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Old 04-28-2003, 10:24 PM   #1
silverF4turbo
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Default Very low offset wheels

What are the major issues that you encounter by going to way lower than stock offsets other than fender rubbing. I'm looking at a wheel thats available in 18x8 with a 35mm offset which is quite a bit lower than I've seen on most GD's. I know the target offset is 48-53 with no rubbing but I've seen people go lower with no rubbing issues and I've also seen people with offsets in that range experience quite a deal of rubbing. One person in particular I've talked to runs 19x8 with a 42 mm offset and has no problems whatsoever and about an inch of clearance to the extent that another 7 mm shouldn't make much of a difference(although I don't have the details on the tire size and 42 is still a considerable amount more than 35).

So is 35mm with correctly plus sized (same overall diameter as stock) tires doable? Would there likely be rubbing, and if so would rubbing be the only concern or would handling also be an issue (like bumpsteer etc.)? This would be for a street car that would see track action maybe one day out of the year so it has to be drivable. Also right now I'm lowering with springs (Tein S tech 2" front .7" rear), would I be less likely to rub than if I had coilovers with a greater drop? I'd like to have the room to move to coilovers later at some point. If there is rubbing can it be entirely corrected with fender rolling?

Sorry for all the questions but I have to decide by mid May... I did a search but couldn't find more of an answer than "don't go lower than 48 because thats what everyone else says" but no real reasons offered. If anyone has had any experience with a wheel similar offset/size I'd really appreciate any feedback

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Old 04-28-2003, 11:21 PM   #2
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i just got some new rims 18x8 racing hart c2 evo in 38mm offset.i need to get new lugnuts before i put them on.i will let u know how it goes when i get those lugnuts.i'm running a 225/40/18 tire also.
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Old 04-28-2003, 11:23 PM   #3
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From the sticky TireRack wheel info post in this forum

Quote:
Offset:


The offset of a wheel is the distance from its hub mounting surface to the centerline of the wheel. The offset can be one of three types.

Zero Offset
The hub mounting surface is even with the centerline of the wheel.

Positive
The hub mounting surface is toward the front or wheel side of the wheel. Positive offset wheels are generally found on front wheel drive cars and newer rear drive cars.

Negative
The hub mounting surface is toward the back or brake side of the wheels centerline. "Deep dish" wheels are typically a negative offset.

If the offset of the wheel is not correct for the car, the handling can be adversely affected. When the width of the wheel changes, the offset also changes numerically. If the offset were to stay the same while you added width, the additional width would be split evenly between the inside and outside. For most cars, this won't work correctly. We have test fitted thousands of different vehicles for proper fitment. Our extensive database allows our sales staff to offer you the perfect fit for your vehicle.
I also think that improper offset can put added wear on certain components of your car
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Old 04-29-2003, 11:41 AM   #4
maciek
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You might experience some handling differences, as well as added stress to the wheel bearings...(most likely void the warranty on them).

Also, when the wheel is so far out of the fender well, you will rub the fender on top of the tire everytime you bottom out...if you don't lower the car, you might only experience this w/ a full load.
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Old 04-29-2003, 05:56 PM   #5
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What offset do you guys consider "too low"?
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Old 04-29-2003, 11:04 PM   #6
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Just have a set of enkei with 38+ offset put on last week... Beside having the wheels stick out a little tiny bit; I really don't see any thing wrong with the set up. I went from 205/50/16 to 225/45/17, and the tires that may be one of the reason the wheels seems sticking out a little more. Haven't do any hard cornering 'cause still waiting for the tires to break in but normal driving with the 38+ wheels seems fine at this point. Of course, I am running stock height and I am pretty sure some kind of rubbing would occur if I lower the ride too much (2+inchs) under aggressive driving. That being said, I am pretty happy with the wheels and yeah, sometimes you just don't find the rims you like in the right offset. Late.
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Old 04-29-2003, 11:05 PM   #7
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bump up!

