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Stiff left shift lever

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Stiff left shift lever

Old 04-27-14, 05:55 AM
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Stiff left shift lever

My Scott speedster has a Shimano Claris ST-R243-L left lever, and a Shimano Claris FD 2403 front delailleur. The shift operation is very stiff when going from small to middle chain ring, and a little less stiff when going from the middle to the large ring, but still unacceptable.
The shifter is new, the cable is mounted properly on the inner side to maximize the leverage, the front derailleur is new, clean, well oiled, and the shifter wire has normal drag.
I cannot determine exactly whether this stiffness is due to the shifter or the front derailleur. However, when I pull the shifter wire along the down tube I feel much more resistance than on my mountain bike or trekking bikes.

Any recommendations for solve the problem as appreciated.
YannisG
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Old 04-27-14, 10:35 AM
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Try to separate out the system's parts, the cable, the der and the shifter. Disconnect the cable from the der. Move the der by hand, compare this force with other bikes (and you don't need to detach the cable to do this). Der should move both ways with ease, only the spring's force in the outward direction. Pull the cable casing out of the shifter port an inch or two. Now holding the cable at each end pull it back and forth. Check the portion that touches the BB guide for rust or grime. Holding the cable as it exits the shifter run through the shifter's range of lever motions. How does the shifter feel?

Your comment about feeling much more resistance as the cable is pulled mid way along the DT suggests the der or cable is the cause. But, again, compare to other bikes with similar cable routing and systems to get a better feel for what is normal and what is indicative of a problem.

You don't list a location. Can you bring the bike to a LBS for their assessment? Andy.
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Old 04-27-14, 11:53 AM
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Thanks for yr reply.
I have a bike with a similar cable routing. When pulling the FD wire I feel much less resistance than from the Scott. The area under the BB is completely clean. So I feel that the problem is most like from the FD.
Location is Rion Greece. There is a LBS, but our experience is similar.
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Old 04-27-14, 12:16 PM
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the more common availability of a die drawn slick surface cable, is an improvement over the same sort of cable ,

not drawn through a round die and flattening the outside wires ..
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Old 04-27-14, 12:45 PM
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Thanks for yr response.
So you are saying that its the wire resistance that's the problem. However, moving the FD in and out by hand seems stiffer than usual, but this could be subjective.
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Old 04-27-14, 02:11 PM
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Originally Posted by yannisg
Thanks for yr response.
So you are saying that its the wire resistance that's the problem. However, moving the FD in and out by hand seems stiffer than usual, but this could be subjective.
YannisG
Yannis- Unsure if you're pulling the ft der by the cable when you state the above. Or are you using your fingers directly on the der's cage and cable anchoring arm to move the der? The difference is that using the cable (mid way along the DT) you are still having the cable's routing around the BB in play. By using your fingers directly against the der only the der's pivot friction will be felt. Andy.
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Old 04-28-14, 01:18 AM
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Thanks for the reply.
To avoid the influence of the wire around the BB I pulled the FD directly with my fingers, and I feel more resistance than with other similar FDs. I had though that this initial high resistance would decrease after using the bike a couple of times, but it remains the same. It is clean and oiled.
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