Are 4 piston MTB disc brake callipers usually compatible with hydraulic road levers?
#1
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Are 4 piston MTB disc brake callipers usually compatible with hydraulic road levers?
hello
would 4 piston MTB disc brake callipers work with hydraulic road levers, particularly on sram brakes ?
I was not sure there’s no problem as 4 piston calipers would require larger volume on reservoir in levers.
many TIA !
would 4 piston MTB disc brake callipers work with hydraulic road levers, particularly on sram brakes ?
I was not sure there’s no problem as 4 piston calipers would require larger volume on reservoir in levers.
many TIA !
Last edited by Quintessentium; 09-11-20 at 09:37 AM.
#2
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[Homework] Learn: a bit of fluid dynamics,, kind of like economics_ supply & demand..
how much is displaced by the master cylinder piston, And what is the displacement volume of your 4 slave piston cylinders?
how much is displaced by the master cylinder piston, And what is the displacement volume of your 4 slave piston cylinders?
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#4
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maybe only way to detemine that is experimenting by myself probably?
Last edited by Quintessentium; 09-11-20 at 11:30 AM.
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They might also need differently-sized master cylinders. The variables of master piston diameter and throw, lever mechanical advantage and slave piston diameter and number, and throw all interact, it is more complex than cable-operated brakes.
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#7
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True, but with the popularity of gravel and cross riding, there's likely to be a demand. For Shimano, the mtn levers are the same for one and two piston calipers, the same seems to be true for SRAM.
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Why not just use the recommended levers of the same group and manufacture? Otherwise if you already have it, then give it a try and see first hand. Or keep some money in the budget to buy new levers if you want to experiment with your current levers.
#9
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and having flat levers don’t seems too bad
#10
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thanks for sharing it 😊
Last edited by Quintessentium; 09-11-20 at 11:52 AM.
#11
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It's true that with cars you size the master cylinder to match the brake caliper piston diameters and it makes a big difference in effort required and ability to modulate. That said, it's also true that Shimano uses the same master cylinder in the lever between 2 and 4 piston XT brake calipers, but the total combined area of the pistons is not massively different between the 2 and 4 piston calipers. I can feel a subtle difference between the 2 systems freshly bled, where the 4-piston setup has a bit more travel and more sudden engagement, which is consistent with what happens when you undersize the master cylinder on a car.
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#13
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thank you for a way
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I haven't tried them. But they are designed to be compatible, which in turn suggests that something like XT quad pistons might work as well (A=B and B=C implies A=C).
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What I will say is that shimano 105 levers will work with cheap deore calipers. Those are two pot calipers. I would be that they work fine with the 4 pot calipers.