The only thing that moves on a disk brake, is the lever and the pads... unless its mechanical then it has a little swing arm thingy. Works AMAZING in wet/dry/ice/snow any weather Lots of things move on a V-brake... 2 calipers, lever, pads... works good in wet (as simon says ) 2 things can move on a maggy... pads, lever, BUT works bollocks in the rain/wet, pads wear down quick, can mess up easily. GET A DISK