Originally Posted by
TandemGeek
Why not more popular on the front?
Front rim brakes work pretty well or at least "good enough" for most teams and the limited availability of tandem-rated disc forks / cost of conversion vs. easier rear installation and dual benefits of improved brake power and higher heat capacity. Add to that, discs add weight and preclude the use of lightweight carbon forks. In a weight conscious world, it's a tough sell for the average tandem consumer.
I think the Wound Up Duo full carbon fork adds about 200g over the Alpha Q fork. The wheels and the discs probably add most to the approximately 3 lbs difference between full discs and calipers.