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How do i measure if I have 312 MM rotors or 288 MM rotors in front?

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Old 05-06-2007, 01:08 PM
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How do i measure if I have 312 MM rotors or 288 MM rotors in front?
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Old 05-06-2007, 01:25 PM
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Default Take the wheel off...get a measuring tape out...use an inch to mm calculator..
<a href="http://www.simetric.co.uk/feet_to_metres.php">Online Calc</a>
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Old 05-06-2007, 01:37 PM
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onlineconversion.com is a lil easier to use...
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Old 05-06-2007, 02:44 PM
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Default You need one of these : special tool available from dealers
<ul><li><a href="http://en.wikipedia.org/wiki/Ruler">http://en.wikipedia.org/wiki/Ruler</a</li></ul>
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Old 05-06-2007, 03:40 PM
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312mm only 2.7 and 4.2 or am i wrong?
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Old 05-06-2007, 05:08 PM
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2nd. Use it all the time.
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Old 05-06-2007, 05:14 PM
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Default According to the model guide on the resource link, an '04 3.0 has 288mm Fronts>
but I've found a few discrepancies on some other models' specs listed on those.

I have an '02 3.0 Avant, and I have 312mm Front rotors, but the sedan may be only 288mm.

Best bet is to measure it.
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Old 05-06-2007, 05:16 PM
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321 x 30mm on 2.7T &amp; 4.2 My 3.0 Avant has 312 x 25mm.
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Old 05-06-2007, 07:01 PM
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Do i have to measure diameter of the rotor?
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Old 05-07-2007, 06:54 AM
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Default I think the Avants get bigger brakes to compensate for the extra load capacity..
My 00 has 312 rotors in the front as well.
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