Compared to the AP1 wheels + OE tires, will the following actually have less unsprung weight and improve acceleration?

OZ Ultras + Pilots

Front: 18x8 + 225/40 = (18.4 lbs + 21 lbs) = 39.4 lbs
Rear: 18x9 + 245/35 = (19.6 lbs + 22 lbs ) = 41.6 lbs

AP1 Stock + OE Tires

Front: 17.5 lbs + 24 lbs = 41.5 lbs
Rear: 18.6 lbs + 26 lbs = 44.6 lbs


I want these wheels in black and they would look great on SPA yellow. Also if I lower the car with 48mm and 55mm, will they rub?

 

Tough call. While they do weigh less, the weight is distributed further out since they're bigger wheels...

 

The tires themselves are 3-4lbs lighter alone so that should offset any negatives by running the bigger wheels. I would run them, enjoy them, and you should see an increase in performance. Any time you get rid of weight its a bonus, anytime its unsprung weight its a double bonus.


Have fun!!!!

 

I have these wheels with BF Goodrich KDW-2's (225 front, 255 rear). It might be a mental thing but I think my car is a tad bit slower with the wheels and tires.

They don't rub at stock height but they look like they may rub a little (b/c I have 255) when I drop my car. If you get 245's, you should be fine.