Thanks everyone for all the help

Nvrenuf nice choice let me know how that works out

The wheel I'm looking at also comes in a more suby friendly offset but it is one of those wheels that just plain looks better with a smaller offset (recessed mounting surface, spokes are more angled) plus the other is a bit narrower


For anyone interested using an offset calculator I came up with these figures:

Inboard increase
w/ 225/40 -- .238
w/ 215/40 -- .433
Outboard increase
w/ 225/40 -- 1.261
w/ 215/40 -- 1.456
Effect on tire track
w/ 225/40 -- 1.81
w/ 215/40 -- 1.41
Amount tire sticks past rim
w/ stock -- .785
w/ 225/40 -- .43
w/ 215/40 -- .23

Converted to mm and not considering tire size:
The clearance from strut housing to the inside of the wheel will be 6mm LESS
The outside edge of the wheel will EXTEND an extra 32mm



Anyone else have any thoughts on this? Thanks

Last edited by silverF4turbo; 04-29-2003 at 11:11 PM.
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Old 05-01-2003, 01:32 AM   #8
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One last bump... I'm really having trouble deciding between 18x8 et35 and 18x7.5 et50.
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Old 03-27-2005, 10:32 AM   #9
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I bolted on one of my friends 18x7.5 et38 wheels with 225/40 tires on my car the other day just to see how it looked... I didn't drive it at all though, the wheel didn't stick out past the bubbled out fender on the front of my rs and it didn't look like it would cause any problems... it looked nice too since it really widened out the stance in front too... but I don't have any experience driving on it so there may be some rubbing issues... I'm not really sure... I also want to get some et35's 17x8... I've seen lots of guys that track their sti's running wheels with this offset so I don't think it could hurt handling too adversely... I may be wrong though...
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Old 03-27-2005, 01:08 PM   #10
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Quote:
Originally Posted by silverF4turbo
One last bump... I'm really having trouble deciding between 18x8 et35 and 18x7.5 et50.

The 18x7.5 +50 is the correct size....the other one is NOT.

Your bearings may fail quickly with the +35's on and it is NOT cheap or easy to replace them......and you WILL get rubbing on the +35's and have to roll your fenders.
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Old 03-27-2005, 01:52 PM   #11
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Well since that post was two years ago, whatever was going to happen has long since happened.
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Old 03-27-2005, 02:55 PM   #12
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Quote:
Originally Posted by Mulder
Well since that post was two years ago, whatever was going to happen has long since happened.


..... thanks Mulder....needed that one------
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Old 03-27-2005, 05:43 PM   #13
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whoops, my bad for bumping an old thread... I really need to start checkign dates more
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Old 04-22-2005, 08:29 PM   #14
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I'd be interested in an update
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Old 04-24-2005, 04:06 AM   #15
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I got 18x7.5 +50mm which I've ran for the last 2 years without problems on 225-40-18. Advan Kreuzer Series V only come in the 2 above sizes which would work out for Subarus.



I picked the less aggressive offset of the 2, although purley imo it would look alot nicer if it came out another 5-10mm or so, more flush with the fenders... Also certain wheels just plain look cooler in lower offsets as the spokes will be more curvaceous or have a thicker lip. I made the decision that was right for me at the time though. Now I have no problems with fender rolling since I'll probably be using a 245 tire next. Also I just installed stoptechs and it clears the caliper but the fit is tight... under the recommended 2mm so I'll probably have to look into spacers. Anything thicker like brembos I'm sure wouldn't fit

If I had to buy again it would probably be a tough choice again since I have seen people running wheel and offset sizes that 2 years ago people would have never thought possible.... but the +50 offset's been great to me. If I had an unlimited budget I'd buy swap for 05 STI lug pattern and have a much wider selection of wheel sizes

Last edited by silverF4turbo; 04-24-2005 at 04:14 AM.
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