Rotor drum wear

Tiny
BERN50
  • MEMBER
  • 2009 CHRYSLER TOWN AND COUNTRY
  • 166,000 MILES
Are these numbers good 0.512 in and 0.478? Where I should I not have to change the rotors?
Wednesday, November 21st, 2018 AT 6:15 AM

1 Reply

Tiny
JONNYB1963
  • MECHANIC
  • 252 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
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Monday, March 15th, 2021 AT 12:27 PM

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