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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 02-07-2014, 05:00 PM
hondo402000 hondo402000 is offline
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Location: Charlotte, NC
 
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Brake Rotor max and min thickness

Just got my new rotors,
original thickness 0.870
Min thickness per BMW spec, 0.800

so you get 0.035 thickness per side ror wear

you would think they could make then thicker!

no wonder you have to replace rotors every time the pads are gon
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Old 02-07-2014, 05:46 PM
Pilgrim Pilgrim is offline
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There are reasons for their being thin. They are designed to minimize weight. Many German cars take this design approach and recommend changing rotor discs when you change pads.
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Old 02-07-2014, 11:04 PM
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DSXMachina DSXMachina is offline
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Location: New Hampshire
 
Join Date: Dec 2007
Posts: 10,375
Mein Auto: 335i E92 TiAg 6MT ED
Quote:
Originally Posted by hondo402000 View Post
Just got my new rotors,
original thickness 0.870
Min thickness per BMW spec, 0.800

so you get 0.035 thickness per side ror wear

you would think they could make then thicker!

no wonder you have to replace rotors every time the pads are gon
Hondo, not sure whether that is the 'discard' thickness or if it's the minimum 'reinstall' thickness. In other words you could safely reinstall them at .801", there should be enough life left in the rotor to last another set of pads. The actual discard thickness would end up being .750 or whatever.
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Old 02-08-2014, 03:33 AM
hondo402000 hondo402000 is offline
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Location: Charlotte, NC
 
Join Date: Nov 2012
Posts: 1,600
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Quote:
Originally Posted by DSXMachina View Post
Hondo, not sure whether that is the 'discard' thickness or if it's the minimum 'reinstall' thickness. In other words you could safely reinstall them at .801", there should be enough life left in the rotor to last another set of pads. The actual discard thickness would end up being .750 or whatever.
well that makes more since!,
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