Хроники Города Глупова - Помощь клуба: Велосипедное: SRAM X-7 rear derailleur
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Помощь клуба: Велосипедное: SRAM X-7 rear derailleur|
Last time I cleaned/greased it (using a clip-on gadget with brush wheels)
was about 100 km ago, and these 100 km were mostly paved bike trails plus
maybe 15 km of dirt/cross country. Prior to that I rode nearly 1k without
ever noticing anything wrong, except maybe half a dozen occasions described
above. After I got my bike, I did some tweaking of the rear derailleur,
although not having any experience at all I perhaps didn't do it properly.
well, you will learn.
(1) these brush wheeels devces are useless.
(2) cerosine or bensin bath is the best for any chain and u can try it AFTER "brush wheels" if u want to c for yourself the difference.
(3) and it is not possible to verbalize how to sense "anything wrong" it is between the hearing and the touching...
(4) don't hesitate to bend chain by fingers, it must bend at each link effortlessly -- opposite means: u failed to pay enough attention to it.
There are good videos on yt about tuning the derailleurs. Just make sure not to use any Russian language guides, I found them misleading. In reality there are around 5 parameters to tune (low/high limit, coarse and fine cable tension, and f-screw which is rarely needed). Turn Hi/lo screws first, make sure the chain doesn't fall off hi/lo gears and there's minimal noise when the chain is rolling over them then iteratively adjust cable tension until swithching is smooth. Then you only have to use barrel adjuster once in a while after you remove the wheel etc. Cheap derailleurs don't hold settings tight, so they need to be finely adjusted often. But the cable will stretch anyway, so it's not just about derailleurs.
and don't worry too much if u have to push shifter a little beyond "the click" when switching from smaller to bigger gear -- it is normal to some extent (particularly under load) (while oppesite movement must be smoother)