Voltron
1 MW
From Hayes tech manual...
"The reason for the spoke design is that there are two sources of stresses in the rotor. The first is mechanical stresses due to torque and the second is thermal stresses within the rotor. As the braking surface heats up, it expands. The inner portion of the rotor near the hub is comparatively much cooler. With the outer braking surface expanding with higher temperature and the temperature of the center remaining largely unchanged a thermal stress is imparted on the spokes. The spoke design is specified such that the mechanical stresses and the thermal stresses occur in opposite orientations, attempting to cancel each other out and lowering the total stress in spokes as opposed to adding together. The result is the “sweeping forward” spoke pattern."
It's worth remembering a major design goal for normal bike gear is to save weight... And if you're going for minimal weight, legs forward maybe is better for regular leg powered riding. Once you don't care about saving grams, and loads and weights go up then overbuilt to where it doesn't matter about the legs is prob better.
Also, not always the case, but some of the rotor failures go back to a loose or missing rotor bolt...
"The reason for the spoke design is that there are two sources of stresses in the rotor. The first is mechanical stresses due to torque and the second is thermal stresses within the rotor. As the braking surface heats up, it expands. The inner portion of the rotor near the hub is comparatively much cooler. With the outer braking surface expanding with higher temperature and the temperature of the center remaining largely unchanged a thermal stress is imparted on the spokes. The spoke design is specified such that the mechanical stresses and the thermal stresses occur in opposite orientations, attempting to cancel each other out and lowering the total stress in spokes as opposed to adding together. The result is the “sweeping forward” spoke pattern."
It's worth remembering a major design goal for normal bike gear is to save weight... And if you're going for minimal weight, legs forward maybe is better for regular leg powered riding. Once you don't care about saving grams, and loads and weights go up then overbuilt to where it doesn't matter about the legs is prob better.
Also, not always the case, but some of the rotor failures go back to a loose or missing rotor bolt...