True. But, remember that Avid's endorsement only applies to its BB disc calipers when used in conjuction with the 203mm rotors and only for use as primary front and/or rear brakes, not as a drag brake. You'll need to consult with an authorized Avid dealer to piece together the right brake set-up for your tandem to ensure you end up with 203mm rotors front & rear. Moreover, anyone using a stock Avid BB rear disc may want to consider adding non-compressable cable housing and a helper return spring to the rear caliper to improve brake lever response if you still find the rear brake's performance to be somewhat lacking.