View Single Post
Old 11-19-19, 03:41 PM
  #19  
dddd
Ride, Wrench, Swap, Race
 
dddd's Avatar
 
Join Date: Jan 2010
Location: Northern California
Posts: 9,194

Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

Mentioned: 132 Post(s)
Tagged: 0 Thread(s)
Quoted: 1565 Post(s)
Liked 1,296 Times in 866 Posts
Great pictures, I'm glad to see that this bike isn't a mess.

All looks good, but what can't be seen is how far outward that the cage moves when the shift is actually occurring, before letting go of the upshift lever.
It should always be able to move slightly beyond the position that it comes to rest at, so that the rest position (after the upshift has been completed and your hand released) is not solidly up against the hi-limit screw tip (otherwise the cable tension will tend to force downshifts in response to even slight flexing of the downtube and seattube junction).
The slight bit of allowable cage travel beyond the rest point also makes shifting faster and easier on your hand muscles, and improves the service life of the G-springs, cable and derailer. The same applies to the rear derailer btw, except that it is the lo-limit screw that must not be set too tight (noting also that any subsequent cable tension adjustments will affect how the limit screw setting intercedes at the travel limit where the largest sprocket is engaged).
dddd is offline