My right dura ace STI has suddenly gone from nine to eight speed. The last click no longer happens and the derailleur moves back down to the next smallest cog, after releasing the lever.
I just changed derailleur from an old dura ace (that had play in the bolt on to the hanger) to a new 10 speed 105 and changed the cables and housing but this shouldn't have have caused a problem should it?
I have also tried hosing the thing down with WD40, as suggested in other threads, but no joy.
Is it time to bite the bullet and get another set of STIs?

Thanks for any opinions.

Is a set screw too tight?

My right dura ace STI has suddenly gone from nine to eight speed. The last click no longer happens and the derailleur moves back down to the next smallest cog, after releasing the lever.
I just changed derailleur from an old dura ace (that had play in the bolt on to the hanger) to a new 10 speed 105 and changed the cables and housing but this shouldn't have have caused a problem should it?
I have also tried hosing the thing down with WD40, as suggested in other threads, but no joy.
Is it time to bite the bullet and get another set of STIs?

Thanks for any opinions.
Do you have the shifter all the way released before attaching the cable? Pull on the cable and hit the paddle a few more times, then attach the cable to the RD. It would be strange (but possible) for it to break at the same time as you made the changes. I would seriously check for something done wrong before getting a new shifter. - TF

My right dura ace STI has suddenly gone from nine to eight speed. The last click no longer happens and the derailleur moves back down to the next smallest cog, after releasing the lever.
I just changed derailleur from an old dura ace (that had play in the bolt on to the hanger) to a new 10 speed 105 and changed the cables and housing but this shouldn't have have caused a problem should it?
I have also tried hosing the thing down with WD40, as suggested in other threads, but no joy.
Is it time to bite the bullet and get another set of STIs?

Thanks for any opinions.

Sounds like the low gear limit screw on the derailleur isn't set low enough. If it shifts ok on the other gears, but just doesn't go all the way on the largest cog, that may be it. You may just need a quarter to half turn on the screw to get it to go.

Ok Thanks for the suggestions
I'll have a go with the limit screw

I just tried loosening off the limit screw and still no luck.
Pulling on the cable I only get 7 clicks I guess atooth must have broken off the ratchet or something's jammed in stopping the lock mech from working.
Any other ideas?
Time to go 10 speed:idea:

I just tried loosening off the limit screw and still no luck.
Pulling on the cable I only get 7 clicks I guess atooth must have broken off the ratchet or something's jammed in stopping the lock mech from working.
Any other ideas?
Time to go 10 speed:idea:

Methinks yer STIs are sm()ked...
////can't think of anythin.

http://cgi.ebay.co.uk/Shimano-Ultegra-9-speed-STI-shifter-Flightdeck-comp_W0QQitemZ230034659158QQihZ013QQcategoryZ42330 QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
It seems like the cheapest option but if I were to get new stuff I might as well get 10 speed right?

I just tried loosening off the limit screw and still no luck.
Pulling on the cable I only get 7 clicks I guess atooth must have broken off the ratchet or something's jammed in stopping the lock mech from working.
Any other ideas?
Time to go 10 speed:idea:
Which cog can't you get to? - TF

Why not get a bike shop to look at it? I am all for self wrenching but if you haven't even tried the limit screw before asking a question here, then you must be a fairly new wrench.

One would think the clicks in the middle are used more and tend to fail sooner than other clicks. The shop might be able to help.

http://cgi.ebay.co.uk/Shimano-Ultegra-9-speed-STI-shifter-Flightdeck-comp_W0QQitemZ230034659158QQihZ013QQcategoryZ42330 QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
It seems like the cheapest option but if I were to get new stuff I might as well get 10 speed right?

I wouldn't be so quick to purchase something just yet. try and see if the issue can be fixed. it seems that something isn't installed/adjusted properly. I mean it stopped working right after you installed something. Is the cable housing the same diameter? I once used some 5mm housing, and it was too stiff for my set up, and I had to go back to the 4mm. Why don't you put back the parts you had on before, and see how it goes then.

if you're going to get another shifter, I've seen NEW right/rear DA9 shifters going on ebay for about $120 or so, that's the way I'd go. the DA9 is a much better shifter than the ultegra9 (I have both of them), plus going to 10 speed is going to cost a lot more than that

added, found this on ebay for ref. http://cgi.ebay.com/Shimano-Dura-ace-ST-7700-C-road-bike-shifter-9-speeds_W0QQitemZ230036117270QQihZ013QQcategoryZ361 40QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Or just stay with 8! :)

Let your lbs wrench look at it before you run out and get new gear.

