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Old 02-06-2001, 01:28 PM   #1
EricB
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Post Disadvantage of 48mm offset vs. 53mm?

I understand what the different offset numbers mean. Subaru uses 53mm, while I've seen some people say don't use anything less than 50mm, and others say 48mm is ok.

Besides the risk of having the tires rub the fenders, is there any other downside to using a 48mm offset? Is there any change in handling since each tire is moved 5mm farther out from the center of the car?

Eric
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Old 02-06-2001, 03:52 PM   #2
ColinL
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Besides the risk of the tire hitting the fender lip, the only issue is increased load on the wheelbearing. This is easy to imagine, just think of the decreased offset being like a lever arm. Calculate where the center of the tire's width lies vs. where it did originally and you know how much more force is going to be exerted on the wheelbearing. 5mm is pretty minor, IMO.

Now say you were running really short tires on a 35mm offset and a stiff suspension. They don't rub so there's no problem, right? Do the calcs again and now see what is happening to your wheelbearing...
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Old 02-06-2001, 04:53 PM   #3
Michael
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+48 mm offset is not too bad.
should not have too much problem since most of the impreza that i see in the japanese magazines runs from +48 mm offset to a +53mm offset. but most of them use a +48mm
hope this help
michael
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Old 02-06-2001, 07:36 PM   #4
nqwan
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i dunno much bout this stuff but isnt the +48mm offset for 17x7.5 inch rims?
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Old 02-07-2001, 12:20 AM   #5
Andrew
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My rims are +48. 17x7.5. You'll rub if you lower it alot. I have it lowered to the point where it doesn't rub and it's still pretty low.
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Old 02-07-2001, 09:31 AM   #6
Billy
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Should a drop of less than an inch with a 215/45/17 on 17x7 rims be a safe bet to be rub-free?

My worry is (I've heard though not personally seen) that not all tires of the same stats are identical, some may be slightly wider or narrower than others.
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Old 02-08-2001, 12:46 AM   #7
Julian
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The same stated size can vary by 1/2" to 3/4". Each manufacturer has a website...if you're running a close-to-bad offset, you might want to check the actual tire width via the websites before buying a particular brand. If you're running a "good" offset, shouldn't matter if you keep the width sane.

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Old 02-08-2001, 01:42 PM   #8
goose
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Why don't you ask Imprezer, I'm pretty sure he's got a pair of Advan TCs (48mm) on his car, and it looks pretty low to the ground-

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