cursed gears....

[2manyoranges]

Commenting on the radical Supre gear model I mentioned 'cursed gears'. You may know the problem.

A decent mech.
A fairly new chain and cassette.
A perfectly fine shifter.
Good inner, good outer.
All matched 8spd throughout or 11 etc. Cable pull ratio fine.
Chain line good.
All lubed.

And it just won't index.
Lube the chain, lube the cable, lube the mech, lube the shifter.
And it won't index.
Stretch the cable, remount it, put shifter adjuster to zero+1. Put rear adjuster to zero+1.
Check the end stop screws, check the B screw. All fine.
And it won't index, and it moves up fine but not down, or vice versa.
Follow the Shimano manual guide re getting it settled in gear two and then adjust.
Still won't index.

Recognise the transmission is cursed.
Sacrifice a chicken. Bury a dog's hair under the mangrove tree. Look a cat in the eye.

Next morning, put it in top gear, adjusters Zero+1, loosen cable bolt and then tighten cable.
Works perfectly.
Weird.

 

[Magpiegifts]

If you had sacrificed the chicken first you would of been fine

 

[d8mok]

Rule 1 of setting any gears is to check the mech hanger alignment before going any further.

 

[2manyoranges]

d8....Good one. indeed one to remember.

 

[Captain Stupido]

Rule 1 of setting any gears is to check the mech hanger alignment before going any further.

Seconded. Beat me to it.

 

[hamster]

One more, check for a hook or snag at the end of a cable outer. Sounds like sticky cabling.

 

[novocaine]

under BB cable routing, always (ALWAYS) check the cable guide is clear of muck and gumption.

 

[2manyoranges]

NovoC - yes, or that the cable guide hasn’t had a ground strike….

Oh - and never buy a frame with poorly thought-through internal cabling - Cannondale BadBoy a case in point…

 

[novocaine]

never had an issue with internal cable routing. always used a vacuum and a thread to pull new cables through when guidelines haven't been used.

have to say that I rarely have an issue with cursed gears unless it's a worn out cassette.
i have had a few come past my hands where someone has missed a spacer on the 2-3 sprocket though, that has resulted in some head scratching by others before now. I always set the lower adjustment without a cable installed.

might help that a surprising large number of my bikes are single speed though.

 

[xtaffa]

Rule 1 of setting any gears is to check the mech hanger alignment before going any further.

Do you need the highly specialist tool to do this right? Wondering whether my standard approach of eyeballing is working or just haven't come across a bent one yet!