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1

Your simple answer is essentially correct. A hydraulic system is going to maintain a pretty constant mechanical advantage and frictional losses will be trifling. So 8/7 more force on the rear will provide identical torques on each wheel provided the pad friction response is linear, As pointed out, identical torques won't mean much as each wheel is under a ...


2

In the hypothetical case where you can get accurately from zero braking to edge of traction, you still need to consider jerk: https://en.wikipedia.org/wiki/Jerk_(physics), especially part "Physiological effects and human perception of physical jerk". In reality, you still need modulation to adapt to differences in traction. Also, your XT brakes are fine and ...


4

If by efficiency you mean braking power then yes maximum braking power is right at the verge of locking up. Braking does not need to be performed at maximum braking power. Often you don't need to slow down or stop as fast as possible. There is static and kinetic friction. Kinetic is when the wheel skids. Kinetic friction is lower so once you start to ...


1

Inherently, a lack of modulation provides a lack of "feel" to your braking. That lack of feel translates into an On or Off level of braking rather than a gradual application of the brakes. Accurate braking to scrub of speed means faster cornering out on the trails (or road). Carrying the right amount of speed into corners means carrying more speed out of ...


4

You say "Surely the brakes should always be used to near maximum stopping power". This is where the first need for modulation comes from. Stopping power has at least as much to do with grip between the wheel and the road than the torque your brakes can except on the wheel. Maximum stopping power comes from the front wheel (plenty of discussion about that ...


1

Personally I'd (initially) try taking the top off the reservoir in the lever (while it is level!) and pumping the brakes slowly, topping up the reservoir if necessary, then pumping some more while tapping the brake itself then tapping the hose from the brake to the lever. If you top up he fluid in the reservoir too much while the pads are worn you will need ...


3

Tracking down issues with brakes can be difficult. If the brakes are spongy feeling initialy and pumping them firms them up then you probably have air in the system. if that's the case then it will be a bad bleed or the seals or possibly the brake hose but working out which is often down to luck. If they just have no power it could be contaminated pads. If ...



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