[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-22 Thread Juhani
It seems like the shifter is working now! :)

Almost too embarrassing to tell how it went. I never got the shifting
adjusted while the bike was in the stand (actually 2 different
stands). Trust me, I tried everything. That’s why I never tried it
loaded - the shifting seemed far too nasty for that.

Then I went for a ride today and headed to the hills nearby. I was
riding with friction shifting, but thought I’d try the indexing just
for fun for those gears that worked. I actually read the link that
Eddie mailed (Thanks Eddie!). The article said “Most bikes shift
differently in the stand than they do under load.” So I gave it a try.

To my great surprise, the shifting was completely different under
load. So I actually got the shifting adjusted so that it works fine on
all gears. It was much easier than while the bike was in the stand.

I couldn’t hear any noise or anything from the gears. But it was very
windy and hard to hear anything, so we’ll see. All the gears seemed to
be allright though.

It’s still a mystery to me why it didn’t work in the stand, but I
guess it’s two completely different things to use it under load or
unloaded.

Thanks for all the help!

If you have any reflections around this, please let me know.

Regards, Juhani

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[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-21 Thread Juhani
Hi guys,

Yes, I’m still trying to figure out the problem. I promise I'll let
you know if I get it fixed.

At the moment, I’m riding the bike with friction shifting, but I hope
the indexing is eventually going to start working.

I'll show the bike to the mechanic in my LBS next week. The guy in
internet shop who sold me the shifter (and the other stuff) is going
to talk with his mechanic as well. Maybe they can figure it out.

Thanks for the link Eddie. I’ll check it out.

And thanks for the advices Jim. I’ve checked all the housing ferrules
and I think they’re just fine. Also both cassette and freehub body is
correctly torqued.

Regards, Juhani

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[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-19 Thread Juhani
The cable is routed correctly I think. Here’s a link to Shimano’s
technical instructions for the derailleur:

http://techdocs.shimano.com/media/techdocs/content/cycle/SI/SI_5W50A_001/SI_5W50A_001_En_v1_m56577569830616237.pdf

I’ve followed the instructions and secured the cable in the groove as
supposed.

What a mysterious problem...

J

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[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-18 Thread Juhani
I called my LBS, but they’re leaving to a bicycle show over the
weekend. Their mechanic ask me every same question as you guys, and he
couldn’t understand what could be wrong.

He told me that it sounds like it’s something wrong with the shifter
or that Shimano has changed the cable pull for the 2010 rapid rise XT
(which he hadn’t heard of).

He said that even with quite bend derailleur hanger the index should
work quite OK. So if it looks as straight as mine and works fine with
friction, he thought it couldn’t be the problem.

What do you think? I live in a country side and this is the only good
bike shop here.

Sometime after the weekend I could go and show him the bike if I
haven’t figured it out yet, but he said he really hasn’t clue what
could be wrong.

I triple checked that the shifter washers are mounted correctly and
added torque to Shimano’s recommended max 3Nm. But the problem
remains. Friction shifting works fine though.

Juhani

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[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-17 Thread Juhani
Thanks for all the answers.

Earl Grey: Yes, the shifters is 9-speed (or atleast it has “compatible
with 9-speed” text on it). I used Silver Shifters before, but I found
it really difficult to shift between the 4 largest cogs on 11-34 9-
speed cassette while riding uphill with some cable tension. That’s why
I wanted to go indexed.

reynoldslugs: Did changing to Paul Thumbies solve the problem
completely? Is the shifting as fine as with your Bob Jackson now?

Jim: I checked that the cable is routed and attached to the derailleur
correctly. The derailleur hanger looks just fine, but I don’t know how
to check it more than that.

Kuma: If I adjust the cable so that the 3-4 largest cogs shift nicely,
the 3 smallest ones won’t - the derailleur jumps over the 2nd smallest
cog and the smallest and 3rd smallest make noise.

