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From the picture posted, I think this is the relevant techdoc from Shimano for correct installation and setup of the rear mech on your hybrid.
Print ( or enlarge on screen) and follow step by step.
Before doing all that though, grab a bare bit of rear mech cable (under the downtube is a good place) and give it a good pull outwards from the tubing. If this pulls the mech over without any trouble it's probably not seized. If it feels tough / binding - replace inner and outer(s).
P.s. Position of arm changes relative to gear selected, so difficult to answer your last point on that.
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My point was that you shouldn't be doint one with out the other.
All part of the same job innit.
Pretty much, although if you were to re-cable an already setup geared bike, you'd not adjust the limits as they're not influenced by the cable but remain a constant within the rear mech. It'd be good practice (and a couple of seconds job) to check the limits before fitting the new cable though.
Slight tangent, have found limit screws useful to help bodge a slightly spinnier single speed for a riders gear cable after it snapped on a club ride, otherwise don't touch once set.
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Thanks for the responses.
It seems that adjusting the L&H screws may not be the solution. The chain is not slipping off the freewheel - ie no over or undershifting is occuring. The gears are shifting correct.
The slipping happens in any gear so don't think it is worn teeth on the cassette.
Chain tension or arm tension sounds closer to the problem. When I turn the pedals the chain just doesn't have enough tension to take hold of the rear cassette.How do I resolve this? Would I still need to adjust or reindex cables?
Clean and re-grease all the moving parts of the rear mech also.
Chain too long could also contribute perhaps? Would need to get hands on to really get to bottom of problem, but there's enough info now in this thread to help you get to the solution I reckon.
Hasn't he already messed with the limit screws? Might be worth putting those right before re-indexing.
Naturally, yes.
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why mess with the L&H screws? These limit the movement of the rear mech to stop overshifting at either end, or undershifting i.e. not picking up 1 or 8 in the example given...
Sounds like an issue with cable tension, possibly rust in the cable housing stopping the cable operating proper. I'd recable the whole thing and re-index from there to get the cable tension spot on.
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[ame="http://www.youtube.com/watch?v=iIzqQOs_IrI"]YouTube
- Nuyorican Soul - I Am The Black Gold Of The Sun (4 Hero Remix)[/ame]The Rotary Connection version this covers is well worth a listen also.
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^ given the temps the descent to charlesworth on that route would be lethal at the mo imo - there was a lot of water running down the steepest bit a couple weeks back... Lovely any other time though.
Been getting to know pott
shrigley too - nice ups and downs but again not sure i'd head there in sub zero.[/partypooper]
You may get a lower risk (but flatter, and no doubt still icy in places) ride out towards Tatton Park via Hale etc
For info my club (tri) ride leaders are discussing sacking off road rides when icy and going mtb'ing instead. I think this is a good idea.
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^ my head is now spinning.
Things i thought of whilst reading all that:
Cycle Training isn't necessarily for increasing numbers but for helping the current cycling population become safer cyclists. Trained cyclists are very much the minority still. If all of those riding today followed the National Standard, drivers would come to accept the practices displayed as the norm.
European approach is wrong? If you've the space and the support of the people, why not segregate? The numbers in Holland and Copenhagen stack up.
I do agree we should focus more on road cycling and interaction between motor vehicles and riders here in the UK though as there's simply not the space (or ease of planning process) to build enough of a segregated infrastructure.
Unrelated afterthought... I'm sat here in Whitefield drinking coffee watching an endless stream of almost entirely sole occupancy car traffic heading along the A56 and it's very depressing to think our gov't wants to keep growing this for the sake of the economy.
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this is all great for your business Clive- well done again,
on the bigger picture, have you seen the news today r.e train fares?
this shower of shit government are as dedicated to keeping people in the cars as ever before- it makes it harder than ever for ordinary people to change.
My work post is paid for indirectly by the government through the P.C.T,
Im not pissing into the wind any longer, fuck this government handing my notice in today, Im going back to cycle training and freelance work- bring it on.Dude, getting the sentiment but please don't quit. You're one that's making a difference. Use the funding and your position to subvert the government line. Quitting lets them win, even if you'd only be postponing until March like the rest of us.
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Silver Condor fixed near st peters square about 11am. Was the only other bike i saw being ridden on my ride from Chorlton to Northern Quarter today, so chapeau!