Originally Posted by
djedgar
We have a Beyond with the Winzip. Our team is in the 380 lb range so use of brakes on a downhill will be much more than required for a lighter team. Avid discs or regular calipers might work OK for a light team but add 80 or 90 and it is another ball game.
As I understand it, the power of the a disc brake is related to the size of the disc, not necessarily the brake. That's why down hill mtb bikes have 203 mm discs up front while cross country mtb bikes are fitted with 160 mms. One tandem shop owner and stoker I know are heavier then your team and did fine with an Avid brake and a 10 inch disc.