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.
Gear Combo Guru
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.
Originally Posted by Chris_W
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?
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.