Quote:
Originally Posted by Suberman
I'm not sure where you are getting your wheel/tire weights but the stock tire is very light, 21lbs, about 3 lbs lighter than any performance tire I've seen. The stock rims are a nice and sturdy but chunky 20lbs each. To give you an idea of how hard it is to better these weights I bought O Z Alleggeritta rims at 15lbs each (one of the lightest rims available for reasonable money) but fit Michelin Pilot Sport A/S 3 tires at a hefty 24lbs each, saving only 1 lb per corner. Low rolling resistance tires are light, but the sidewalls are like wet spaghetti. You lean on those Primacies and they hold on fine until they give up, then you end up sideways pretty suddenly and counter steering very quickly. My snow tires , 225/45x17 Pirelli Sottozeros, are nice and progressive when they finally let go and the car is transformed into a delightful machine, easy to catch and easy to corner. That shouldn't be.
This car is very sensitive to tire choice. Fit big wheels and wide tires and prepare to be disappointed.
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Forgestar F14 17X8.5 - 16.2lb (per digital scale, pic posted on Forgestar facebook page)
Michelin Pilot Super Sport 245/40/17 - 23.1lb (per Michelin site)
Stock = 42lb
My setup = 39.3lb
So my estimate of 3-4 was overstated, it's closer to 2.7.
I didn't quote your info about grip as it's more or less stuff I already know. (Being a cyclist, I'm used to very tiny contact patches.)