Chain slips over chainrings

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tomsimmonds
Posts: 46
Joined: Mon Jan 06, 2014 13:04 pm

Chain slips over chainrings

Postby tomsimmonds » Sat Feb 22, 2014 10:14 am

Hi,

I was out riding my roubaix yesterday and every time i picked up pace and wanted to go into the big ring on chain set the chain slipped over and came off completely. Im guessing i need to adjust front mech. If so what do i need to adjust?

thanks

Tom

arlowood
Posts: 1889
Joined: Fri Jul 02, 2010 18:26 pm

Re: Chain slips over chainrings

Postby arlowood » Sat Feb 22, 2014 11:18 am

Sounds like your FD cage has moved so that it is moves too far when you try to shift onto the large chainring.

You need to use the top/high adjuster screw on the front derailleur and turn it clockwise a quarter of a turn then check if the changing is OK. If you still have problems try another quarter turn and so on until then problem is cured.

Details are provided here if you want to study all the set up procedures

http://techdocs.shimano.com/media/techd ... 696762.pdf


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