Excessive Rear Pad Wear

garoto

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I changed pads all around at 25K miles. I found that the rears wearing together with the fronts was odd, I have never seen rear pads wear so quickly. Well, now 10k later at 35k miles, the rear pads are down to 3mm end now I’m concerned. No track days on this CTR.

How’s everyone’s brake wear on the rear?

I’m opening a case with Honda if the dealership refuses to figure out the issue. This seems like an odd level of wear to me.

Round 2 with the dealer on Monday. We just discovered that there might be an issue today.
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kefi

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The Type R has a feature called agile handling assist which activates the rear brakes to help you corner at high speed. I went through two sets of rear pads and one set of front pads in 25k miles with nothing but sporty street driving.
 
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garoto

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The Type R has a feature called agile handling assist which activates the rear brakes to help you corner at high speed. I went through two sets of rear pads and one set of front pads in 25k miles with nothing but sporty street driving.
I don’t think the rear brakes are involved in this. Certainly shouldnt contribute to rear pad excessive wear.

From the manual:
“Lightly brakes the front wheels, as needed, when you turn the steering wheel, and helps support the vehicle’s stability and performance during cornering.”
 

kefi

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Oh, right. It’s the front wheels. My B.

The rear pads are smaller though so less material to go through.
 

Pitt-Civ

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In older cars, if you start burning thru rear brakes, it's a sign that there is something wrong with the front part of the system. If say a passenger rear went faster than the drivers, check the drivers front for issues. Now that was cars in the 90s or so, the systems now seem to work better, and more evenly than before. I've never seen rear go faster, or even close to, how quickly fronts go, but if Honda doesn't say it's a normal thing for their system I'd be curious if the system needs rebled.
 


davemarco

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My rear pads are also much lower than my fronts. Fronts still look good, but the rears only have about 40% left. I assumed it was due to Honda's variant of torque vectoring braking the inside rear wheel, but I can't find any writeup that confirms that.
 

Nickthewaffler

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Air in front brakes lead to more rear wear. Front brakes heat up more. Bleed system completely if you have not. I believe the R has individual lines and the air may be able to get trapped in certain lines. Just a guess more than anything, but Ive had a similar issue and this helped.
 

MadMage

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I'm pretty sure @kefi 's first statement was correct. It's one reason to turn VSA fully off if you track. The car will activate the rear brakes during spirited turns.

But, that said, unless you have changed how you drive since your first pad replacement, then you should get consistent wear.
 
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garoto

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I'm pretty sure @kefi 's first statement was correct. It's one reason to turn VSA fully off if you track. The car will activate the rear brakes during spirited turns.

But, that said, unless you have changed how you drive since your first pad replacement, then you should get consistent wear.
We confirmed that that statement was not correct. The users manual says as much.
 

MadMage

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We confirmed that that statement was not correct. The users manual says as much.
You're quote was pretty short to know the context. Care to point me to the page number? Thanks!
 


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garoto

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You're quote was pretty short to know the context. Care to point me to the page number? Thanks!
Regarding how Agile Handling Assist works. In the manual, it says that it applies brake pressure to the front wheels only.
 

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I can tell you that after 2 days at an HPDRE event, my rear pads were worn significantly and the rotors were glazed. The fronts were almost unaffected. I wrote it off to the fact I forgot to turn off VSA. Regardless of what the manual says, I’m almost certain the rear brakes are involved.
 
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garoto

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I can tell you that after 2 days at an HPDRE event, my rear pads were worn significantly and the rotors were glazed. The fronts were almost unaffected. I wrote it off to the fact I forgot to turn off VSA. Regardless of what the manual says, I’m almost certain the rear brakes are involved.
Interesting. That seems to be my situation, but, without tracking the car.
 


 


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