Where's the FAQ's? Noob questions

[outback_97]

I have a few simple questions and I haven't been able to find the answers in any of the following places (I may have overlooked them):

The Tirerack info
Ravensblade info
Impreza Wheel chart
North Ursalia's info
The FAQ's (finally found this... in Suspension and Steering... Wheels and Tires split off from this one?)

1) What is the stock weight of wheel *and* tire for WRX 16" stock rims? I've only found wheel weights, don't tire weights matter too?

2) Same question (weight of wheel and tire), but re: stock 15" steel for '02/'03 TS?

3) Are there any differences between the stock lug nuts for the two wheels above? Just finish (chrome) or any further differences... i.e. will my stock lugnuts on my TS work correctly w/ WRX wheels?

4) Did anyone ever figure out the reason for the change between two different offsets (55mm and 53mm) on stock WRX wheels?

The above places I looked for this info are all VERY helpful, no complaints. Maybe we could create a FAQ specifically for Wheels and Tires, since there seem to be so many repeat questions. Mine probably are repeat questions, but I really did try to find the answers before posting. Thanks.

Steve