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#4724869 - 04/12/18 03:50 PM wheel offsets
tigrpal Offline

Registered: 11/27/06
Posts: 217
Loc: Illinois
My OE wheels are 15 X 6 et46. I am looking at a new set of wheels for winter tires but the closest sizes I can get are 15 x 6 et38 or 15 x 6.5 et40. I know the wheel manufacturers say these wheels will fit but what affect will the difference offsets have? From it shows that the scrub radius goes from zero to positive. Will the different scrub radius cause the tires to wear differently? Will it affect the suspension or steering at all? Could it affect mpg? Or Is it such a little difference it won't really change anything?

Any help is appreciated.

#4724903 - 04/12/18 04:37 PM Re: wheel offsets [Re: tigrpal]
zorobabel Offline

Registered: 01/27/11
Posts: 507
Loc: Anaheim, CA
It could affect wheel bearing life.
1997 Maxima 180k, Delvac 15w40, Wix 51315
2004 Corolla 190k, VWB 5w20 + SSS 10w40, MGL4967

#4724910 - 04/12/18 04:49 PM Re: wheel offsets [Re: tigrpal]
Bottom_Feeder Offline

Registered: 12/07/08
Posts: 3036
Loc: Occupied Virginia
For what car? Getting some OE take-offs from Craigslist is always a possibility.

#4724913 - 04/12/18 04:50 PM Re: wheel offsets [Re: tigrpal]
Rolla07 Offline

Registered: 11/05/11
Posts: 4755
Very minimal difference between 38 & 40. I doubt you would notice a difference.
2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

#4724952 - 04/12/18 05:45 PM Re: wheel offsets [Re: tigrpal]
IndyIan Offline

Registered: 09/23/08
Posts: 9117
Loc: Ontario, Canada
My winters on the Focus are off by a similar amount, with less positive offset and it is noticeable. Torque steer is amplified a bit in 1st and 2nd gear, and I read it actually softens the effective spring rate significantly which I think I can feel as well. Hwy stability is still excellent though, and tires don't care about offset either for wear. Haven't had any wheel bearing problems yet and don't really expect to, but I also autocross which isn't easy on bearings either.
Also my tires are just set out enough to throw more dirt on the side of the car, but the car does look a bit more planted as the tires are a half inch farther apart.
Get the ET40 though, you might as well minimize the difference.
07 Focus ZXW, 5spd manual, 210km M1 5W30
18 Outback 2.5 CVT 8km FF

#4725015 - 04/12/18 07:05 PM Re: wheel offsets [Re: tigrpal]
Traction Offline

Registered: 06/04/13
Posts: 999
Loc: iowa
Not that I would recommend it on a modern car, but my 1981 Camaro street legal stock car drives great with 15 x 10 inch wheels with a minus 2 inch offset, with a 4 inch wider track drives great.
Tire Industry Association Certified Tire Service Instructor since 2009
13 Tahoe Pursuit
97 C5 Corvette
00 BMW M Roadster
12 Camry
81 Camaro
55 Chevy C4

#4725079 - 04/12/18 08:04 PM Re: wheel offsets [Re: Traction]
tigrpal Offline

Registered: 11/27/06
Posts: 217
Loc: Illinois
Originally Posted By: Traction
Not that I would recommend it on a modern car, but my 1981 Camaro street legal stock car drives great with 15 x 10 inch wheels with a minus 2 inch offset, with a 4 inch wider track drives great.

That's cool. I like the look of the wider sidewalls. I'm sure the ride is excellent. I won't do that on my FWD hybrid though. I'm just trying to fit wheels without messing anything up. I always get good advice here on BITOG and I appreciate it.