Been floating about a bit & found the same Beringer (France) callipers listed for the 955i, as for the TBS & SM. I'll get in touch with a few breakers to see if I can locate a pair of the stock Nissins from a 955 & measure them up. I could still do with the tech specs on the belt drives though, if any of you kind gentlemen would be so obliging. I've found 1 listed @ £900! But I'm afraid that's just too silly for comment. The TT callipers could probably be mounted on a bracket but I'd rather utilise the existing mounts "as is".
