Originally Posted by
ancker
I'm certainly not an expert but wouldn't disc brakes put a lot more stress on the spokes?
Yes absolutely. Thus, the hub/spokes need to be reinforced, adding weight. That and the addition of the disc rotor itself adds weight.
That was exactly the reason why Buell Motorcycles went with the perimeter braking system. Their current sportbike has the lightest wheel/braking system in the industry.