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post #1 of 23 (permalink) Old 08-01-2013, 01:55 PM Thread Starter
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Question Spacers & Aftermarket Rims

My Mazda6 has an offset of 55mm and the rims i'm looking at that i'd like to get have an offset of 38mm. I heard that i could get spacers so that rims with a different offset than the car comes stock with will fit.

Will this work? Is there any negative effects of doing this?

Will i need 17mm spacers, like this?

Hubcentric 17mm Wheel Spacers 5x114 3 CB 67mm 12x1 5 Extended Studs | eBay

i'd appreciate any help anyone can give, thanks.
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post #2 of 23 (permalink) Old 08-01-2013, 02:39 PM
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You don't need the exact same offset as OEM specs. I don't really know about 1st gen fitment, but you might be able to fit et +38. If not, a 5 or 10mm spacer would do. It would help if a 1st gen'er could chime in.

I have a 2nd gen with +60 stock. The new wheels I bought are +40 and 2.5in wider, and I have no issues!

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post #3 of 23 (permalink) Old 08-01-2013, 02:51 PM
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Hold on a second
Spacers will only make the +38 offset situation worse
The lower the offset the more poke the wheels have
So if the offset is too low the only option you have to make them work is rolling your fenders!
Spacers are there to push the wheel out more, so they only work with something higher than what you need and the wheels suck in too much!

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post #4 of 23 (permalink) Old 08-01-2013, 03:01 PM
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first, you are clearly missing the basics of what "offset" is. Offset is where the hub mounts with relation to the wheel. in that a 7" wide wheel with a 0 offset with have 3.5" in front and behind the wheel. 0 being the center point of the wheel.

a 7" wide wheel with a +25mm( ~1") offset has 4.5" of backspacing and 2.5" of front spacing

a -25mm offset on a 7" wide wheel will get you 4.5" of front spacing, and 2.5" of rear.

on a 8" Wide wheel 4" on either side of the hub, will give you a 0 offset.

it is a calculation to dictate how much back spacing and front spacing you have so that you can figure out clearance between the suspension and also the fender well.

38mm offset only tells me 1/2 of the story because I don't know how wide is.



this a decent chart for reference. my wheels are far different than "OEM SPEC", but with a little measuring you can fit a whole lot more than the lame wheels mazda puts on our cars.

if you can be more specific with you question, we can be a whole lot more help.... and won't have to ramble nearly as much next time


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post #5 of 23 (permalink) Old 08-02-2013, 10:21 AM Thread Starter
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yeah i'm not really an expert on this. this is just what i heard. spacers fill the "space" between the offset of the car and the offset of the rim, if the offset of the rim is smaller. the rims i'm looking at are an offset of +38 and width is 7". and i know rims with +38 offset don't fit because when i bought the car the guy who had it before me had aftermarket rims with a +38 offset and my back tires were rubbing when i turned or went over a bump and my mechanic said the reason is the rims because the offset was too low so they weren't sitting on there right, they were tilted. so i was wondering if there was a way i could get them to fit right and i thought spacers was the trick.
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post #6 of 23 (permalink) Old 08-02-2013, 12:21 PM
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Offset can only be REDUCED by adding a spacer.

a 38mm + 17mm spacer will give you an effective offset of +21. There is no spacer to make the wheel go Deeper into the wheel well, the spacer moves it OUTWARD, and CLOSER to the fender.

as for a +38 rubbing, you need to ROLL the lip of the Fender and this will no longer happen. The factory fenders have a huge lip to them that isn't rolled from the factory (unlike the fronts which are) and with a simple roll will eliminate all that rubbing issues.


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post #7 of 23 (permalink) Old 08-02-2013, 12:52 PM Thread Starter
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ok so the only way to get the rims to fit would be getting the fender rolled? alright, thanks for your help. is there any possible negative effects of getting that done?
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post #8 of 23 (permalink) Old 08-02-2013, 01:09 PM
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Quote:
Originally Posted by NessaXox View Post
ok so the only way to get the rims to fit would be getting the fender rolled? alright, thanks for your help. is there any possible negative effects of getting that done?
Fender rolling is tricky for new people
You could mess up the paint around the fender line, crack the paint, get a dent (happened to me and a few others) and if the paint cracks badly enough it will cause rust eventually
If you do, do it then make sure you read up on it and know well what you are doing!
Getting a shop to do it is usually quite expensive, so its your choice

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post #9 of 23 (permalink) Old 08-02-2013, 01:16 PM Thread Starter
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yeah if i did go that route, i would deffinitely take it to a shop. i wouldn't attempt it myself. but even with taking it to a shop, i may not wanna chance getting it done if it can possibly cause any other issues.
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post #10 of 23 (permalink) Old 08-02-2013, 01:17 PM
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The biggest thing is the increased possibly of rust

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