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Discussion Starter · #1 ·
Just wanted a confirmation on if this will work and will it not rub. I live in the New england area and I plan on having these tires for spring/summer/fall. I currently have the stock M3 which I believe are 17in with 6.5 width and a 52.5 offset and P205/50/17 tires. I am still not sure what size tire I want to get. The look I want is something that will look more filling then what I have now without dropping my car.

I read Tireracks info http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=46&currentpage=33on what tire sizes number means so and the following posts so I have somewhat an Idea of what works and what doesn't. I still don't completely understand what offset means. Borrowed from Marksink offset calculator, all I know is that "The point to keep in mind when selecting a wheel offset is to make sure your strut housing-to-wheel clearance is not significantly reduced, or the insides of your tires will rub suspension pieces, or not fit at all." So reading this, does that mean that I need a smaller offset from the stock 52.5 or a larger one?

My options are a
18" x 7.5" 225/40/18
17" x 7.0" 225/45/17

I was thinking of a 45 offset for the 17 and 18. From looking at the FAQ: Stock wheel/tire info & Aftermarket wheel essentials http://www.mazda3forums.com/index.php?topic=25387.msg343238#msg343238

I live in pothole heaven and often drive my friends around so I have a full load. Friends aren't exactly skinny either.

References
http://marksink.com/tire_wheel_offset/offset.html
http://www.mazda3forums.com/index.php?topic=25387.msg343238#msg343238
http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=46&currentpage=33
http://www.mazda3forums.com/index.php?topic=9014.msg114612#msg114612

Thanks again.
 

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if your primary objective is to fill the wheel-well in a little, than going with a 17" x 7.0" 225/45/17 will not do much considering that it is same overall diameter as the stock 205/50/17. although it will look alittle better since its wider.

you can get a taller tire to fill your wheel-well but it will throw you spedo off

Have you looked into the RacingBeat Springs?, they only drop .5'' around and are like20% stiffer

i suggest the springs with 225/45/17 or 225/50/17 (these will fit the stock rmi size, so you wont have to worry about the whole offset thing)
 

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Discussion Starter · #4 ·
[quote author=ViperDom link=topic=74799.msg1340162#msg1340162 date=1176743185]
if your primary objective is to fill the wheel-well in a little, than going with a 17" x 7.0" 225/45/17 will not do much considering that it is same overall diameter as the stock 205/50/17. although it will look alittle better since its wider.

you can get a taller tire to fill your wheel-well but it will throw you spedo off

Have you looked into the RacingBeat Springs?, they only drop .5'' around and are like20% stiffer

i suggest the springs with 225/45/17 or 225/50/17 (these will fit the stock rmi size, so you wont have to worry about the whole offset thing)
[/quote]

No, I haven't. What are the pros and cons of putting in a suspension?
 

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[quote author=PhoeniX Skye link=topic=74799.msg1340805#msg1340805 date=1176752520]
Pros = Handling, Sexiness

Cons = Minor lost in ride quality (with some springs)
[/quote]

This is correct,
There are 3 diff cadigorys for you:
a. conservitive .5'' drop Racingbeat

b. moderate 1.0-1.5'' drop EibachProkit / Progresive
c. slamed 1.5-2.0'' drop Tien / EibachSportline
 

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For your situation:
'I live in pothole heaven and often drive my friends around so I have a full load. Friends aren't exactly skinny either.'

I suggest a. (the 1/2inch drop), since you ride with a full load and encounter potholes daily

b. is do-able but your passangers will prob complain about the ride, and
c. def not for u
 

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I would recommend starting with the 225/45-17. If you live in "pothole heaven", 18's aren't for you. 225//45-17 is ever so slightly larger than stock, but more importantly, wider and will look more aggressive and fill the wheel wells more. 45 mm offset is good, and will allow you to loewr the car later if you wish. Then, if you feel like you need more, you can drop the car, but I'd do wheels and tires first, and see how you like that, since it doesn't present any compromise like lowering the car would.
 

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if you get the 17x7, get a 215/45/17...not a 225/45
 

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a 45 mm offset with a 17x7, he should be fine with a 225, and if he's trying to "fill the wheelwells" more, the last thing he will want is a smaller overall diameter that a 215/45 will give him

I happen to agree with you that 215/45 is ideal for a 7" wide wheel, but 225 will work
 

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[quote author=the415 link=topic=74799.msg1342982#msg1342982 date=1176813905]
if you get the 17x7, get a 215/45/17...not a 225/45
[/quote]

Re-read the OP:
He wants to fill the wheel well, not take away from it
a 225/45or50 will do this, not a 215/45(smaller overall diameter)
 

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yeah it's bigass nasty looking tire.
 

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in your situation, i would get the racingbeat springs...and stay with a 17" wheel/tire as that will give you most sidewall for comfort and potholes.

if you go 18, you'll have to get lower profile tires to keep the same diameter and your ride will feel even more jarring and possibly damage your wheels easier.

get some 17" wheels with 225/45/17 with the mild drop of the RB springs, i don't think you should have problem.s
 
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