New Caprice - Discussion forums

does anyone know the absolute widest tire I can throw on the rear with stock wheels without rubbing? any input would be greatly appreciated!

Sorry for this somewhat non-answer...the widest tire that you can fit back there is a lot wider than the widest tire that you can put on an 8" rim (which as far as I've seen a tire shop mount according to "their policy" is a 255).
But perhaps S13REMI's thread on how he put 10" wide Corvette wheels with 305/30 on his PPV will help, or at least inform: http://www.newcaprice.com/forum/viewtopic.php?t=1055

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1987 Landau (383 stroker, vortec heads, 700r4, Bilstein shocks, Eibach springs, Bassett 15x8, BFGoodrich 275/60, 9C1 speedo)
2011 9C3 (K&N CAI, Weldcraft widened 18x9 factory steelies, Bridgestone 285/35)

The wheel width would be the limiting factor first. Could probably squeeze a 275 on there. the sidewall will look a bit bubbled out since the wheel is only 8" wide, assuming you are refering to the rear

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2012 CAPRICE 460WHP! NIGHT FURY CAM, LONG TUBES, OTR INTAKE, NEW ERA TUNE, COILOVERS, C6 Z06 WHEELS. (BIGGEST EVER ON A CAPRICE)