Kell
Veteran
- Location
- High Wycombe/London
Slightly convoluted story...
I recently had to replace a rim, so got the hub serviced and new sprockets on the back.
The new ones seem to come with a yellow plastic spacer rather than the old metal one, and I was having some difficulty shifting down on to the lower cog. i.e. when changing down from 5th to 4th. I could shift the hub gears, but not the sprockets.
I know I'm still on my original chain tensioner, and it's looking like it's out of alignment and fairly worn, so bought a new one and fitted that, but it only seemed to make things worse.
I ended up tinkering with the spacer, and re-installing my original tensioner and everything shifts as it should.
As far as I can tell, the reason it wouldn't shift is that the spring in the dogleg didn't seem to have enough power/tension in it to push the new jockey wheels far enough over to shift. Remove the chain tensioner and it would do it, and it would eventually do it on my old worn one with a bit of fettling as it's so loose it doesn't offer up much resistance.
For the record, the grub screws are not preventing it from making the shift - everything is as it was before the sprockets were replaced.
So, my question is this. Is there a way to increase the power in that spring without replacing it? I don't want to just buy another one if there's something obvious I could do.
Or would replacing it give it the extra punch it needs to make the shift?
I recently had to replace a rim, so got the hub serviced and new sprockets on the back.
The new ones seem to come with a yellow plastic spacer rather than the old metal one, and I was having some difficulty shifting down on to the lower cog. i.e. when changing down from 5th to 4th. I could shift the hub gears, but not the sprockets.
I know I'm still on my original chain tensioner, and it's looking like it's out of alignment and fairly worn, so bought a new one and fitted that, but it only seemed to make things worse.
I ended up tinkering with the spacer, and re-installing my original tensioner and everything shifts as it should.
As far as I can tell, the reason it wouldn't shift is that the spring in the dogleg didn't seem to have enough power/tension in it to push the new jockey wheels far enough over to shift. Remove the chain tensioner and it would do it, and it would eventually do it on my old worn one with a bit of fettling as it's so loose it doesn't offer up much resistance.
For the record, the grub screws are not preventing it from making the shift - everything is as it was before the sprockets were replaced.
So, my question is this. Is there a way to increase the power in that spring without replacing it? I don't want to just buy another one if there's something obvious I could do.
Or would replacing it give it the extra punch it needs to make the shift?
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