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PostPosted: Mon Jan 08, 2018 12:34 pm 
Retro Guru

Joined: Sun Apr 25, 2010 10:07 pm
Posts: 1634
I have an M951 8 speed rapid rise rear mech and thinking of teaming it with a set of M732 thumbies.Anyone using this set up?


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PostPosted: Mon Jan 08, 2018 1:10 pm 
Gold Trader / MacRetro rider
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Location: Sunny Glasgow
Unlikely I reckon :lol:

Possible the spring would pull against the friction of the thumbie causing it to slip :?, so maybe only on indexed


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 Post subject: Re:
PostPosted: Mon Jan 08, 2018 1:51 pm 
Retro Guru

Joined: Sun Apr 25, 2010 10:07 pm
Posts: 1634
Yup,I know friction wouldnt be an option due to the pull of the mech but Im a fan of rapid rise and heard of guys using Microshift thumbies with them and I`d imagine it could be a pretty solid set up with XT thumbs.


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PostPosted: Wed Jan 10, 2018 12:26 am 
Old School Hero

Joined: Wed Nov 12, 2008 10:52 pm
Posts: 189
Location: manchester uk
Correct me if I'm wrong but doesn't the rapid rise have the same spring tension as a normal mech. I thought they were essentially the same just working in reverse. If so there's no reason it wouldn't work


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 Post subject: Re:
PostPosted: Thu Jan 11, 2018 3:00 pm 
Dirt Disciple

Joined: Fri Mar 17, 2017 2:01 pm
Posts: 44
Numbers on the shifter will be in reverse but otherwise it should work fine.

There are springs in both top normal and bottom normal mechs and while there may be slight differences in the power of those springs id doubt it’d be enough to overpower the shifter.

Fwiw though, I’d not touch Microshift thumbies with a barge pole. I had one of their bar end shifters (same thing as a thumbie really) on a bike with an Alfine hub and the indexing on the shifter was miles out.


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 Post subject: Re:
PostPosted: Mon Jan 15, 2018 8:53 pm 
Retro Guru

Joined: Tue Sep 01, 2009 12:28 pm
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Location: Almeria, Spain
I stand to be corrected but I believe that rapid rise only came in 9 speed. In the past I have run a RR rear mech with XT 3 X 9 shifters with no problems (once that I got used the "reverse" shifting).


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 Post subject: Re: Re:
PostPosted: Mon Jan 15, 2018 9:42 pm 
Retro Guru

Joined: Sun Apr 25, 2010 10:07 pm
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shedobits wrote:
I stand to be corrected but I believe that rapid rise only came in 9 speed. In the past I have run a RR rear mech with XT 3 X 9 shifters with no problems (once that I got used the "reverse" shifting).

First gen XTR M951 rapid rise was 8 speed.


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PostPosted: Mon Jan 15, 2018 11:30 pm 
Old School Grand Master
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Joined: Wed Feb 20, 2008 12:21 pm
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Location: Lost in Translation
66 triumph daytona wrote:
I have an M951 8 speed rapid rise rear mech and thinking of teaming it with a set of M732 thumbies. Anyone using this set up?

Yep. Works fine, indexed or friction.

I'm also using an M951 mech with Forge/Dura Ace 9-speed thumbies, and that works fine as well.


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PostPosted: Tue Jan 16, 2018 10:43 am 
Retro Guru

Joined: Sun Apr 25, 2010 10:07 pm
Posts: 1634
one-eyed_jim wrote:
66 triumph daytona wrote:
I have an M951 8 speed rapid rise rear mech and thinking of teaming it with a set of M732 thumbies. Anyone using this set up?

Yep. Works fine, indexed or friction.


I'm also using an M951 mech with Forge/Dura Ace 9-speed thumbies, and that works fine as well.

Thats great.Must stick an ad up.


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PostPosted: Sun Jan 21, 2018 6:12 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8847
Location: New Forest, UK
Second that it works fine. It is more logical and I used it with bar-end shifters so that I didn't bash my knees in bottom gear.


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