Stationary, or moving w/o jolts and bumps, a well built bicycle wheel can take some 300 kg/ 600 lbs. After that, it just depends on how violent the ride is. Above 200 lbs is a good place to take some care with how the bike is built, and how it's being used.
With no rim, aprox 100 lbs.
If you do not have a tire your rims will be damaged and the some with what the wheel. The weight of the car is so heavy it would crush the wheel and the rims.
For a 2006 Mazda Speed6 rim, weight is approximately 22.5 lbs.
No- If you do not have a tire your rims will be damaged and the some with what the wheel. The weight of the car is so heavy it would crush the wheel and the rims.
Depends on what type rims you want to install. New OEM rims will be very expensive and you can install after market rims for allot less.
No, rims are very tough. It takes a very hard hit to crack a rim. Installing a wheel weight will not cause a crack.
Alot .
Money
A cheap set of 20 inch rims would not be that much worse than an expensive set of rims. The quality of the rims and brand would dictate the pricing range of the rims.
Yes, there isnt much rubber on them, so they will shorten the lifespan of the rims.
The price of 24 inch rims for your car depends on where you live. Keep in mind that cheap rims are not of high quality. Cheap rims prices start from 250 dollars.
I don't think you will have enough wheel clearance for 20". I also don't believe the transmission will hold up under the extra weight of the 20". I suggest going with 17" or 18" max.