again, I don't think there will be much extra room without major work.

lol Im just not to familar with these sizes in person, so your saying a 285 is prob the widest you can go with the stock 9" wheels??
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Old 03-27-2009, 02:06 PM   #21
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Here's a quick formula to convert mm to inch; just devide by 25.4, 275/25.4= 10.826
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Old 03-27-2009, 02:56 PM   #22
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Quote:
Originally Posted by SAUCE View Post
lol Im just not to familar with these sizes in person, so your saying a 285 is prob the widest you can go with the stock 9" wheels??
I agree.

I've seen some OVERLY wide tires on some cars on wheels not meant for that width of tire and it looks rediculous. and unsafe.
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Old 03-27-2009, 03:31 PM   #23
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Quote:
Originally Posted by camaropete View Post
TAG, just found this on another site:

265 is 10.4 inches wide
275 is 10.8 inches wide
285 is 11.2 inches wide
295 is 11.6 inches wide
305 is 12.0 inches wide
315 is 12.4 inches wide
325 is 12.8 inches wide

And for how they got that:
1 millimeter = 0.0393700787 inch so
275 millimeters = 10.8267717 inches.
275 is tire width not wheel width.
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Old 03-27-2009, 03:32 PM   #24
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Quote:
Originally Posted by Hurst equipped View Post
...did someone noticed the rear rollers on the ls7 camaro showcar at sema those wheels were gorgeous and wide at the back.. or the wheel giving me that impression..
the LS7 concept had 295s on the rear & had a custom set of wheels with a different offset to make them fit

Quote:
Originally Posted by gunslinger View Post
Is getting the stock wheel widened safe for track use?

I don't really know, but it sounds like buying aftermarket, or ZO6 wheels might be a better option if the buyer is serious about going around corners..

Even though the ZO6 wheels are staggered (I think 19" in the front, which might not fit the Brembos even though they fit the ZO6 brakes and 20" in the back) they might look weird.

Something about cutting a wheel in half, adding metal and then welding it sounds not quite as strong and not as light as a wheel made at 10-11"
the Z06 wheels are 18"/19", and they won't fit. the fronts barely clear the calipers with 13" rotors. the camaro brakes are 14.4 up front

Quote:
Originally Posted by SAUCE View Post
will 305's (tires) fit on these stock wheels?
no. well... they might fit on the wheels (doubtful and not advisable), but they won't fit on the car. they had to change offsets to fit 295s on the LS7 concept

Quote:
Originally Posted by gunslinger View Post
Not a chance in hell if you plan to turn at all.

I have the 2002 SS wheels with a width of 9" which is the same as the SS and the 275mm is what came on the wheel from the factory.

A 285 MIGHT fit, but you start to have a tire that will flex left and right as you turn, creating a very unstable contact patch.

The 2002 Trans Am WS6 wheels were 9.5" so they were a little bit wider, but for a 305mm, you will probably want something that is between 10.5 and 11" wide.

The big question is, how wide is the wheel well on the body of the car and I have a feeling it wont accept much more than a 295mm without some major work or a Big Fu***** Hammer!

EDIT: One more thing to note is the skinny size of the front tire @ 245mm, which is quite small. With most of the weight being up front, a 275mm is probably better suited to corner carving, but once again, I don't think there will be much extra room without major work.
i doubt he wanted to put 305s up front, so turning ain't an issue. we know you could fit 295s using wheels with a different offset to move the tire further out. as for the front, i'd imagine 255 or 265 is the widest you can go on stock rollers.

Quote:
Originally Posted by The Boat View Post
275 is tire width not wheel width.
to be more specific... it's section width.
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