xt derailleur and 48 tooth chainring

I think shimano states a xt front derailleur can handle a maximum of 22 teeth difference between
chainrings (44-32-22). But could it handle a 26 teeth difference (48-36-22)?

 

gerrit van wijk wrote:
> I think shimano states a xt front derailleur can handle a maximum of 22 teeth difference between
> chainrings (44-32-22). But could it handle a 26 teeth difference (48-36-22)?
>
>
>

Don't know if this helps, but I'm running 44-32-20 which is a 24 tooth difference -- XTR DR. Getting
the DR adjusted so that it'll down and upshift between the 20 and the 32 is about a 1/4 turn
tolerance.

David

 

"gerrit van wijk" <[email protected]> wrote in message
news:[email protected]...
| I think shimano states a xt front derailleur can handle a maximum of 22 teeth difference between
| chainrings (44-32-22). But could it handle a 26 teeth difference (48-36-22)?

Top swing (new style) no (well, maybe)

Bottom Swing (old style) yes

---
__o _`\(,_ Cycling is life, (_)/ (_) all the rest, just details. Nelson Binch =^o.o^=
http://intergalax.com

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"Nelson Binch" <[email protected]> wrote in message
news:[email protected]...
> "gerrit van wijk" <[email protected]> wrote in message
> news:[email protected]...
> | I think shimano states a xt front derailleur can handle a maximum of 22 teeth difference between
> | chainrings (44-32-22). But could it handle a 26 teeth difference (48-36-22)?
>
> Top swing (new style) no (well, maybe)
>
> Bottom Swing (old style) yes

I really need someone to explain what the point of topswing mechs is, asides the fact that they fit
to certain sussers when traditional ones don't. They look crap, and break a lot. Oh and then there's
the rattling.

Andy Chequer

 

"Andy Chequer" <[email protected](youdontwantthisbitinit)thisisasparagus.com> wrote in message
news:GJ%[email protected]...
|
| "Nelson Binch" <[email protected]> wrote in message
| news:[email protected]...
| > "gerrit van wijk" <[email protected]> wrote in message
| > news:[email protected]...
| > | I think shimano states a xt front derailleur can handle a maximum of
22
| > | teeth difference between chainrings (44-32-22). But could it handle a 26 teeth difference
| > | (48-36-22)?
| >
| > Top swing (new style) no (well, maybe)
| >
| > Bottom Swing (old style) yes
|
| I really need someone to explain what the point of topswing mechs is,
asides
| the fact that they fit to certain sussers when traditional ones don't.
They
| look crap, and break a lot. Oh and then there's the rattling.

I've never seen any technical data from Shimano about it, but when it comes to small chainring
setups (compact drive) the top swing derailleurs seem to work better. I suppose it is in the way the
cage arcs.

Bike companies seem to like using the top-swing style unless they absolutely can't (as on the Gary
Fisher Sugars) Apparently Shimano produces the things
10:1 against bottom swing.

Consider my fleet - Prodigy; XT BSTP Rockhopper; XT BSBP Cruiser; XT BSBP High Sierra; DX BSBP
Cadex; XT BSBP Ground Control; XT TSTP Big Sur; LX TSTP

The last two only have top pulls because I got them for chump change on Ebay.

---
__o _`\(,_ Cycling is life, (_)/ (_) all the rest, just details. Nelson Binch =^o.o^=
http://intergalax.com

Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.471 / Virus Database: 269 -
Release Date: 4/10/2003

 

Andy Chequer wrote:

> "Nelson Binch" <[email protected]> wrote in message
> news:[email protected]...
>
>>"gerrit van wijk" <[email protected]> wrote in message
>>news:[email protected]...
>>| I think shimano states a xt front derailleur can handle a maximum of 22 teeth difference between
>>| chainrings (44-32-22). But could it handle a 26 teeth difference (48-36-22)?
>>
>>Top swing (new style) no (well, maybe)
>>
>>Bottom Swing (old style) yes
>
>
> I really need someone to explain what the point of topswing mechs is, asides the fact that they
> fit to certain sussers when traditional ones don't. They look crap, and break a lot. Oh and then
> there's the rattling.
>
> Andy Chequer
>
>

i'm tring to remember just what the spin was on the difference. seems to me that it was the
difference in the way the cage moves. a topswing moves Up as it moves inward. that (in
combination with cage shape) was supposed to ease the chain off the bigger rings to aid in down
shifting under load.

 

In article <GJ%[email protected]>, "Andy Chequer"
<[email protected](youdontwantthisbitinit)thisisasparagus.com> says...
>
> "Nelson Binch" <[email protected]> wrote in message
> news:[email protected]...
> > "gerrit van wijk" <[email protected]> wrote in message
> > news:[email protected]...
> > | I think shimano states a xt front derailleur can handle a maximum of 22 teeth difference
> > | between chainrings (44-32-22). But could it handle a 26 teeth difference (48-36-22)?
> >
> > Top swing (new style) no (well, maybe)
> >
> > Bottom Swing (old style) yes
>
> I really need someone to explain what the point of topswing mechs is, asides the fact that they
> fit to certain sussers when traditional ones don't. They look crap, and break a lot. Oh and then
> there's the rattling.
>
> Andy Chequer
>
>
>

Maybe you haven't seen the Shimano marketing department's mantra yet; "Replacement! Replacement!
Replacement!"
--
_________________________
Chris Phillipo - Cape Breton, Nova Scotia http://www.ramsays-online.com