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Shimano A350 Index only shifter to friction

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Shimano A350 Index only shifter to friction

Old 09-20-11, 10:34 AM
  #1  
20grit
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Shimano A350 Index only shifter to friction

I'm at work, so no pictures yet. If the thread draws interest, I'll snap some when I get home.

I've been pondering a triple conversion on my peugeot which is outfitted with Exage level components. The shifters both have outer housings that list index and friction. The rear derailleur can be turned to friction mode via the ring on the outside. The front shifter does not have the ring or the accompanying interior device to change into friction mode. It is index only. It seems they just used a pre-made housing.

I don't think the indexing mode is going to work with the triple, at all. It might but I'm having my doubts. I haven't mocked it up because I'm missing the crank bolts for the cranks.

If I open this shifter up, is there a way to take it out of indexing mode?

I'm not buying new shifters. Before I do that, I'll just go ahead and put on the entire 105 group I have on hand.
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Old 09-20-11, 05:06 PM
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Originally Posted by 20grit View Post

The front shifter does not have the ring or the accompanying interior device to change into friction mode. It is index only.
Just the opposite. It is friction only, and will swing a triple just fine.

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Old 09-20-11, 05:22 PM
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No, no, no... It's index only. Trust me on this. There's absolutely no trimming on this shifter.

https://sheldonbrown.com/shimano.html

A bit down the page Sheldon mentions it. The group was one of the first to feature front indexing. It won't go into friction mode on the front. The rear will.
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Old 09-20-11, 05:50 PM
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I'm looking at an exploded diagram of the shifter. Between the fixing bolt and the plastic cap on the lever is a part Shimano calls the Front SIS Ring. It appears that it comes out and is replaceable. From the diagram it appears to be notched both inside and out so this may be moot but, maybe if you replace that notched ring with a washer(s) you might get friction. Doesn't look like it's possible but.........
It does say the front is index only, but you knew that.
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Old 09-20-11, 10:31 PM
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My wife's bike has the same shifters and I tried taking the front shifter apart to try convert to friction but wasn't able to make it work, ended up using 105 shifters.
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Old 09-21-11, 05:05 AM
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Originally Posted by MalcolmsFrejus View Post
It does say the front is index only, but you knew that.
I didn't. Learn something new every day.

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Old 09-21-11, 06:19 AM
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Hmmmm not seeming too promising.
Looks like I might be looking for a wheelset and putting the whole 105 STI group on.
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Old 10-14-14, 07:13 AM
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I'm reviving this old thread since I was faced with a similar issue. The plastic cap on the shifter indicated some SIS/friction toggle but it wasn't obvious how to change the mode. Seeing post #4 I removed what I thing is the "SIS ring" (a metal splined ring between the body and a toothed washer), and the shifter now operates in friction mode.
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