I have some RE-11s that are pretty old already and sat for a few months last year. They flat spotted a little but they worked out of it just fine. No issues now.
I haven't had any issues on the Z on various tires (Michelin, Bridgestone, Nitto) unless it sits for at least 3-4 months without moving.
__________________

2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed |
|