I want to change my V-brake to disc brake on my Top Fuel 100 (2005 version - silver). Do anybody know if a special "trek" adaptor is required to be installed before mounting the brake adaptor?

On the other hand, the seatclamp dimension is 40mm, which is very difficult to be found in the market. Is there any suitable clamp from other manufacturer as I have damaged my Bontrager 40mm QR comes together with the frame?

It seems to me Trek should think about avoiding this kind of non-standard dimension on the bikes to allow more aftermarket product to be chosen.

Thanks a lot.