Shift Cable Adjuster Sensitivity
Is there a difference in the sensitivity of adjustment between the barrel adjuster on the rear derailleur
vs. a downtube cable stop adjuster with the adjustment wing?? I would have to believe that the downtube adjuster is a bit more coarse than the barrel adjuster, but I am not sure. |
not really .. thing is the one on the rear is where you can watch its effect as you turn it , on the repair stand, turning the pedals..
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They are almost 6x1mm or other close x1mm threads so 1 turn = 1mm of cable length adjustment.
You can get metric bolts in other thread counts (depending on the diameter) like .25, .50 and .75, but they are rare on bicycles. See this article for the effect of a 1mm cable length change. http://blog.artscyclery.com/science-...compatibility/ |
You can adjust the barrel adjusters in less than 1 turn increments,tho.
There is sometimes an external star wheel on the adjuster in order to make it easier to turn the barrel, and those are usually detented in half-turns (?). Are nit the downtube adjusters, which have stepped ramps, a bit more coarse? |
Originally Posted by andr0id
(Post 18294535)
They are almost 6x1mm or other close x1mm threads so 1 turn = 1mm of cable length adjustment.
You can get metric bolts in other thread counts (depending on the diameter) like .25, .50 and .75, but they are rare on bicycles. See this article for the effect of a 1mm cable length change. Art's Cyclery Blog » Science Behind the Magic | Drivetrain Compatibility |
the M6 are less likely to break off.
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Originally Posted by fietsbob
(Post 18296069)
the M6 are less likely to break off.
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The downtube cable stop adjuster for the rear is not threaded; rather, it has a stepped ramp that has 6 or 8 positions available.
Anyone know the incremental change for each of these ramp stops? |
Just leave it centered and do your fine adjustment at the RD. These are for quick adjustment when swapping wheels during a race. IIRC on some of them the ramp assembly can be removed and replaced with a traditional adjuster.
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Originally Posted by Ronno6
(Post 18296234)
The downtube cable stop adjuster for the rear is not threaded; rather, it has a stepped ramp that has 6 or 8 positions available.
Anyone know the incremental change for each of these ramp stops? |
Originally Posted by SJX426
(Post 18296577)
Use calipers to measure.
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