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Old 08-26-2016, 09:35 AM   #3
KillboyPowerhead

 
Drives: 2015 Z/22
Join Date: Aug 2015
Location: Ontario, Canada
Posts: 988
Can't say from personal experience but from the many hours of research I've done: 305 can fit in the rear without any modifications as this is the stock size for the ZL1 (+43 mm offset); 315 can fit but regardless of the wheel offsets/suspension mods there is potential for rub (when there is a lot of weight in the back/trunk and you hit a big bump/hole); up front 285 can fit without mods as this is the stock size for the 1LE/ZL1 (+23 mm offset); not sure if 295 can fit without sticking out without mods (namely smaller diameter springs); I believe 305 will stick out regardless, hence the fender flares on the Z28.

Feel free to correct me on any of this as I would like to know this info too!
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