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The BMW Range
5 Series
E39
Bore out the wheel center
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<blockquote data-quote="hofmeister" data-source="post: 484547" data-attributes="member: 19669"><p>Inset or outset</p><p>This is very important. Ignore this and you can end up with all manner of nasty problems. This is the distance in mm between the centre line of the wheel rim, and the line through the fixing face. You can have inset, outset or neither. This determines how the suspension and self-centring steering behave. The most obvious problem that will occur if you get it wrong is that the steering will either become so heavy that you can't turn the car, or so light that you need to spend all your time keeping the bugger in a straight line. More mundane problems through ignoring this measurement can range from wheels that foul parts of the bodywork or suspension, to high-speed judder in the steering because the suspension setup can't handle that particular type of wheel. This figure will be stamped on the wheel somewhere as an ET figure.</p><p>Inset and outset are subsets of offset and the relationship is this : positive offset = inset. Negative offset = outset. Typically you can get away with 5mm-7mm difference from the vehicle manufacturer specification before you'll run into trouble with the wheels fouling the suspension or bodywork. So for example if your stock wheels have an offset of 42mm and you can only find replacements with a 40mm offset, that 2mm difference ought to OK.</p><p></p><p>Read more: <a href="http://www.carbibles.com/tyre_bible_pg4.html#ixzz1BuYrJALL" target="_blank">http://www.carbibles.com/tyre_bible_pg4.html#ixzz1BuYrJALL</a></p></blockquote><p></p>
[QUOTE="hofmeister, post: 484547, member: 19669"] Inset or outset This is very important. Ignore this and you can end up with all manner of nasty problems. This is the distance in mm between the centre line of the wheel rim, and the line through the fixing face. You can have inset, outset or neither. This determines how the suspension and self-centring steering behave. The most obvious problem that will occur if you get it wrong is that the steering will either become so heavy that you can't turn the car, or so light that you need to spend all your time keeping the bugger in a straight line. More mundane problems through ignoring this measurement can range from wheels that foul parts of the bodywork or suspension, to high-speed judder in the steering because the suspension setup can't handle that particular type of wheel. This figure will be stamped on the wheel somewhere as an ET figure. Inset and outset are subsets of offset and the relationship is this : positive offset = inset. Negative offset = outset. Typically you can get away with 5mm-7mm difference from the vehicle manufacturer specification before you'll run into trouble with the wheels fouling the suspension or bodywork. So for example if your stock wheels have an offset of 42mm and you can only find replacements with a 40mm offset, that 2mm difference ought to OK. Read more: [url]http://www.carbibles.com/tyre_bible_pg4.html#ixzz1BuYrJALL[/url] [/QUOTE]
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The BMW Range
5 Series
E39
Bore out the wheel center
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