Whats a safe thickness for Rotors???
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From: So Cal
W213 '17 E43 ///AMG - W211, W208 no more
Whats a safe thickness for Rotors???
Ok, I know the recommended minimum rotor thickness is stamped on the rotor itself, but, thats just MB wanting to make tons more money & covering their ASSets in case a thinner rating causes immediate danger to the driver/passengers
So, for instance...
W203 C320 new rotor is 28mm thick, and minimum safe thickness is 25.4mm
W203 C32 new rotor is 30mm thick, and minimum safe thickness is 28.0mm
I'm sure the pattern goes the same across other models... So the question is, how long do you guys run with your rotors before you swap them out for new ones?
With these factory rated minimums, you pretty much need to change the rotors EACH & EVERY TIME you change the pads...
So, for instance...
W203 C320 new rotor is 28mm thick, and minimum safe thickness is 25.4mm
W203 C32 new rotor is 30mm thick, and minimum safe thickness is 28.0mm
I'm sure the pattern goes the same across other models... So the question is, how long do you guys run with your rotors before you swap them out for new ones?
With these factory rated minimums, you pretty much need to change the rotors EACH & EVERY TIME you change the pads...
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From: So Cal
W213 '17 E43 ///AMG - W211, W208 no more
haha... well, my intentions is not to wait until it starts cracking... just want to know when everyone else decided to ignore MB recommendations and change it OUTSIDE of every brake pad change... ie., what mileage or after how many pad changes?
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From: The Heights, CA
Tesla Model S
Originally Posted by mmgrad
haha... well, my intentions is not to wait until it starts cracking... just want to know when everyone else decided to ignore MB recommendations and change it OUTSIDE of every brake pad change... ie., what mileage or after how many pad changes?
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CLK 320
Originally Posted by mmgrad
haha... well, my intentions is not to wait until it starts cracking... just want to know when everyone else decided to ignore MB recommendations and change it OUTSIDE of every brake pad change... ie., what mileage or after how many pad changes?
And that's before the sensor trips... WTF?
I never follow their recommendations anymore... I go by mileage and feel. By now I know the car well enough to know when it's time for things to get done...
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From: So Cal
W213 '17 E43 ///AMG - W211, W208 no more
Originally Posted by viguera
I never follow their recommendations anymore... I go by mileage and feel. By now I know the car well enough to know when it's time for things to get done...
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From: WOT somewhere in the Bay Area
1951 Caterpiller D6
Originally Posted by mmgrad
haha... well, my intentions is not to wait until it starts cracking... just want to know when everyone else decided to ignore MB recommendations and change it OUTSIDE of every brake pad change... ie., what mileage or after how many pad changes?
I don't think it matters how hard you drive. My mother-in-law drives very conservatively and although her front pads in her CLK lasted well over 50K, the rotors still had to be replaced. My CLK only got 30K before pads and rotors were needed up front.
On the other hand, how many of us went into the shop with a dial caliper to see the thickness for ourselves? Maybe it is a conspiracy to get us to spend more money on repairs.
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well, when i did my front brake job, i replaced the rotors with brembo ones. Im almost due for pads again, and the brembos barely have any visible lip like the oe ones did, so i dont think they wore much at all. Maybe they are not as soft? I definately dont plan on changing them when pads are due because of this.
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From: WOT somewhere in the Bay Area
1951 Caterpiller D6
Originally Posted by x15jq
well, when i did my front brake job, i replaced the rotors with brembo ones. Im almost due for pads again, and the brembos barely have any visible lip like the oe ones did, so i dont think they wore much at all. Maybe they are not as soft? I definately dont plan on changing them when pads are due because of this.
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From: Treasure Coast
2018 Mclaren 720s, 2021 Aston Martin DBX
If you don't have calipers to measure them, the old rule of thumb for changing out rotors is the lip showing wear about the thickness of a dime.
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From: So Cal
W213 '17 E43 ///AMG - W211, W208 no more
so, in other words, ya'll follow the minimum spec stamped on the rotors... once you hit that threshold, you just change it?
but seriously, from new to replace, 2mm isn't very much at all... is 30mm THAT much safe than 28mm?
many people shave their rotors... how is it any different for a MB?
Maybe its time to invest in some zimmerman or brembo rotors, which 'may' have a little more longevity...
but seriously, from new to replace, 2mm isn't very much at all... is 30mm THAT much safe than 28mm?
many people shave their rotors... how is it any different for a MB?
Maybe its time to invest in some zimmerman or brembo rotors, which 'may' have a little more longevity...
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From: WOT somewhere in the Bay Area
1951 Caterpiller D6
Originally Posted by mmgrad
so, in other words, ya'll follow the minimum spec stamped on the rotors... once you hit that threshold, you just change it?
but seriously, from new to replace, 2mm isn't very much at all... is 30mm THAT much safe than 28mm?
many people shave their rotors... how is it any different for a MB?
Maybe its time to invest in some zimmerman or brembo rotors, which 'may' have a little more longevity...
but seriously, from new to replace, 2mm isn't very much at all... is 30mm THAT much safe than 28mm?
many people shave their rotors... how is it any different for a MB?
Maybe its time to invest in some zimmerman or brembo rotors, which 'may' have a little more longevity...
I agree that 3mm isn't very much tolerance but I'm too chicken to find out exactly how thin we can push the rotors before they overheat and break apart! US cars and trucks have much thicker rotors and wider operating range. They are designed to be cut with each pad change. MB rotors don't have the extra "meat"!
I'm curious too about aftermarket rotors. Good luck,
Greg
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From: So Cal
W213 '17 E43 ///AMG - W211, W208 no more
Hey Josh... Need you & all the folks with high mileage CLKs to chime in...
Since you guys have obviously gone through several pad changes... how frequently do you change the rotors?
Since you guys have obviously gone through several pad changes... how frequently do you change the rotors?
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From: NY/CT
CLK 320
Originally Posted by mmgrad
Hey Josh... Need you & all the folks with high mileage CLKs to chime in...
Since you guys have obviously gone through several pad changes... how frequently do you change the rotors?
Since you guys have obviously gone through several pad changes... how frequently do you change the rotors?
But I do a ton of city driving, so it's stop & go all the time.
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From: So Cal
W213 '17 E43 ///AMG - W211, W208 no more
Originally Posted by viguera
I'm in an 02 with 90k. Third set of front pads, second set of rears. The fronts will have to go in a few weeks though, I can tell...
But I do a ton of city driving, so it's stop & go all the time.
But I do a ton of city driving, so it's stop & go all the time.
have you noticed any signs of fade under heavy breaking?
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From: NY/CT
CLK 320
Originally Posted by mmgrad
so you are still on your first set of rotors? thats impressive...
have you noticed any signs of fade under heavy breaking?
have you noticed any signs of fade under heavy breaking?
So they're basically lasting me around 25-30k... and when they're changed, you can tell that they're due...
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From: The OC
CLK 430; Porsche 993
I have an '01 with 77K and just replaced my front rotors for the second time (and pads for the third). The last time I had pads changed, the dealer actually let me slide on the front rotors.
