The bottom jockey wheel on my Shimano 6500 rear derailleur (9 speed) is cracked (Shimano Part 53Z 9811 Tension Pulley Unit) and I am having difficulty in getting a replacement.

It has been suggested that I should buy a set of TACX replacement jockey wheels which would be actually be an upgrade whilst working out cheaper - sounds too good to be true. I am reluctant to move away from Shimano parts having no previous experience of TACX.

What do you reckon?http://www.bikeforums.net/images/smilies/frown.gif