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 Post subject: road mechs for mtb's
PostPosted: Sun Feb 04, 2007 10:18 am 
Retro Guru

Joined: Fri Aug 26, 2005 9:41 am
Posts: 1217
Location: bedfordshire
getting tired of looking for a smart xtr900 rear mech, Q. has anyone done a dura ace rear mech fitment before? would like it to work, but as for a garage queen build, out and out performance not really an issue. cheers al.


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 Post subject:
PostPosted: Sun Feb 04, 2007 11:01 am 
retrobike rider
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Joined: Fri Oct 28, 2005 1:10 am
Posts: 4471
Location: Bristol
Not a problem but you'll need to go for the longest mech and closest cassette ratio possible to not kill it. Otherwise, like XTR, it's an immortal mech ( that needs new jockey wheels annually! :lol: ).


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 Post subject:
PostPosted: Sun Feb 04, 2007 11:52 am 
Old School Hero
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Joined: Sat Dec 16, 2006 11:24 pm
Posts: 191
Location: Netherlands
In downhill and 4x every other rider has a racederailleur mounted.
In these sports you want a shortcage and I think it started out as
race mech being a cheap alternative (MTB shortcages only available
in high end models) and they come slightly shorter than XTR.
But now many ride around with dura-ace so think it has become a
cult now, mounting a race mech.
First question on a Freeride forum when SRAM force and rival came
out was whether they would work with the X.O X9 X7 shifters. even
though the X9 short has the same lenght. (btw: answer = no)

I keep riding with a 11-30 cassette and a medium or short cage MTB
mech though, a race cassette is to tight for me.

oh but as a response :oops: Yes no problem


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 Post subject:
PostPosted: Sun Feb 04, 2007 2:02 pm 
BoTM Winner
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Joined: Sun Oct 23, 2005 7:22 pm
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Location: Wooster, Ohio
Alan,

A very trick build that I like to use is the Mavic Road derailleur...totally rebuildable, parts still available, and a chic black and silver that goes well with any part spec.

They can be found relatively inexpensive on Ebay as well...

cheers,

rody


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 Post subject:
PostPosted: Sun Feb 04, 2007 3:17 pm 
Gold Trader
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Joined: Sat Jul 29, 2006 11:14 pm
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Location: Somerset
Careful with cable pull, pre 1991 Dura Ace used a slightly different mech spacing / cable pull. Other than that road mech's work fine :D


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 Post subject:
PostPosted: Sun Feb 04, 2007 3:46 pm 
Retro Guru
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Location: USA, sigh...
i'm using an old ultegra (6400...8spd?) with a 11-28 cassette and it works wonderfully. front is fixed 36t.


Last edited by dookie on Tue Feb 06, 2007 1:27 am, edited 2 times in total.

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 Post subject:
PostPosted: Sun Feb 04, 2007 8:23 pm 
Retro Guru

Joined: Fri Aug 26, 2005 9:41 am
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Location: bedfordshire
good replies cheers, al


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 Post subject:
PostPosted: Sun Feb 04, 2007 9:14 pm 
Retro Guru

Joined: Fri Apr 28, 2006 8:42 pm
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Location: Brighton
My retro bike runs a 6-speed Ultegra mech - I use this with a 12-24 cassette and 28-38-46 rings. Not many low gears but my theory was that for racing if you needed a lower gear you'd be better off running with the bike.

I also "made" a hybrid - XT mech with Ultegra cage - looks great, works great.


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 Post subject: Re: road mechs for mtb's
PostPosted: Sun Feb 04, 2007 10:31 pm 
Old School Grand Master
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Joined: Sat May 20, 2006 2:56 pm
Posts: 4776
Location: No brakes? Way to commit soldier.
ti-fat-man wrote:
getting tired of looking for a smart xtr900 rear mech, Q. has anyone done a dura ace rear mech fitment before? would like it to work, but as for a garage queen build, out and out performance not really an issue. cheers al.


I have just bought a Dura Ace (RD-7402) rear mech to slap on the Zaskar and I'm planning on doing the conversion some time this week. In theory the Dura Ace rear mech can only handle a 26t max rear sprocket whereas Ultegra and others could cope with a 28t.I'm currently running 11-28 on the back and 24-36-42 on the front but I will be changing this about to give the mech a fighting chance!

I'll let you know how it goes.


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 Post subject:
PostPosted: Sun Feb 04, 2007 11:00 pm 
Mr Darcy
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Joined: Wed Oct 26, 2005 8:36 pm
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Location: Bicester
road mechs work fine!!

As I said in Russels thread, used to use 105 all the time for racing as they were cheap, fast and light :D Just be more careful with which gears you use and chain length.

Though I did succomb to M900 pimp factor after a while :oops:


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