Centric Heavy Duty

SkiFreak

Crazy Person
If they are in fact heavy duty shoes, they should be better at dealing with heat and brake fade, meaning you can stop harder for longer.
It basically comes down to trusting an eBay seller over a brake shop.
Just make sure you adjust them properly after fitting them.
 

Aussie Iron

Explorer
Look to me just normal shoes but linings are riveted instead of glued. If linings are of a different composition than normal that may increase brake performance but may wear quicker (say softer linings). Riveted linings can stand more heat as they can't come unglued. They use heat to unglue the old linings when they refurbish them.
May or may not be good only time will tell.

Dan.
 

Ferjablito

Active member
Well, the brand is just an example. The question is whether there are colleagues with updated ceramic brake pads?
 

luthj

Engineer In Residence
I am not super familiar with commercial/truck brake materials. Most pads/shoes for vehicles in the USA use the SAE two letter code system (via SAE J866 spec). The first is the cold friction, the second is the hot friction.

So a DG code pad would have 0.15-0.25 friction at temps between 200-400, and 0.45-0.55 at temps between 300-600F. The higher the friction coefficient, the more stopping force is generated for the same pedal (or actuator) force.

Not all listings show the friction codes (if present), but they can sometimes be seen in the photos of a listing.


1757886477959.png

Here is a random shoe, its hard to see, but one of the lines ends with FF.

1757886925348.png

There are other factors to consider. In extreme duty bonded pads can delaminate. In performance racing for example pads will need to spend extended periods above 600F, and as such they are designed for that, often resulting in very poor cold friction.
 

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luthj

Engineer In Residence
Ceramic pads on their own won't necessarily improve braking though. And not all pads using the same material are equal. There are a huge range of pad materials, hence using the friction rating system is the most accurate way to determine changes.

15% better in what way though? Are you talking about braking force? If so hot or cold matters. If you mean 15% higher resistance to hot fade, that is a different matter, and often means less performance when cold, though not always.

I have switched to ceramic pads on other heavy vehicles, and found them to have lower braking force when cold compared to semi-metallic.
 
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Ferjablito

Active member
Ceramic pads on their own won't necessarily improve braking though. And not all pads using the same material are equal. There are a huge range of pad materials, hence using the friction rating system is the most accurate way to determine changes.

15% better in what way though? Are you talking about braking force? If so hot or cold matters. If you mean 15% higher resistance to hot fade, that is a different matter, and often means less performance when cold, though not always.

I have switched to ceramic pads on other heavy vehicles, and found them to have lower braking force when cold compared to semi-metallic.
It seems that this is the solution if we want to increase the quality of braking.
 

luthj

Engineer In Residence
The main question is.

Are you having trouble with brake force in general? Not being able to hold on a steep grade, or not being able to hit at least 0.7G braking acceleration for example.

OR

Are you having trouble with brake fade? Braking force drops as the brakes get hot. Such as a long downhill grade.
 

Ferjablito

Active member
Another option might be to do what I do when driving my truck... leave more space between the truck and the vehicle in front. ;)

Another option might be to do what I do when driving my truck... leave more space between the truck and the vehicle in front. ;)
The braking distance when driving on a road has little to do with emergency braking. I don't know what tests are carried out in Australia to approve tyres, but here in Europe or at least in Spain for a laboratory to certify that the tyre is suitable or not suitable, a speed and braking test must be carried out and with R17 in the braking test almost all of my colleagues had a very fair pass (in my opinion, safety in the event of an unforeseen event is worth lives).
 

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