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PostPosted: Sat Feb 02, 2013 12:46 pm 
Old School Hero

Joined: Sat Mar 17, 2012 8:42 pm
Posts: 241
Location: Warrington
Sorry this is a new MTB question! I have a Cube I bought end of last year, its was in the sale and a good deal. I went out on my first ride a week before Christmas, went through a puddle hiding ice and broke my leg :oops:

Any how, I noticed the gears were out whilst riding home with said busted leg.

I have been meaning to get the gear indexing setup but having trouble, first thing I have noticed is there is no barrel adjustment on the rear mech, so I presume all adjustment is done at the front shifter, I don't seem to have much room to adjust it. Is it best to loosen off the cable and stating from scratch, should the barrel adjuster be sent somewhere in the middle?

Also which should be setup first, front or rear mech... having trouble with both.

Finally in a 3x10 setup is it normal for chan rub whilst in a "cross chain" position? If I was to dump the large front chain ring would setup be any easier?

Sorry I am a bit simple went it comes to bike mechanics, but willing to learn and find the parktools site useful.


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PostPosted: Sat Feb 02, 2013 3:08 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Thu Feb 24, 2011 1:15 am
Posts: 1887
Location: Getting fitter, I will beat the Surrey Hills....
Personally, I set the rear up first. Loosen the cable and wind the barrel adjuster on the shifter back in. ser the limit screw for the H so that the top jockey wheel sits squarely under the big cog at the back. Now pull the cable tight and nip the bolt up. Not too tight, but so there is only a tiny bit of slack. Now shift through all gears and adjust L limit screw so the top jockey wheel now sits directly under the small cog. Cable should be nice and tense now. Thats the limits set.

Providing you have set up with sufficient tension then the gears should, in theory, index just fine. Use the barrel adjuster on the shifter if shifting is a bit slack. Also, before I forget, set the B screw on the mech so that the jockey wheel sits about 3-5mm from the biggest sprocket. There are zome good tutorials on youtube for this. Front mech setup is basically the same but without the B adjuster on it.

http://m.youtube.com/watch?v=SjJfKO_tAo0


Hope this helps!

Dan


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PostPosted: Sat Feb 02, 2013 5:56 pm 
Old School Hero

Joined: Sat Mar 17, 2012 8:42 pm
Posts: 241
Location: Warrington
Perfect thanks.


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PostPosted: Tue Feb 05, 2013 5:03 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8204
Location: New Forest, UK
If you crashed the bike then firstly I would check that the derailleur hanger is not bent - otherwise you will struggle to get it to work smoothly. Your LBS should have the tool in their workshop.


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PostPosted: Tue Feb 05, 2013 5:26 pm 
Old School Hero

Joined: Sat Mar 17, 2012 8:42 pm
Posts: 241
Location: Warrington
Thanks, checked things over not a single mark or damage I can see, inc bent hanger, frame, derailler.

With some trial and error I got it indexing perfectly, with a twist of the shifter barrell adjusters (I thought I was at the limit, but turns out I had over done it), the front mech was improved with the limiter screws.

Was thing of going down to 2 X 10 at some point, do these shimano shifters have a 3x to 2x switch? Its is last years XT.


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PostPosted: Tue Feb 05, 2013 5:29 pm 
retrobike rider
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Joined: Thu Oct 14, 2010 1:33 pm
Posts: 3974
Location: Brighton
Whatleymeister wrote:
...... set the B screw on the mech so that the jockey wheel sits about 3-5mm from the biggest sprocket.....


i have NEVER done this.....:shock: will be checking this when i build my next bike!!! lol


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PostPosted: Tue Feb 05, 2013 5:53 pm 
Old School Hero

Joined: Sat Mar 17, 2012 8:42 pm
Posts: 241
Location: Warrington
twain wrote:
Whatleymeister wrote:
...... set the B screw on the mech so that the jockey wheel sits about 3-5mm from the biggest sprocket.....


i have NEVER done this.....:shock: will be checking this when i build my next bike!!! lol


Isn't this wehat they call "angle to the dangle"?


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PostPosted: Tue Feb 05, 2013 11:44 pm 
retrobike rider
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Joined: Thu Oct 14, 2010 1:33 pm
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Location: Brighton
mattrixdesign2 wrote:
twain wrote:
Whatleymeister wrote:
...... set the B screw on the mech so that the jockey wheel sits about 3-5mm from the biggest sprocket.....


i have NEVER done this.....:shock: will be checking this when i build my next bike!!! lol


Isn't this wehat they call "angle to the dangle"?


always wondered what the purpose of that screw is......:oops:
never had issue before by not doing it though :P

just did it tonight on my latest build. will see if it makes any marked differences when i come to ride it.....


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