The chain need to be replaced when it is stretched past the specified length (319.4 mm for twenty links) and that usualy happens well before it is "worned out". In my opinion (well aware of opening can of worms here) it is just another useless gizmo squirting oil on the road in a very technologically advanced way. Talk about form over content ......
"The eSystem measures acceleration and vibration in 'G-Force' using a triple axis accelerometer and displays this information on screen allowing riders to monitor activity." WOW that is really good to know
"The eSystem measures acceleration and vibration in 'G-Force' using a triple axis accelerometer and displays this information on screen allowing riders to monitor activity." WOW that is really good to know


"It is not a shame to not know, the shame is to not know and not to ask"