Francesco, from my bit of research, Avids are good brakes however as stated in another post, the red plastic knobs can melt due to heat. I am going to mount Interloc/Winzip dual action mechinical disc brakes on our tandem with 203mm rotors front and rear. Do a "google" search for Interloc Racing Designs, and you should be able to find a bunch of info on these brakes.