If I adjust the derailleur so that the 3 smallest cogs shift nicely,
the largest ones won’t - the derailleur jumps over the 2nd largest cog
on the way down and on the largest cog the chain rides on the top of
the cog almost dropping down to the smaller cog. 3rd largest makes
noise as well or the chain rides on the top of it.

Frederick, Steve: The dropouts are vertical.

AJ: The washer is installed correctly I think (pointing straight
down). Would it shift all the 9 clicks, if it was installed wrong?

I also loosened the cable and tightened it without the 4th hand tool,
played with different cable tensions and positions with the adjuster.
Nothing really helped.

So basicly the problem is that on the largest cogs I’d need more slack
on the cable and on the smallest cogs I’d need more tension on the
cable.

Any more ideas?

Juhani

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[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-17 Thread Juhani
Yes, it’s frustrating because I’ve only heard good things about this
combination, but for some reason I can’t get it right.

My rear cassette has 9 cogs for sure. And even if it didn’t, my Dura
Ace shifters has written on them: “Compatible with RD-7700(9s) 
RD-7400(8s)”. So it should work even with 8-speed cassette, right?

I haven’t taken the rear derailleur apart so the pulleys are in the
same place as it was mounted in the factory. It worked fine with the
Silver Shifters - except my problem with dialing in the biggest cogs
right. And now I can get some of the cogs working - like 3 largest or
3 smallest - but not all of them at the same time.

I haven’t torqued the mounting screw with a torque tool, so I’m not
sure, but I don’t think it’s over the 10Nm recommendation. I could try
to loosen it up a bit, if you think it could cause the problem.

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[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-17 Thread Juhani
OK, but anyways it's a Shimano XT 9-speed cassette with XT 9-speed
chain. I counted the cogs.

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[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-17 Thread Juhani

It's a Shimano RD-M770 SGS rear derailleur. Technical Service
Instructions paper says Gears: 9.

http://bike.shimano.com/publish/content/global_cycle/en/us/index/products/mountain/deore_xt/product.-code-RD-M770-SGS.-type-.html
http://techdocs.shimano.com/media/techdocs/content/cycle/SI/SI_5W50A_001/SI_5W50A_001_En_v1_m56577569830616237.pdf

On 17 Nov, 22:30, Steve Palincsar palin...@his.com wrote:

 I was just looking at Sheldon's Dura Ace compatibility chart
 (http://www.sheldonbrown.com/dura-ace.html) and it made mention of a 10
 spd Shadow MTB rear derailleur that is compatible only with a 10 speed
 Shadow shifter.  Is there any chance this could be one of those?

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[RBW] Re: Problem with adjusting the rear derailler / bar-end shifters

2010-11-17 Thread Juhani
I mixed things a bit in my answer about the torque. The bar-end
shifter pods are torqued without tool, but I think they are just right
- around 7Nm. They seem very sturdy. The screw that goes through the
middle of the shift lever is tightened with a high quality torque tool
to recommended 2,5Nm - and the shift lever feels just right with the
“clicks”. The rear derailleur attachment bolt is torqued without a
tool, but should be around the recommended 10Nm.

The derailleur hanger looks just fine - it doesn't seem to be bend in
anyway. Should I be able to see if there was something wrong with it?
In friction mode the shifting works fine. Or could it mess up the
index shifting if it was off just tiny little - not visible for eye?

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[RBW] Problem with adjusting the rear derailler / bar-end shifters

2010-11-16 Thread Juhani
Hi,

I’ve problem with adjusting my rear derailleur. It’s a Shimano XT 9-
speed low normal (rapid rise) with XT 11-34 cassette and XT 9-speed
chain. All of those are quite new and shouldn’t be worn out. The cable
is new and just lubricated and the housing should be fine as well.

The shifters are brand new Shimano Dura-Ace 9-speed bar-end shifters
which I’m trying to install.

Adjustment of the B-screw and H-  L-limit screws should be fine. I
turned the adjuster on down tube cable stop halfway between all the
way tight and all the way loose before attaching the cable. The cable
is tightened with 4th hand tool so there shouldn’t be any slack in it.

