What does the offset of the wheel refer to and what is the offset of the standard 15" BBS?
I want to get some wheels for my track car but would like to have them a little further out than the standard BBS's to give my 4pot calipers some room to breath!
Wheel offset?
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Ant
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^ should assist ya duderino.
Look for ET15 or so to increase room without rubbing the arches, stock BBS are ET24 iirc
HTH
^ should assist ya duderino.
Look for ET15 or so to increase room without rubbing the arches, stock BBS are ET24 iirc
HTH
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ImysE30
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The lower the ET, the more the wheel will stick out (closer to the arch).rix313 wrote:Hi Ant,
Thanks for that. Wouldn't making it ET15 bring it closer to the caliper though?
Higher ET will result in the wheel being more closer to the strut.
Current Fleet:
E30 335i Turbo M3 Convertible Replica
E30 335i Turbo M3 Convertible Replica
If you want more space for the brakes would it not be better to use a wheel with a larger ET with a spacer? This would keep the rim and tyre in the same position but give more room inside the wheel where you want it for larger brakes. This kind of shows it:
It also depends on the shape/design of the wheel. I have recently been in discussion with Keri at WMS to see if their 280mm brake kit will fit under my Mim1900's (15x7 ET13), but due to the shape of the back of the spokes they wouldn't quite fit. The kit will however fit under a standard 15" BBS with an ET of 24.
It also depends on the shape/design of the wheel. I have recently been in discussion with Keri at WMS to see if their 280mm brake kit will fit under my Mim1900's (15x7 ET13), but due to the shape of the back of the spokes they wouldn't quite fit. The kit will however fit under a standard 15" BBS with an ET of 24.
clarko74
Remember mates, offset is relative to wheel width so be careful when blanket stating that E30s like one certain ET... they can range a lot.
Rix313, what sort of wheel studs do you have? That is odd that spacers will not fit... There are some good ones they sell over here in America, very popular = http://www.vorshlag.com/product_info.ph ... cts_id=389
Remember when using spacers, try to get ones that are hubcentric so they don't shake!
Rix313, what sort of wheel studs do you have? That is odd that spacers will not fit... There are some good ones they sell over here in America, very popular = http://www.vorshlag.com/product_info.ph ... cts_id=389
Remember when using spacers, try to get ones that are hubcentric so they don't shake!
Offset (ET dimension) is the distance from mounting face to centre line of the wheel and is not related to the width of the wheel.craz_azn wrote:Remember mates, offset is relative to wheel width so be careful when blanket stating that E30s like one certain ET... they can range a lot.
The backspace dimension (inner edge to mounting face) is related to width assuming ET is the same.
the tyre size calculator in the wiki
http://www.e30zone.net/e30zonewiki/inde ... calculator
will give you all the info you need if you feed in the original siize it overlays the new
http://www.e30zone.net/e30zonewiki/inde ... calculator
will give you all the info you need if you feed in the original siize it overlays the new
That is really useful, just what I've been looking for.DaveD wrote:the tyre size calculator in the wiki
http://www.e30zone.net/e30zonewiki/inde ... calculator
will give you all the info you need if you feed in the original siize it overlays the new
clarko74