MattyCiii wrote: Farfle wrote:
I thought the "spokes" of a disc brake rotor were supposed to be angled forward? I'm no expert but with all that power, hate for there to be a high speed/high power front brake failure!
A disk brake rotors spokes are ABSOLUTELY NOT supposed to point forwards, and the reason is this:
In what direction is a spoke its strongest, tension or compression?
If you answered compression, you have some reading to do. Bike rotors get away with compression loaded spokes because they never experience braking loads severe enough to have to use their structure, and they do it because it looks cool, and therefore sells better.
With the gatorbrake 6 piston calipers on the dual pie. We had two identical rotors, and I had intended to have a spare. While doing some abuse testing in the conventional diection, the front rotor violently shredded apart and tore itself off of the hub. Looking at it, all of the spokes had folded up. When we put the rotor on backwards, it still warped and was thrown away, but there was no violent failure. (The rotors were a magura gustav 210mm, not cheap by any stretch)