I adjusted the rear derailleur like this: I chose the middle chain
ring in the front and shifted to second largest cog in the rear. Then
turned the adjuster until it shifted to third cog. Then I turned the
adjuster back so that the derailleur shifted back to the second cog.
And finally adjusted it so that it wouldn’t make any noise.

The derailleur shifted relatively fine on the biggest cogs, but not
the 3 smallest ones. If I adjusted it so that the smallest ones
shifted fine, then the biggest wouldn’t - and vice versa.

Any ideas how to get it right?

The low normal rear derailleur and Dura-Ace bar-end shifters should be
compatible, right?

Juhani

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[RBW] Re: Friction shifting with Dia Compe bar end “Silver Shifters”

2010-08-17 Thread Juhani Laitela
Thanks for the answer.

I guess I need to go to the closest hills and ride around until I
learn how to shift :)

Did you mean that for the steeper hills, before it gets steep I should
figure out a gear that I can maintain the whole hill? So I actually
wouldn't shift at all when riding uphill?


2010/8/17 Jim Cloud cloud...@aol.com:

 When you're shifting while climbing you really need to anticipate a
 shift and begin changing gears before the grade of the hill becomes
 steeper.  If you're trying to shift with any substantial pressure on
 the pedals there's too much tension on the chain to allow the
 derailleur to move the chain up on the cogs.  If you've gotten into
 the grade and cannot easily shift it's better to dismount and spin the
 pedals as you lift the rear wheel and move the shifter lever to get
 into a gear you can maintain on the grade.  Keep practicing, it will
 become second nature to anticipate a gear change in advance of the
 increasing grade of a hill.

 Good Luck!
 Jim Cloud
 Tucson, AZ

 On Aug 16, 11:27 am, Juhani Laitela juhani.lait...@gmail.com wrote:
 I’ve some difficulties with friction shifting with my Dia Compe bar
 end “Silver Shifters”.

 They work fine when I’ve my bike in repair stand and also when riding
 on flat or downhill, but when climbing uphill, especially with some
 load and on steeper hill, the rear cogs really make noise when
 shifting to the biggest cogs (with the smallest chainring). I’m almost
 afraid the cogs are going to brake or something. I’ve the problem when
 shifting both to bigger and smaller cogs when riding uphill and using
 the bigger cogs.

 My rear derailler is Shimano XT low-normal / rapid rise, cassette
 Shimano XT 11-34 and chain Shimano XT. Cranks are Sugino XD2 46/36/26.
 The chain length is like Sheldon Browns recommends.

 I’ve been trying different strategies on shifting as well as reducing
 the pedal pressure. The latter almost to the point of loosing my speed
 altogether.

 I’d appreciate any help or guidance with my problem. Maybe I’m just
 too new to the shifters (around 500 miles), but I feel like I’m just
 not getting it :(

 J


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[RBW] Friction shifting with Dia Compe bar end “Si lver Shifters”

2010-08-16 Thread Juhani Laitela
I’ve some difficulties with friction shifting with my Dia Compe bar
end “Silver Shifters”.

They work fine when I’ve my bike in repair stand and also when riding
on flat or downhill, but when climbing uphill, especially with some
load and on steeper hill, the rear cogs really make noise when
shifting to the biggest cogs (with the smallest chainring). I’m almost
afraid the cogs are going to brake or something. I’ve the problem when
shifting both to bigger and smaller cogs when riding uphill and using
the bigger cogs.

My rear derailler is Shimano XT low-normal / rapid rise, cassette
Shimano XT 11-34 and chain Shimano XT. Cranks are Sugino XD2 46/36/26.
The chain length is like Sheldon Browns recommends.

I’ve been trying different strategies on shifting as well as reducing
the pedal pressure. The latter almost to the point of loosing my speed
altogether.

I’d appreciate any help or guidance with my problem. Maybe I’m just
too new to the shifters (around 500 miles), but I feel like I’m just
not getting it :(

J

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