wheel offset question

MassiveJim

MassiveJim

MassiveJim

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Joined
22 Feb 2014
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If my car as standard came with any of the below wheel sizes/offsets
would it be possible to fit wheels from a different model (same brand) with a slightly different offset without problems ?
The wheels I am looking at are (I think) 6Jx16 ET50

According to wheel-size.com my car came with the following wheels as options
195/65R15 6Jx15 ET47 5x112 M14 x 1.5 57.1
205/60R15 6.5Jx15 ET50 5x112 M14 x 1.5 57.1
215/55R16 7Jx16 ET45 5x112 M14 x 1.5 57.1
225/45R18 7.5Jx18 ET42 5x112 M14 x 1.5 57.1

so the wheels I am looking to buy are a slightly higher offset but the wheels aren't as wide so should be ok right ?
 
The higher the offset, the more "tuck" the wheels will have (into the arches). So running higher offset wheels can easily be solved with spacers anyway.

Be careful of any center bore or stud pattern differences though. Just because they are from the same "brand" (I assume here you mean like Ford / VW etc...) doesn't mean that they will actually physically fit. But does look like you have all the data there.
 
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right.
car is currently fitted with 15" steel wheels, according to "google" the also came fitted with 16" alloys
7j 16 ET45, tyre size = either 215/55 R16 205/55 R16 depending on which website you look at.

I have bought some 16" Audi alloys from the bay which are
7.5j 16 ET45
the tyres fitted are 225/55 R16

2 of the tyres are ok, and 2 need replacing what tyre size should I replace them with ?
215/55/16 (which are silly expensive
225/55/16, which I tink are the wrong size, and also an odd size because all of the tyres seem to be about 25% more expensive
205/55/16 would the difference between the 2 axles be too much ?
 
225/55/16 is probably what should go on with them being 7.5J compared to the standard 7J (for your model). Anything less than that will be introducing stretch to the tyre. Probably not huge amounts, and possibly barely noticeable, but stretch none the less.

The 225/55/16 tyres will be the correct tyres for those wheels.
 
Put your old sizes and the newer options into a calculator like: http://www.miata.net/garage/tirecalc.html

In fact, http://www.willtheyfit.com/ mentioned above has speedo reads etc. just make sure you're not going to end up with a rolling radius that changes your speedo a large amount. I recall that -+1.7% is about the limit of difference you should run, any larger/smaller is going to give poor speedo accuracy.
 
I was more concerned with wether the tyre would fit on the rim correctly. as the difference on the speedo seems to be negligible according to willtheyfit.com



EDIT
So it appears that if I fit a 225/50/16 the rolling radius will be kept the same as a 205/55/16.
I am assuming that this means the tyre profile is the same size on these tyres then ??
 
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