difficult RD downshift

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01-08-16 | 07:32 PM

#26

Miele Man

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Joined: Jun 2014

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From: Ontario, Canada

Bikes: iele Latina, Miele Suprema, Miele Uno LS, Miele Miele Beta, MMTB, Bianchi Model Unknown, Fiori Venezia, Fiori Napoli, VeloSport Adamas AX

Check the arc of the cable housing at the rear derailler.

Check that the rear derailler cable is not binding in that arc of housing.

Check that all ends of the cable howsing are clean ie there are no ting 'hooks' left from cutting the cable housing.

Check that the ferrules have not deformed. Last year i got a bunch that deformed with sone actually allowing the housing to pull through them.

Check that the cable housing isd CENTERED over the hole in the bar-end shifter that the inner cable leaves through.

Lube the bare inner cable with quality grease. I use MARINE grease for this.

Check that the upper cage of the derailler is clearing the cogs.

Good luck and cheers

01-16-16 | 02:40 PM

#27

Aubergine

Francophile

Joined: Nov 2015

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From: Seattle

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Quote:

Originally Posted by engineerbob

Just to add to my confusion, my Suntour Vx has the usual two screws: "L" and "H" possibly corresponding to "low" and "high". The former limits how far the derailleur can move toward the large sprocket, whereas the latter limits movement in the direction of the small sprocket. From that I would conclude that the small sprocket is a higher gear than the large, and that shifting from small to large would be described as "down-shifting."

Bob

Yes, that is how I would explain it also. It is like in a car- the easy gear is first, the one for speed at low rpm is high.