They're items that are twisted/flexed constantly. They will eventually harden and snap and cause a shitty accident. Seems as they cost £20 and it's easy and practical to change them, why would you run them beyond 'definitely safe'.
All those decade old 3t and cinelli ones seem to be doing just fine
But in all fairness, aluminium frames are also subject to a lot of twist and flex, especially in the extremes like the seat/chain stays and head tube area, think when riding hard out of the saddle, but I appreciate your point about erring on the side of caution
^^ Have a think.
They're items that are twisted/flexed constantly. They will eventually harden and snap and cause a shitty accident. Seems as they cost £20 and it's easy and practical to change them, why would you run them beyond 'definitely safe'.
lol. The ones that haven't snapped are, yes.