Dodgy shifting - time to fix it!

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JimboPlob
Posts: 318
Joined: Mon Jan 24, 2011 12:11 pm

Dodgy shifting - time to fix it!

Postby JimboPlob » Mon Jan 07, 2013 14:54 pm

Hi

I have a CAAD9 which I purchased 2nd hand. It came with Dura Ace 7800 equipment. The shifting was never that great at the rear.

I set about changing the cables (inners and outers), rear mech and hanger. Still the shifting is bad. It seems to be that the lever doesn't move the cable enough to cleanly engage the next gear. I often have to click it and then feather it some more to shift. This then means down shifting (to smaller cogs) is problematic.

I am starting to think it could be something to do with the shifter itself. Is that likely? I have put up with this s**t shifting for far too long!

Please help me on my quest!

Thanks

SmoggySteve
Posts: 2362
Joined: Sun Nov 04, 2012 20:10 pm

Re: Dodgy shifting - time to fix it!

Postby SmoggySteve » Mon Jan 07, 2013 18:09 pm

Does this happen in all gears or does it happen higher/lower in the cassette? is it more difficult on the higher/lower ring on the front?

What you could do is take the chain off and watch the rear derailleur as you shift up and down to see how in line it is to the gears. It may be an alignment fault or a bent derailleur could cause difficult shifting. Are the gears as problematic with no chain on?

JimboPlob
Posts: 318
Joined: Mon Jan 24, 2011 12:11 pm

Re: Dodgy shifting - time to fix it!

Postby JimboPlob » Mon Jan 07, 2013 21:19 pm

Worse with the smaller gears (i.e. where the cogs get smaller)

JimboPlob
Posts: 318
Joined: Mon Jan 24, 2011 12:11 pm

Re: Dodgy shifting - time to fix it!

Postby JimboPlob » Tue Jan 08, 2013 14:57 pm

Any other ideas?

onbike 1939
Posts: 705
Joined: Thu Dec 09, 2004 10:00 am

Re: Dodgy shifting - time to fix it!

Postby onbike 1939 » Sun Jan 13, 2013 16:59 pm

If you have changed the inners and outers and the indexing is correctly adjusted then best to look at the der. hanger. From directly behind the rear block, check that the top pulley is directly perpendicular under the sprocket carrying the chain.

DesWeller
Posts: 5233
Joined: Mon May 05, 2008 15:36 pm

Re: Dodgy shifting - time to fix it!

Postby DesWeller » Sun Jan 13, 2013 17:56 pm

Yep mech hanger is your best bet. Make sure you're clamping the cable on the right side too.


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