Wheel track
 

Quick question, is the track the same front and rear on Sierra based roadster?

Just checked it out with a tape measure, I got 1660 mm front and back between outsides of bottoms of tyres. The actual width of tyre ~210 mm, ET42. I have about 2 degrees neg camber front and 0.5-0.75 degrees in the back. So, with zero camber the front would be 1-2 cm narrower.

Cheers Albert

I guess it depends on what width wheels you use though? Standard rear track on a Sierra (according to this http://www.carinf.com/en/507048002.html) is 1468.00 mm...