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

Reply
 
Thread Tools Search this Thread
Old 06-13-10, 11:16 PM   #1
Mike734
Member
Thread Starter
 
Join Date: May 2010
Location: Seattle area
Bikes: Scatante Team DA
Posts: 27
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think I broke my shifter?

Struggling up a hill the other day I tried one time too many to shift in to a lower gear. (I was already in the 34-23 gear) I pushed a little too hard on the shifter and SNAP, something inside the shifter broke and I could only shift to a smaller cog not back up to easier gears. I was surprised how easily it broke. Fortunately the bike is new and the shop replaced the DA 7900 shifter free.

I'm wondering if the shifter was defective or was I just a clumsy oaf and use too much force? I would think there should be a clutch of some sort that would give way if the derailleur was at its limit. I'm afraid it may happen again.
Mike734 is offline   Reply With Quote
Old 06-14-10, 07:00 AM   #2
Chris_W
Gear Combo Guru
 
Chris_W's Avatar
 
Join Date: May 2007
Location: Switzerland
Bikes: Spec' Tarmac (road), Ridley Fenix (commuter & fast tourer), Salsa Mamasita (MTB), CoMo Speedster (tandem), Surly Big Dummy (cargo), Airnimal (folder)
Posts: 2,241
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Maybe the size of your cassette is the problem! Get some lower gears and you won't bottom out so often. I like the gearing combination offered on the 12-28 10-speed cassette made by IRD and BBB (Shimano and SRAM compatible).
Chris_W is offline   Reply With Quote
Old 06-14-10, 08:56 AM   #3
Mike734
Member
Thread Starter
 
Join Date: May 2010
Location: Seattle area
Bikes: Scatante Team DA
Posts: 27
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Chris_W View Post
Maybe the size of your cassette is the problem! Get some lower gears and you won't bottom out so often. I like the gearing combination offered on the 12-28 10-speed cassette made by IRD and BBB (Shimano and SRAM compatible).
Well more likely it is the size of my gut that is the problem. Actually, I have looked in to another cassette and will probably go to a 11-26 soon. Still I just did a fairly challenging (hilly) century with little problem. I guess I'm getting in to shape after all.

Now back to the original question. Shouldn't a shifter have a breakaway clutch to save the internal mechanisms of a shifter instead of just breaking?
Mike734 is offline   Reply With Quote
Old 06-14-10, 09:15 AM   #4
AndrewP
Senior Member
 
Join Date: Sep 2001
Location: Montreal
Bikes: Peugeot Hybrid, Minelli Hybrid
Posts: 6,521
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Your fingers now know what it feels like to push against the limit screw. You wont do it again. The old friction shifters had about 10 pieces in them, STIs have about 100 pieces. No need to add another 20 parts that dont improve functionality.

Last edited by AndrewP; 06-14-10 at 09:20 AM.
AndrewP is offline   Reply With Quote
Reply


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 10:50 AM.