SteveC68

What is the backspacing of the stock wheels on a 2006 Z51?

RicK T

+56mm = front
+79mm = rear

haljensen

Usually stated in millimeters of OFFSET, not backspace.

As stated above offset is 56mm F. and 79mm R.

http://www.1010tires.com/WheelOffsetCalculator.asp

SteveC68

Backspacing and offset are different. Offset is the distance from the middle of the rim to the face of the hub. Backspacing is the distance from the face of the hub to the back edge of the rim. Offset can be positive or negative while backspacing is always positive.

dbratten

Backspacing on the OEM wheels is F = 6.95" and R = 8.61". This is using a standard assumed rim thickness of .5".

A F backspacing of 8" will fit but rub at full lock. A R backspacing of 9.5" will fit on a base coupe.

--Dan

HOXXOH

In addition to all the other information, the C6 wheel size is identical on all 2005-2013's regardless of style or options, including Z51 or F55.

Only Z06, GS, and ZR1 have different size wheels.