will these rims be a good fit on my car I have IS 300 rims sitting in my garage powder coated black and never got a chance to actually put them on a car...is the center bore big enough or small enough to fit on the mazda3 or no

 

I don't know that anyone here will be able to answer that question for you.
You will have to know the wheel diameter and width, and especially the bolt circle and number of lugs, offset (quite important) and center hole diameter of the wheels in question.
If the center is too big I wouldn't worry about it too much as when the lug nuts are torqued to spec it's simply not an issue. But you might be able to purchase concentric rings to adapt them to the correct diameter.I would use the plastic ones if available. They're usually a lot cheaper than metal ones too.
If it's too small, you have a problem and would need a machine shop to fix it properly.

Why would you want to use these particular wheels on you 3 anyway? How heavy/light are they?

 

they are pretty light about 25lbs with rubber on them. I want to use them because they'r just sitting in my garage. They are 5 lug and i don't know how big the bore is. 5 x 114.3 bolt pattern, 50 mm pr 55mm offset not sure 7 inch width.

 

Well, that all sounds pretty good! Why not try them on for size?
25lbs w/rubber?? WOW!! That's lightweight!
IIRC, the 3, as most modern Mazda's, have a 67mm (?) bore, but don;t treat that as gospel.

 

sh!it if the bore on the mazda is 67 then i guess these rims will be sitting in my garage for the next car....bore is 60.1mm on the IS 300 rims ...googled it....I REALLY want these rims on the car either the mazda or the altima i have either one...I put a lot of work into these rims they are full black with a gloss to them and they look mean as hell.

 

Yup! I just confirmed my guess. Mazda uses a 67.1mm center bore on it's wheels. Most AM wheels these days use an oversized75mm.

Are you sure about that weight though? My 17" AM wheels weigh in at 13.8 lbs. ea. and the tires, though not the lightest are ~21-22lbs. ea.
By comparison, the OE 17's are 19.6 lbs ea.

 

i will confirm that tomorrow...got to look for the wieghing scale...but how much do the stock rims weigh i have hub caps...

 

You have the 15" steelies. Mine had the 17" alloys. 19.6 lbs. ea. w/o tires.

 

lucky you man i wanted the 17's...wanted the touring model but was out of price range, i want all black rims though and i will prob try to take these rims to a machine shop and see if they can make the bore bigger. I'm going for a rally type look not a luxury chrome rims look if you know what i mean.

 

hmmm see i went with the 15" alloys. they look good and they get the job done. it only costs me like 20 more a month so i mean you get more options and it looks nicer then the ****ty looking hubcaps (well they dont look too too bad but i dont care for them much. currently i got my snow tires so i can feel your pain lol)