stock wheels - how much do they weigh?

is it honestly worth replacing them if I were to get like a 225 40 18 tire on the stock wheels? Other than the look, is it worth it?
 
is it honestly worth replacing them if I were to get like a 225 40 18 tire on the stock wheels? Other than the look, is it worth it?


I replaced mine with wider (7.5") 18's that weight 19.5 lbs each. The difference is definitely noticeable.
 
My RX-8 wheels are 21# Average street drivers won't gain any benefit from the lighter wheel. 225/40s should fix the stock wheel fine -- they're less than 1/2 inch wider.
 
can you tell me what rims you used? post a link or something?

How noticeable? like worth the money noticeable?

The wheel/tire package I'm using is 7 pounds lighter at each corner. Less unsprung weight means more grip over rough roads, better ride, better acceleration and braking.

There's a lot of cheap wheels out there in the ~20 lb range. Here's where I got mine... they're still on sale for dirt cheap:

http://www.edgeracing.com/2007/Mazda/MAZDASPEED3/wheels/18/
 
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