Testing derailleur limits

[Limeybastard]

Once the derailleur limits have been set, what method is used to test that it is set correctly prior to riding?

 

[Limeybastard]

What will that video show me?

 

[RunForTheHills]

It will show you how to adjust the limit screws on your derailleur. Usually you put the bike in a work stand and crank the pedals by hand while shifting gears to test the adjustment.

 

[stanmiller]

Once the derailleur limits have been set, what method is used to test that it is set correctly prior to riding?

You use sight and sound as described in the Park Tools video posted by Timpo to get the derailleur dialed in (really really close). Then use the barrel adjuster on the shifter cable for fine adjustments while riding to complete the setup.

To adjust the derailleur on my Electra Townie I mount it temporarily to the car rack. For my Mongoose Envoy, I weight the front and the bike leans forward over center kickstand and allows the the pedals and rear wheel to move freely for derailleur adjustment at ground level.

 

[Limeybastard]

It will show you how to adjust the limit screws on your derailleur. Usually you put the bike in a work stand and crank the pedals by hand while shifting gears to test the adjustment.

Yeah I already know that. I was asking how to verify it has been set correctly , I re-googled and some slightly bump the hanger gently to see if the chain falls off or not.

 

[RunForTheHills]

Yeah I already know that. I was asking how to verify it has been set correctly , I re-googled and some slightly bump the hanger gently to see if the chain falls off or not.

Ah. I haven't done it that way. I make the adjustment a little too tight so you hear a rubbing sound and then move it out just a bit until it isn't rubbing.

 

[Luto]

Sound. Smooth as silk in all gears.

 

[Ebiker01]

Turn the ebike upside down and test the gears. With some degree of skill one can adjust it like that also.

 

[Limeybastard]

Sound. Smooth as silk in all gears.

Sounds like a fete with an Acera series

 

[Limeybastard]

Turn the ebike upside down and test the gears. With some degree of skill one can adjust it like that also.

That’s what I’ve been doing , cheers.
As I hand spin the crank fast I get an occasional skip in any sprocket maybe one skip if I can call it that after 40 revolutions.

 

[Ebiker01]

That’s what I’ve been doing , cheers.
As I hand spin the crank fast I get an occasional skip in any sprocket maybe one skip if I can call it that after 40 revolutions.

Could b due to the cable being maybe 1-3mm a bit loose or the chain 1 link too long and is slightly bouncing . Or maybe from the momentum of fast spinning it w/o any resistance for the whole wheel assembly . Or all of the above.

 

[Luto]

Check the spring tension and the position of the arm. It should be such that is has good tension on the chain. Could be the chain is the wrong length OR the derailleur cannot handle the combination of the front rings and the rear gears. There are limits and optimal ranges

 

[Limeybastard]

Could b due to the cable being maybe 1-3mm a bit loose or the chain 1 link too long and is slightly bouncing . Or maybe from the momentum of fast spinning it w/o any resistance for the whole wheel assembly . Or all of the above.

Thanks for the explanation.