Strange xtr m900 question

[Tootyred]

Having never owned anything as modern as " combi " brake / shifters, i have a question.

The perch on the back of m900 levers, has a similar hole configuration to thumb shifters...ie 4 holes. Im only going from pictures.

Do thumbshifters fit on? All be they upside down? ( wow, that takes me back to a confusing period 30 years ago) Or are the holes differing distances apart?

Purely an academic question.

 

[legrandefromage]

You think brake/ shifter combo is 'modern'? Its 30 years plus!

Mountain LX had levers and thumbshifters (Exage Country/ trail too but was 6spd) and Exage Mountain

Suntour did a combined shifter/ brake and so did Sachs

XTR / XT/ DX all used the same lever mount in their last DX/ XT M735 incarnation with different finish (matt for DX/ XT and grey for the XTR) - there is an earlier XT/ DX 'push/push' style lever too pre XTR Rapidfire

The lever mount itself could be modified with a bit of spacing and strategically placed holes to fit a thumby but then you also need the cable stop/ adjuster

Its a lot of faff!

The Mountain LX combo uses a different mount to the DX XT thumbshifter (there are also 200GS and some far rarer midrange thumbies) but is reasonable despite the levers being resin

 

[legrandefromage]

 

[legrandefromage]

 

[Tootyred]

Re:

So the 4 pin holes on the back of 900 xtr mount are different spacing to the pins on, say, m732 xt thumbies?

Im aware of combination shifters, just never had a set. Mainly as i never rated xt thumbies, having gone over to xc pro and never looked back, and always mixed and matched these with differing brake levers ( xc pro, ritchey or m733s).

As i said its only a theoretical question, as from images, the holes / pins look similar, but without scale / interface / interruption info into hard to tell.

Thanks for the reply btw.

 

[Disco Drive]

One of the pins on M900 is offset whereas the XT are equally spaced. Typical Shimano pissing about with kit so it can’t be interchangeable..