Shifter Slipping

Workshop tales, trials and disasters.
Maintenance tips, techniques and myths.
Technical discussion, description and outright lies

Shifter Slipping

Postby Trev Campbell » Fri Jul 18, 2014 11:38 am

Hi Guys, My bike is running 105 Brifters and derailers. Recently I've had to start multiple shift changes to get it to change up a gear. To explain it better. Sometimes when I want to shift up, I push the lever and nothing happens, no gear change occurs. If I press the lever again (Sometimes it will take 2-3 lever presses) it will change gear, when the gear change happens its a correct gear change, no skipping and correct cog selection. When the change doesn't occur the lever has no resistance, when the change occurs you can feel the resistance in the lever. It doesn't happen on any particular gear its just random, sometimes it changes sometimes it doesn't.

I was thinking of just replacing the shift cables, or do I have a bigger issue with my shifters ????

Thanks
Great Jens Voigt Quotes:
"I get paid to hurt other people, how good is that?"
"Shut up legs"
User avatar
Trev Campbell
 
Posts: 140
Joined: Wed Dec 10, 2008 9:12 pm
Location: Strathalbyn, SA

by BNA » Fri Jul 18, 2014 1:06 pm

BNA
 

Re: Shifter Slipping

Postby Dragster1 » Fri Jul 18, 2014 1:06 pm

If your cables are old I would start there but its common that the brifters gum up and need to be pulled apart and cleaned. There are a lot of posts in the sticky section on how to clean them big job though if you haven't done them before.
User avatar
Dragster1
 
Posts: 983
Joined: Mon Jul 08, 2013 9:46 pm
Location: Eluding motorist in Brisbane

Re: Shifter Slipping

Postby bychosis » Fri Jul 18, 2014 1:40 pm

+1 for new cables, plus clean, lube and adjust the shifters where possible.
bychosis (bahy-koh-sis): A mental disorder of delusions indicating impaired contact with a reality of no bicycles.
User avatar
bychosis
 
Posts: 2279
Joined: Sat Jan 14, 2012 12:10 pm
Location: Lake Macquarie

Re: Shifter Slipping

Postby Trev Campbell » Fri Jul 18, 2014 2:14 pm

Thanks Guys, I'll give it a go.

Cheers
Great Jens Voigt Quotes:
"I get paid to hurt other people, how good is that?"
"Shut up legs"
User avatar
Trev Campbell
 
Posts: 140
Joined: Wed Dec 10, 2008 9:12 pm
Location: Strathalbyn, SA

Re: Shifter Slipping

Postby Tim » Fri Jul 18, 2014 3:58 pm

I wouldn't fiddle with the brifter internals unless you are especially mechanically talented.
The best fix I've read of is to just squirt large volumes of WD40 into the workings.
Hopefully this will flush out any gunk and re-lube the moving parts.
From memory there was a particular model of 105 shifter that had known and common issues.
User avatar
Tim
 
Posts: 859
Joined: Wed Jul 07, 2010 5:02 pm
Location: Gippsland Lakes

Re: Shifter Slipping

Postby Dragster1 » Fri Jul 18, 2014 4:10 pm

Tim wrote:I wouldn't fiddle with the brifter internals unless you are especially mechanically talented.
The best fix I've read of is to just squirt large volumes of WD40 into the workings.
Hopefully this will flush out any gunk and re-lube the moving parts.
From memory there was a particular model of 105 shifter that had known and common issues.

ha ha yeah! the small parts can be pure mongrels to get back in. I once though I would try some liquid spray grease in there" Big Mistake", its stoped the rachet from working correctly. Silicon spray I have found to work for me and keeps every thing from gumming up and cleans any gunk out.
User avatar
Dragster1
 
Posts: 983
Joined: Mon Jul 08, 2013 9:46 pm
Location: Eluding motorist in Brisbane

Re: Shifter Slipping

Postby Duck! » Fri Jul 18, 2014 8:06 pm

Very common for the older shifters (all types, road and MTB) to do that. The grease on the ratchety bits dries out & goes all cheesy, stopping the pawls from springing back into the next notch as quickly as they should. Do NOT try to pull them araprt, it will only end in tears! As others have mentioned, spray copious volumes of any sort of light lubricant in there & work the shifter back & forward until the guts start working again.
I had a thought, but it got run over as it crossed my mind.
Duck!
Expert
 
Posts: 1865
Joined: Tue May 21, 2013 8:21 pm
Location: On The Tools

Re: Shifter Slipping

Postby Wingnut » Sat Jul 19, 2014 11:55 am

Maybe it just doesn't like being called a "Brifter"... ;)
"It never gets easier, you just go faster..." - Greg Lemond

"Because technology alone is a poor substitute for experience." - Richard Sachs
User avatar
Wingnut
 
Posts: 462
Joined: Sat Sep 05, 2009 11:01 pm
Location: Mornington Peninsula...

Re: Shifter Slipping

Postby rogerrabbit » Mon Jul 21, 2014 10:05 pm

Two theories. If you are contacting the rear paddle at all while you shift the brake lever, it doesn't engage. Are you now wearing full gloves since it is cold, you may be doing this. I had new DA shifters doing this and it took me a while to figure it out.


Secondly, if the shifters are sticky inside; I soaked a 20 year old 1991 tri-colour set in petrol for an hour, dried them out and lubed with spray on lithium grease. No more problems.
rogerrabbit
 
Posts: 1116
Joined: Sat Mar 08, 2008 9:12 pm
Location: Seaforth

Re: Shifter Slipping

Postby Trev Campbell » Tue Jul 29, 2014 11:49 am

Thanks Guys, New Cables and a big dose of silicon spray appear to have done the trick.
Great Jens Voigt Quotes:
"I get paid to hurt other people, how good is that?"
"Shut up legs"
User avatar
Trev Campbell
 
Posts: 140
Joined: Wed Dec 10, 2008 9:12 pm
Location: Strathalbyn, SA


Return to The Shed

Who is online

Users browsing this forum: No registered users



Popular Bike Shops
Torpedo 7 Torpedo7 AU
Ground Effect Ground Effect NZ
Chain Reaction Cycles CRC UK
Wiggle Wiggle UK
Ebay Ebay AU

“Bicycles BNA Twitter
“Bicycles BNA Facebook
“Google+ BNA Google+
“Bicycles BNA Newsletter

> FREE BNA Stickers
> BNA Cycling Kit