Rear brake pads
13 December 2007, 10:59 AM
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Rear brake pads
People are always asking about “the best brake pads for the front” but what about the rear?
How much work is done by the rear?
I have 4 pots on the front and 1 pots on the rear, I’m looking to replace all the pads so I’ve decided to fit DS2500 on the front but what should I fit on the rear’s?
How much work is done by the rear?
I have 4 pots on the front and 1 pots on the rear, I’m looking to replace all the pads so I’ve decided to fit DS2500 on the front but what should I fit on the rear’s?
13 December 2007, 07:47 PM
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I did the fronts at the start of the year....
Couple of months ago swapped the rears, and the brakes feel so much better now. DS 2500 all round, rear pads weren't that worn so must be the new ones that made the difference.
Dunx
02STI
Couple of months ago swapped the rears, and the brakes feel so much better now. DS 2500 all round, rear pads weren't that worn so must be the new ones that made the difference.
Dunx
02STI
18 December 2007, 03:24 PM
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Why?
The rear brakes do very little work on Imprezas so temperature is not an issue. In fact, increasing the rear bias can help braking performance. Retardation is related to the coeficient of friction of the pads. Although different pad compounds have different coeficients of friction, they are sufficiently close as to be the same. Greater variations in brake loading are experienced when the car is loaded or not. If the rear seat is occupied, the rear weight is much greater so there is greater grip. For a given pedal pressure, the rear braking effort is a lower percentage of that available.
The other aspect is the temperature characteristics. Since the rears do so little work, low temperature performance is more important than high. That is where standard pads perform well so stick with them unless you have a problem. In a perfect car, the brakes would be sized that the rotor temps rose and fell at the same rate. Then the same material should be used at each end. However, the world and Subaru's aren't perfect.
Oh for a variable balance system.
John
The rear brakes do very little work on Imprezas so temperature is not an issue. In fact, increasing the rear bias can help braking performance. Retardation is related to the coeficient of friction of the pads. Although different pad compounds have different coeficients of friction, they are sufficiently close as to be the same. Greater variations in brake loading are experienced when the car is loaded or not. If the rear seat is occupied, the rear weight is much greater so there is greater grip. For a given pedal pressure, the rear braking effort is a lower percentage of that available.
The other aspect is the temperature characteristics. Since the rears do so little work, low temperature performance is more important than high. That is where standard pads perform well so stick with them unless you have a problem. In a perfect car, the brakes would be sized that the rotor temps rose and fell at the same rate. Then the same material should be used at each end. However, the world and Subaru's aren't perfect.
Oh for a variable balance system.
John
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19 December 2007, 12:18 PM
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