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problems with Ult. STIs/XT rear derailleur not playing well(5 posts)

problems with Ult. STIs/XT rear derailleur not playing wellfloatch
Apr 1, 2003 11:08 AM
I have new Ultegra STI shifters on my cross/road bike with a new XT rear derailleur. On my other road bike, my Ultegra STI's are mated with an ultegra rear D.
Here's the deal... On the cross/road bike, it shifts fine, but doesn't have the nice "click" when upshifting to an easier rear cog. With the ultegra rear D on the other bike, there's an audible click and a solid feel when upshifting to easier cogs, even when shifting through multiple gears.
On the cross/road bike, I have to kind of feel for the gears to change, rather than just listen for the click. This is important to me, and annoying, and I hope there's some fix, perhaps with the B tension screw?
By the way, I'm using Ultegra chains on each bike.
Any ideas?
May be a little of base but...txcross
Apr 1, 2003 11:37 AM
Considering the ratcheting mech. for shifting is contained in the brake/shifter combo I can think of three things.

1) As you stated, tightening the B screw may help. By doing this you should increase the tesnsion in your cable enough to add a little more feel in your shifters.

2) It has nothing to do with your rear D at all. To check this simply swap your derailleurs. If your CX bike still has the vague shifting, well it's your new shifter.

3) The spring inside your ultegra is stronger than in the XT. In general I find that my Tiagra rear D has more spring tension than my Deore rear D. These are much lower components than you are running so it probably doesn't count for you.

good luck
re: problems with Ult. STIs/XT rear derailleur not playing wellTWD
Apr 1, 2003 3:20 PM
I'm running XT rear der. and 105 STI on my cross bike. It shifts ok with a mtb cassette on my off road wheels, but is really sloppy with a road cassette/road wheels. I asked about it over on the cross board, and the consensus was that it may be a chain length issue.

Since I swap between road and off-road wheels on a daily basis, I can't shorten my chain any, so I can't say for sure that shortening it would help.

In your case, you might at least want to double check your chain length to make sure it isn't too long.
re: problems with Ult. STIs/XT rear derailleur not playing welledmundtan
Apr 2, 2003 3:14 AM
A lot of roadies would die for such silent and smooth shifting as the one you experience. I don't think there's a problem at all.
solution??roadboy
Apr 2, 2003 6:27 PM
Here's the thing I have set up many cyclocross bikes with mountain der at the shop I work for. The mountain der never shift quite as well as the road der, because they typically have less spring tension and usually have a longer cage both of which slow shifting. the only exception I have seen is a short cage XTR der because you can crank up the spring tension and the shorter cage means quicker shifts. However nothing beats a road der mated to an STI lever. Depending on what cogs you are using maybe go with an ultegra on the cross bike, I have one on my cross bike and it works great. Also the ultegra rear der sometimes works with cogs larger than 27 teeth but that really depends on the bike Hope this helps.