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Frank Krygowski <frkrygow@sbcglobal.net> wrote:In theory, calculating spring degradation over cycles is extremely complex but in practice, within a human lifetime, derailleur springs do not noticeably degrade*.On 4/23/2024 7:36 PM, Roger Merriman wrote:If the spring has got tired maybe be a bit slower, I did have one that forFrank Krygowski <frkrygow@sbcglobal.net> wrote:>... I'm pretty sure I still have the Huret Svelto derailleur that wasMy first road bike was that as well it was old at that point, Suntour in
original equipment on my first ever ten speed - back when "ten speed"
meant 5x2.
>
this case, I did upgrade it to modern 10s mainly it was massively over
geared particularly for someone who rides around Wales from time to time!
>
But old derailleurs seem to last, seem to remember the shifting was about
the same both systems using down tube shifters, though rear was indexed for
the modern one, but front was left friction.
I rode with that Svelto for a few years. One of my first little bike
splurges (when we had very little extra money) was to change to SunTour
rear derailleurs. The difference in shifting was enormous. And the
SunTours also allowed bigger rear cogs, especially helpful for my wife.
>
I suspect the Svelto would now shift as well as it ever did. I do think
old derailleurs last a long time.
>
that reason ie it shifted but really quite slowly, that I replaced it with
a new derailleur 9s being so cheap.
But yes they seem to last and for road bikes not much technology
advancement over last few decades, different to MTB/Gravel which have
clutches and what not.
Roger Merriman
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