Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  

Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Thread Tools Search this Thread
Old 08-04-12, 09:55 AM   #1
Junior Member
Thread Starter
ViolinRdr's Avatar
Join Date: Jul 2011
Posts: 15
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Shimano 105 rear Shifter Problem...PLEASE HELP!

OK, first off i was riding thursday, CAAD 8 was doing great, shifting fine, everything I wanted it to do it did. On the return however, the bike would shift up to a harder gear but to a certain point, when, with about three gears left, the shift lever became "loose". By that, i mean it didn't have the click to shift the chain to a harder gear. I could force it by pulling on the cable and then letting it drop however.

Yesterday after work, I decided to take a look at it, pulled the rubber on the hood up, and noticed that the cable was frayed inside the hood. Obviously not good.

This morning, back at work (local bike shop, however I'm new), we pulled the shifter off the bike and took a real in depth look at it, and REALLY struggled getting the cable out. Eventually we did get it out, and initially the shifter indexed without the cable. However, when we put everything back on the bike, the shifter wouldn't index. We're afraid something may have popped loose in either pulling the cable out, or the reapplication of the shifter and the cable itself. If ANYONE has ever seen a problem like this, PLEASE put anything down that may help!!! I'm bikeless right now, and there's a good hilly 60 miler tomorrow i'm considering doing, if allowed.

My mechanic at the shop said that 105's aren't meant to be rebuilt...if that's the case I'll have to shuck out 108 dollars to get a new one that doesn't even match.
ViolinRdr is offline   Reply With Quote
Old 08-04-12, 10:33 AM   #2
Senior Member
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 35,306
Mentioned: 105 Post(s)
Tagged: 1 Thread(s)
Quoted: 3649 Post(s)
105s aren't intended for rebuilding, but all may not be lost. Possibly something is simply out of position or jammed.

Try threading a new cable but not attaching the other end. Then with gentle tension on the cable try working the lever in either or both directions and see of you can get something to give. You might also douse it in light lube as a hail Mary.

BTW- while they aren't intended to be rebuilt, I believe there are shops that are successful doing that, so even if yours seems dead, it might be saved for some dough, so at least you'll still have a matched set.
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 08-04-12, 10:38 AM   #3
Senior Member
mechBgon's Avatar
Join Date: Jul 2002
Posts: 6,957
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Easy thing first. Confirm that the head of the cable is actually in the "socket" of the part that rotates when you shift. If it was rotated down out of sight when the new cable was installed, you may have simply bypassed it when threading the cable through the shifter, and when that part rotated back up, it might've met the cable head in its path and gotten stuck in no-man's land.

Also, try holding the main lever blade and applying a bit of pressure in the outboard direction. If you manually pull it outboard, then push inwards, do you get clicks now? I've seen levers that have taken some damage and no longer cock for the next shift by themselves, they're inhibited from reaching their normal resting position.

There's also the possibility that some frayed strands are in your shifter's innards.
mechBgon is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -6. The time now is 05:42 AM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    get answers from real people!
Click to start entering your question.