Bicycle Mechanics - 105 road deraileur for mtb

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.




View Full Version : 105 road deraileur for mtb


Maelstrom
07-02-04, 11:17 PM
I have heard of people running these. How well do they work. Will they work with a standard mtb shifter and cassette. I find xt stuff too long and can't find a short cage version anywhere. My front is 22/32 setup with 11x32 in the back. Any problems with this?


KleinMp99
07-02-04, 11:34 PM
I have heard of people running these. How well do they work. Will they work with a standard mtb shifter and cassette. I find xt stuff too long and can't find a short cage version anywhere. My front is 22/32 setup with 11x32 in the back. Any problems with this?


105 on a mountain bike? Man your one stupid ****er.

I think you need a road cassette with a road derailleur because their so short.....but I really dont know. I've always wanted to try road stuff but never got around to it.

Maelstrom
07-02-04, 11:35 PM
Feel the love...wohoo...;)


jeff williams
07-03-04, 12:17 AM
I dunno, my interest lies in road cogset..But, I've noticed a lack of custom or mod bike interest in BF. I asked a few more " Can this be done, yada?" No go.

Like it's only rocket science if YOU want to make it better.

Is there anything I can mail to get yur bike\s going? Derailler parts etc? You wrench?

>jef.

Maelstrom
07-03-04, 12:24 AM
If you read my thread in the mtb forums I ripped the hanger, cable and deraileur off my bike in 2 crashes.

I think I have a spare hanger but I will have to order some from the states (they are 60$ in whistler and 7$ in Seattle...dang Norco) I have just heard the 105 is crisper shifting and less slap (which I would love on the bighit) If you get hangers or whatever I will gladly send some coin. I do wrench almost my entire bike...

You have msn?

Al.canoe
07-03-04, 05:42 AM
I went the other way. I replaced a 105 on my wifes and my own touring road bikes to improve the shifting. Used XTR's. However the new-design XT on my mountain bike shifts just as well. The XTR's work fine with STI by the way.

Al

urban_assault
07-03-04, 06:36 AM
105 on a mountain bike? Man your one stupid ****er.

I think you need a road cassette with a road derailleur because their so short.....but I really dont know. I've always wanted to try road stuff but never got around to it.

Please Klein. A response can be given without the insults.

Retro Grouch
07-03-04, 07:04 AM
I have heard of people running these. How well do they work. Will they work with a standard mtb shifter and cassette. I find xt stuff too long and can't find a short cage version anywhere. My front is 22/32 setup with 11x32 in the back. Any problems with this?

I doubt it will work very well. The issue is interference between the upper derailleur pulley and the big cog. Shimano rates its road derailleurs for a maximum 27 tooth big cog. Guys sometimes cheat a little on that by dialing the b screw way in or even substituting a longer b screw, but 32 sounds to me like it might be pushing the envelope a little too much.

jeff williams
07-03-04, 02:07 PM
No replace hangers sorry..

Rear? I do have an arm that's big enough to over a 32.
My 'plan' was to get a 30 T bail-out and my derailler goes max28. I was to remove this armature? and swap out with the shorter on the bike.

Naw, I'm realizing your wanting to the other way, shorter.
Anyway, some deraillers that scan the cogset fine, but cannot reach over larger cogs can be adapted by using long armatures. Bit tricky. Could go the other way too.

I'm gonna shutup now 'cause i'm sounding more vauge than helpful.

Bla.

(I have several 678 f and rear and couple road 6, can be cannibalized if you need, free.) I get tired of buying replacement etc, so I rebuild if I can.

Phatman
07-03-04, 04:49 PM
I think that the guys who use road mechs are extreme XC geeks who use road cassettes anyway for the lighter weight and closer-spaced cogs.

Maelstrom
07-03-04, 05:39 PM
Actually the irony is, a lot dhillers use them. Light, durable and very very short.

Jeff, thanks for the tip. I don't really have enough spare parts to play. Besides I have been wanting to try sram for a while, guess this is my chance. Between both bikes I have my Kona going for a short while till I get my parts back from my shop :)

thanx for the help guys

Retro Grouch
07-03-04, 06:19 PM
[QUOTE=jeff williams]No replace hangers sorry..

Rear? I do have an arm that's big enough to over a 32.
My 'plan' was to get a 30 T bail-out and my derailler goes max28. I was to remove this armature? and swap out with the shorter on the bike./QUOTE]

The length of the derailleur arm isn't the issue. The issue is the position of the upper pulley relative to the biggest cog. It looks to me like that is determined by the size and geometry of the parallelogram.

The length of the arm has to do with chain slack take up capacity which is an entirely different issue.

jeff williams
07-03-04, 08:38 PM
[QUOTE=jeff williams]No replace hangers sorry..

Rear? I do have an arm that's big enough to over a 32.
My 'plan' was to get a 30 T bail-out and my derailler goes max28. I was to remove this armature? and swap out with the shorter on the bike./QUOTE]

The length of the derailleur arm isn't the issue. The issue is the position of the upper pulley relative to the biggest cog. It looks to me like that is determined by the size and geometry of the parallelogram.

The length of the arm has to do with chain slack take up capacity which is an entirely different issue.

****, your right and replacing the parellagram arms looks way harder. I can have this done in a shop, (offer with the bail-out gear idea.) want to DYI, as always. Not sure WHAT they were going to do?

Edit: looking at it more, not the parellagram arms, that's cogset scan, position of first wheel on the arm is the feed wheel to the cogset. it has to be able to move more...i thinking its the arm, but the gear must be lower\back on the arm?

confusing, interesting..