In BIKE 8/12 we went into detail on how to convert to Shimano's I-Spec clamp. This costs 39.95 euros for the XT, while the retrofit kit for the XTR costs 69.95 euros. Next year, there will also be an I-Spec solution for Shimano's SLX groupset.
In contrast to Shimano, the clamp cure works much faster and easier with SRAM shifters and Avid brakes. A set of the latest Matchmaker clamps costs 54 euros. It is called Matchmaker X and is compatible with all shifters and the current brakes of the XX, X0, Elixir 9, Elixir 7 and Elixir 5. The clamp is also available individually for 27 euros and in the colours black and silver.