Tire Size Help
Thread Starter
Safety Car
Joined: Feb 2006
Posts: 4,541
Likes: 385
From: Fort Worth Texas
Tire Size Help
I am going to mount some chrome C6 Z06 spyder wheels on my 2002 Z06. They are 8.5X18 and 10X19. I am going with Continental DW 265/35/18 and 305/30/19. Does this combination sound correct? Thanks for any help.
Drifting
Joined: Nov 2016
Posts: 1,660
Likes: 365
From: SF Bay Area
Just under 1" difference in diameter, you should be fine from the traction control/active handling standpoint. Diameters are essentially identical to Z06 stock, so your speedometer wouldn't be off either.
Drifting
Joined: Nov 2016
Posts: 1,660
Likes: 365
From: SF Bay Area
http://www.tyresizecalculator.com/ty...dth-calculator
This might help. The widest for an 8.5" rim is 255, and 285 for a 10" rim. 9" minimum, ideally 9.5-10" for 265, and 11" minimum for 305, ideally 11.5-12".
This might help. The widest for an 8.5" rim is 255, and 285 for a 10" rim. 9" minimum, ideally 9.5-10" for 265, and 11" minimum for 305, ideally 11.5-12".
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Melting Slicks
Joined: Feb 2001
Posts: 2,804
Likes: 358
From: Northville, MI
The dimensions of the wheels by the you have listed are for the stock C6 not the Z06, with those wheels I believe the offset of the rear tires is not friendly with the C5.
Size Offset Application
18" × 8.5" +56 88-96 frt/rear, 97-13 frt exc. C6 Z06, ZR1, Grand Sport, C7 frt exc. Z51
19" x 10" +79 05-13, C7 exc. Z51 rear
18" x 9.5" +57 97-04 rear, 05-13 frt
Size Offset Application
18" × 8.5" +56 88-96 frt/rear, 97-13 frt exc. C6 Z06, ZR1, Grand Sport, C7 frt exc. Z51
19" x 10" +79 05-13, C7 exc. Z51 rear
18" x 9.5" +57 97-04 rear, 05-13 frt
Last edited by Gordy M; Apr 25, 2017 at 08:40 AM. Reason: sizes
Instructor
Joined: Oct 2010
Posts: 247
Likes: 44
From: Vancouver Island British Columbia, Canada
C6 OEM GM Z51 Split Spoke Rims & Tires
Rear tire sizes are 285-30-19
Front tire sizes are 245-35-18
These wheels should be the same specs as the ones that the O.P. was asking about shouldn't they? Didn't mean to jack the thread but the info should be relevant. Can anyone explain would these not be C5 friendly as I don't know what the back spacing on the C5 Z06 is.
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
Those rim widths are for the base C6, not the Z06, as Gordy M pointed out.
Base C6 tire sizes were 245/40x18 up front and 285/35x19 at the rear. Seems to me likely that the GM engineers knew what they were doing when they picked that combination - and because they were stock sizes, there's a lot of choice.
Base C6 tire sizes were 245/40x18 up front and 285/35x19 at the rear. Seems to me likely that the GM engineers knew what they were doing when they picked that combination - and because they were stock sizes, there's a lot of choice.
Instructor
Joined: Oct 2010
Posts: 247
Likes: 44
From: Vancouver Island British Columbia, Canada
Those rim widths are for the base C6, not the Z06, as Gordy M pointed out.
Base C6 tire sizes were 245/40x18 up front and 285/35x19 at the rear. Seems to me likely that the GM engineers knew what they were doing when they picked that combination - and because they were stock sizes, there's a lot of choice.
Base C6 tire sizes were 245/40x18 up front and 285/35x19 at the rear. Seems to me likely that the GM engineers knew what they were doing when they picked that combination - and because they were stock sizes, there's a lot of choice.
Looks like I still need to do some more searches. Thank you both.
Last edited by Brackets; Apr 26, 2017 at 08:10 PM.