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Old 04-10-13, 01:52 PM   #1
mainstreetexile
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Best mounting angle for top-mount thumb shifters?

This applies to vintage mtbs in particular, but is relevant for any bike with upright bars and top-mounted thumb shifters:

Can people post pictures showing how their thumb shifters are mounted, showing their angles (how far forward or backward they are rotated)?

It's been kind of tricky in the past to find an angle that works well for me ergonomically, so I figured I would query the combined experience of the C&V hive mind.

Bonus points for suntour thumbies, since that's what I'm currently trying to get set up:



http://velobase.com/ViewComponent.as...8-6DBCA8CDAD36
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Old 04-10-13, 02:25 PM   #2
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I always angle them forward a little bit so that I can shift to a higher gear using the side of my pointer finger without removing the rest of my hand from the grip.
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Old 04-10-13, 02:33 PM   #3
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Thanks, I'll try that.

Also, if anyone is using the suntour thumbies: there are three mount settings that fix the left/right rotation. Is the center one usually the best option?
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Old 04-10-13, 02:36 PM   #4
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Mount them so you can easly move them with your hands as said above. Everyone sets their bike up to meet their needs/comfort. It is not something that someone can tell you is right or wrong. Put them on the bar just slightly loose and then move them around as you ride until you find the sweet spot. Then tighten the clamp. If one side is at a different angle than the other so be it. Roger
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Old 04-10-13, 03:27 PM   #5
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There is no correct way. Find the position that works for you.
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Old 04-10-13, 05:46 PM   #6
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There is no correct way. Find the position that works for you.
Maybe I should have phrased it differently. I'm curious in seeing (or hearing about) what works for other people.
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Old 04-10-13, 06:10 PM   #7
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I start with mine with the axle of the shifter perpendicular to the plane of the levers. Ill adjust from there to make sure I can get a full shifter throw without hitting the lever body.

E: after looking at the bikes in my sig, I guess I don't think about it enough. I set them perpendicular to the ground and usually end up chanting them just a bit forward.
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Old 04-11-13, 11:50 PM   #8
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Quote:
Originally Posted by mparker326 View Post
I always angle them forward a little bit so that I can shift to a higher gear using the side of my pointer finger without removing the rest of my hand from the grip.
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Originally Posted by IthaDan View Post
I start with mine with the axle of the shifter perpendicular to the plane of the levers. Ill adjust from there to make sure I can get a full shifter throw without hitting the lever body.

E: after looking at the bikes in my sig, I guess I don't think about it enough. I set them perpendicular to the ground and usually end up chanting them just a bit forward.
On a recent 85 rockhopper I picked up, they came tilted back in the opposite direction quite a bit and it felt very awkward shifting them like that. I tilted them forward a bit from level and took it out for a ride on some nearby trails yesterday and it seemed to work great.

Thanks for the advice. Adjusting the angle on the suntour thumbies is a little more of a pain since you have to pop the actual shifter off and then use a socket to loosen the mount, so it was nice to have a good starting point for testing.
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Old 04-12-13, 12:06 AM   #9
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+1 to angled a little bit forward. I find that it requires less effort to push forward with your thumb than pull back with your finger. With a slight forward angle, it's easier on my finger without compromising my thumb. I find my fingers are usually resting on the brake lever, so the closer I get the shift lever to the brake lever the better. The ones pictured below are almost touching the brake lever. I'm sure some would/will say these are angled too far forward. As GrandBois says, to each his/her own. Do what feels right.



(Please forgive the unicrown. )

Last edited by gaucho777; 04-12-13 at 12:13 AM.
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