Which rear XT mech???

Unknown · May 2007

I'm in the stages of converting from 8 to 9 speed, so I've changed the crack(m760), cassette(m760), chain(hg93) and rapidfire changers(m750)but I have zero idea on which rear mech to get. Short? long? top rise? low rise? rapid rise? I have no idea which will work!!!

help!

thanks

Mad Splasherwmb · May 2007

M761 and assuming you want to use 3 chain-rings and an MTB cassette, long cage.

George
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Plain-Lazy · May 2007

If your still debating between rapid rise and low rise, the rapid rise will mean that 1 full push on the thumb shifter, on the rapidfire pod will change multiple sprockets down (largest to smallest) and the low rise will mean that the thumb leaver enables you to change up multiple sprockets with 1 push. Obviously it means that the low rise will be quicker to change to an eaiser gear, which is better for unexpected climbs, and the rapidrise the same the other way, better for going downhill.

Which means that it is personal choice about which one you want.

Tom

Unknown · May 2007

Hmmmmm thanks for explaining. This means that I currently have low rise.(which I like)

Mad Splasherwmb · May 2007

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Discopooh

Hmmmmm thanks for explaining. This means that I currently have low rise.(which I like)

<hr height="1" noshade id="quote"></blockquote id="quote">

Like I say, M761. M760 is rapid rise.

George
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RSMarcowmb · May 2007

Without sounding thick or anything, what is the difference between the M numbers (M750, M760 etc)..?

If you can buy a long cage rear mech either one of the M numbers, what does this mean.

Cheers

Mark

Unknown · May 2007

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Mad Splasher

Like I say, M761. M760 is rapid rise.

<hr height="1" noshade id="quote"></blockquote id="quote">

That is it, the first digit indicates range xt/lx/deore/xtr etc and the middle one is sort of year, but isn't in synch!

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Unknown · May 2007

As far as i can tell, 750 is '06 and 760 is 07. I think?????

Mad Splasherwmb · May 2007

If my memory serves me right, M750 was 1999, M760 was 2004 (after 2003 XTR was launched) and M761 stuff is part of a refresh to put a conventional top-normal mech and rapid-fire shifters back into the range. The M760 stuff is still current but the whole thing looks likely to be replaced by next years 2008 XT (presumably M770).

George
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Unknown · May 2007

This is getting confusing.

seems m750 98/99 looking at this spec.

http://techdocs.shimano.com/media/techd ... 611911.pdf

Yet my crank is '07(m760), so when is m761 dated from ?????

Why cann't they make it simple. I have a very simple brain

Mad Splasherwmb · May 2007

Sorry if my previous post didn't make sense. To the best of my knowledge, the dates are

m750 1999
m760 2004
m761 2007 (but not a new group, just a couple of add-ons)

George
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Unknown · May 2007

arrrrr its o so clear now.

?lol

Unknown · June 2007

So is the M750 rear mech a rapid rise or normal or available in either ?

If it available in either, without fitting it how do you know which one you've got ?

Should a short cage M750 work ok with a 9 speed/twin ring set up ?

Mad Splasherwmb · June 2007

It's a long time ago but I'm sure M750 was conventional. If you've got one and you're trying to work out which it is that's easier. If you release the cable, does it go to the smallest cog (conventional) or the biggest cog (rapid rise).

As for short cage, using Shimano's terms, I don't think you can get an MTB mech in short cage, only long or medium. Medium should be fine with 2 rings (32/22) and 9 at the back. A short cage road mech would probably be a touch tight albeit fine if you went to a single ring set-up.

George
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Unknown · June 2007

dont need to change rear mech. 8spd rear mechs are 9spd compatible, and if you do buy a rear mech get an Ultegra 6600 short cage rear mech (not super short), they look bling, weigh nothing (217g) have a stronger spring than XT and cost about the same, the short ultegra is a similar length to a normal mtb mech so dont be put off by the name. Ive been using road rear mechs for ages now and they are better value than the mtb ones, they are lighter, cheaper and look better.

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Which rear XT mech???

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