I've only been wrenching my bike since I got it about a couple of years ago, but... i am a qualified auto mechanic who has been through the parktools website (referenced frequently on this forum). The step by step instructions they give are really pretty fool-proof if you have a little technical savvy and I was just looking for any extra input.

I had adjusted the limit screws as the ranged set on the derailleur out of the box was small (I guess to stop someone throwing it into the spokes and wrecking a wheel if riden unadjusted)

The problem with the LBSs around here is the labour cost.
The roadies in Geneva Switzerland are pretty well off on the whole who often change bike every year or so. The whole sport is financialy out of my league if I get my wrenching done by a shop.

I won't buy anything before I am damn sure it's shot (can't afford to) and I think I was looking for some suggestions to avoid the unavoidable (hope not).
Thanks again for the advice.

Disconnect the cable from the derailleur. No need to worry about fiddling with the set screws. Hold the cable taunt with your fingers, then cycle through the shifting mechanism.

If the lever is just not ratcheting in that last click, you might try holding the smaller inner shifter as inward as possible as you try upshifting. If you're lucky, it'll catch and shift... I've got an old Ultegra/600 8spd shifter that is a little binky like that, but since I don't demand lightning fast up-shifts it's not worth replacing yet...

Ok I'll give that another go with the cable totally loose. It was really loose in the smallest cog but I'll try again.
Thanks:)

It was really loose in the smallest cog

Fix this before you go any further. Use the Park instructions if need be to adjust your derailleur properly. If you have a lot of cable slack in the small cog you are not set up correctly and the shifter is likely 'wasting' its first click or two eliminating this slack. You shouldn't have any appreciable slack in the cable.

Take the cable completely off of the derailleur and follow the Park instructions to properly 'set' the upper and lower limit screws before you reattach the cable.

I put the old D-A rd back on. Still only 7 clicks, but the chain is on the last cog(9th) after the last click with a jump of two gears in between. I think I have had an 8 speed shifter all along:blush2: . In my defence I was given the bike with a 9 speed cassette on it and the shifting had been not too bad. I imagine the play in the old rd allowed it to settle into on gear or another.
Is the width of 8 and 9 cassettes similar?
I guess the next step is to look for an 8 speed cassette?
Thanks again for all the suggestions.
BTW is there a number stamped on the shifter to put my mind at rest? I've checked but couldn't find one.

I put the old D-A rd back on. Still only 7 clicks, but the chain is on the last cog(9th) after the last click with a jump of two gears in between. I think I have had an 8 speed shifter all along:blush2: . In my defence I was given the bike with a 9 speed cassette on it and the shifting had been not too bad. I imagine the play in the old rd allowed it to settle into on gear or another.
Is the width of 8 and 9 cassettes similar?
I guess the next step is to look for an 8 speed cassette?
Thanks again for all the suggestions.
BTW is there a number stamped on the shifter to put my mind at rest? I've checked but couldn't find one.
The number is generally molde into the body under the rubber hood. - TF

ST 6400 Guess that makes it 8 speed ultegra no?
I can't believe I've been running a 9 cassette for so long.
Anyway thanks again for your help:thumbsup:

Have you tried adjusting the cable tension? If you're having trouble shifting to the biggest cog maybe you just need to turn the barrel adjustor 1/2 turn or so counter-clockwise.
Otherwise try TurboTurtle"s suggestion, loosen the cable from the derailleur, flip the small shift lever several times while pulling the slack out of the cable, then re-attach the cable and adjust the tension as needed.

Al

ST 6400 Guess that makes it 8 speed ultegra no?
I can't believe I've been running a 9 cassette for so long.
Anyway thanks again for your help:thumbsup:


are you serious?

In my defence I was given the bike with a 9 speed cassette on it and the shifting had been not too bad. I imagine the play in the old rd allowed it to settle into on gear or another.
The nine speed cassette on it was wrecked but still 9 so I got the same. The shifting was poor but not atrocious.