Which Derailleur to Adjust First?
In a Nutshell, Adjust the Front Derailleur First, Then the Rear. If the Derailers Just Need Minor Tweaking (They Are Basically in Adjustment but Are "Not Quite...
In a nutshell, adjust the front derailleur first, then the rear. If the derailers just need minor tweaking (they are basically in adjustment but are "not quite right") then you adjust the one that is obviously wrong, check the overall adjustment again, then again adjust what needs adjusting.
What is B screw on rear derailleur?
Simply put, the B-Tension screw is there to control the gap between guide pulley (the upper pulley on the derailleur) and the bottom of the cogs. ... Just get the guide pulley as close to the bottom of the cog as possible without it making noise.
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Should chain touching front derailleur?
Front Derailleur Performance
The front derailleur should shift the chain between chainrings without throwing the chain off the extreme outer and inner rings. It is possible that the front derailleur will rub the chain slightly even on properly adjusted bikes.
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