Thats my issue with 40mm rears, sounds like im carrying a bag of spanners in the back everytime i hit a bump, 1st set cateyes would do it - 3rd only speed bumps and maedium potholes set it off
Im lucky that i bought them from
www.chillijamvans.co.uk and they are happy to post replacements in advance and been really helpful about it all, top guy