Rotor drum wear

2009 CHRYSLER TOWN AND COUNTRY
166,000 MILES
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BERN50
  • MEMBER
  • 1 POST
Are these numbers good 0.512 in and 0.478? Where I should I not have to change the rotors?
Nov 21, 2018 at 6:15 AM
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JONNYB1963
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 263 POSTS
Hello,

Thank you for visiting 2CarPros!

According to the manufacturer specifications the minimum rotor thickness for the front brake rotors is 1.040" and for the rear it is .409" See the chart attached.

Generally you replace rotors for two reasons. One is that they are worn out below the minimum thickness. Two is if they are warped and cause your brake pedal to pulsate meaning that they are warped (they have "runout"). If both thickness and runout are good, then there is no need to replace them.

Regards,
Jon
Mar 15, 2021 at 12:27 PM
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