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View Full Version : Break in new rim brake pads method?

SoCalSteve
10-04-2018, 07:58 PM
Hi all,

Is there a method to breaking in new rim pads? Or, am I overthinking this?

The reason I ask is because the 2nd generation ENVE rims create a very loud squeal - whistling sound. Braking works well, but not a pleasant sound. ENVE just sent me their older version of brake pads ( as they claim they are not as noisy ) and I was just thinking that maybe there is a way to mitigate the noise by breaking them in a certain way.

Or, am I overthinking this?

As always, thank you all in advance,

Steve
Louis
10-04-2018, 08:09 PM
The usual solution for squealing caliper brakes is to toe in the pads just a bit.
SoCalSteve
10-04-2018, 08:19 PM
The usual solution for squealing caliper brakes is to toe in the pads just a bit.

Tried it, still squealing.
Tony
10-04-2018, 08:24 PM
I don't think so, not with rim brakes. I clean the pad and rim with alcohol to remove any oily substance on them, install and ride.
Cicli
10-04-2018, 08:25 PM
What kind of brakes?
Toe in is BS as it makes the brakes spongy.
Louis
10-04-2018, 08:25 PM
This might help:

https://www.sheldonbrown.com/brandt/brake-squeal.html
SoCalSteve
10-04-2018, 08:32 PM
What kind of brakes?
Toe in is BS as it makes the brakes spongy.

Dura Ace 9100
AngryScientist
10-04-2018, 08:33 PM
i thought i heard some annoying cyclist as i was trying to enjoy lunch this afternoon.

view look familiar Steve? :)

https://instagram.fhhr1-1.fna.fbcdn.net/vp/4ec0212750b8f486a609ccbac9bd57df/5C6099C2/t51.2885-15/e35/42663183_342162286355783_815333536720755646_n.jpg
Louis
10-04-2018, 08:35 PM
Toe in is BS as it makes the brakes spongy.

It's worked for me a number of times, and has no discernible impact on "sponginess" (most likely because the amount of lever travel required to get the pad from first contact to || to the rim is very small)
SoCalSteve
10-04-2018, 08:41 PM
i thought i heard some annoying cyclist as i was trying to enjoy lunch this afternoon.

view look familiar Steve? :)

https://instagram.fhhr1-1.fna.fbcdn.net/vp/4ec0212750b8f486a609ccbac9bd57df/5C6099C2/t51.2885-15/e35/42663183_342162286355783_815333536720755646_n.jpg

Wait, is that Tony P’s? You in my hood?
AngryScientist
10-04-2018, 08:45 PM
Wait, is that Tony P’s? You in my hood?

Si Senor!

Can I see your condo from my balcony??

https://instagram.fhhr1-1.fna.fbcdn.net/vp/f6217fbe18a218cbd0012e3a03b347e4/5C4C8DA0/t51.2885-15/e35/43023156_447137305692242_2916676847184574618_n.jpg
SoCalSteve
10-04-2018, 09:27 PM
Si Senor!

Can I see your condo from my balcony??

https://instagram.fhhr1-1.fna.fbcdn.net/vp/f6217fbe18a218cbd0012e3a03b347e4/5C4C8DA0/t51.2885-15/e35/43023156_447137305692242_2916676847184574618_n.jpg

Quite a fisheye lens you got there!

And yes, if you look to the farthest building in the upper left hand ( just past the Ritz ), that’s our building. If I remember correctly, when we met it was so foggy that you couldn’t see it at all. Today was an absolutely gorgeous day! Stunning, in fact!!! Could see all the way to the tip of Malibu and the entire Santa Monica Bay from my balcony.

In your picture, if you look to the upper right hand corner, you can see the ocean and the Palos Verdes Peninsula. Nick, you brought great weather this time!!! Thanks!
oldpotatoe
10-05-2018, 06:47 AM
Tried it, still squealing.

Try roughing them up with a rasp or course toothed file.
redir
10-05-2018, 07:43 AM
I have a piece of MDF, very flat particle board basically, with some 80 grit sand paper glued to it. Every once in a while I will true up the brake pads on it. But it's more for the shape rather then the squeal. I remember having to toe in old school brakes by bending the arms a bit but I never had to do that on any of my new bikes. Cyclocroos bikes definitely need toe in. But you might consider giving it a try. It most certainly does work on canti brakes.
Hindmost
10-05-2018, 10:12 AM
Try roughing them up with a rasp or course toothed file.

The rims? (Some sort of emoticon indicating humor.)

Toe-in is a very real solution in many situations. Sanding/roughing the pads helps if the pads are "glazed" or hardened. Cleaning rims and pads is important if any sort of sticky stuff has appeared.
shortwaveradio
10-05-2018, 11:28 AM
What's the fit like for the pads? I know that if they aren't tight, the pads can vibrate inside the pad carriers on certain wheels. Shimming with tape on the back of the pad can help if that's the case.
parallelfish
10-05-2018, 12:29 PM
I had the same issue with my 3.4s with the original brake track. Adjusting toe did not resolve the issue. And as mentioned previously, the pads were a loose fit in the holders.

Taking a fine file to the pads solved the issue for me. I now touch up the pad surfaces each time I wash my bikes - it rejuvenates the braking effectiveness.
false_Aest
10-05-2018, 09:54 PM
Steve,

Take some of Irwin's Pomade or moustache wax and put a dab on each brake.

.... and a dab behind your ear for good luck.

;)
oldpotatoe
10-06-2018, 06:18 AM
Steve,

Take some of Irwin's Pomade or moustache wax and put a dab on each brake.

.... and a dab behind your ear for good luck.

;)

Or Dapper Dan:)

https://www.youtube.com/watch?v=4hni4OIJXG4