|rerun but still curious-DA triple chain rub question||eflayer2|
May 31, 2002 5:49 PM
|Does anyone own a Dura Ace triple that can use all gears without chain rub? I know it's not good for chain, cogs, or rings, but would still rather not hear it, even by accident. My Ultegra triple does not rub in any gear. Is there something about the mechanicals of the DA triple that would prevent it from being adjusted to a point of no chain rub? Any responses about 100% successful installs would be appreciated.|
|re: rerun but still curious-DA triple chain rub question||DaveG|
Jun 1, 2002 10:07 AM
|I think you might be asking for the impossible. There is tremendous overlap in gearing on a road triple the renders those extreme chainlines unnecessary. This gets worse on bike with short chainstays. Just avoid those extreme big ring-big cog small ring-small cog shifts. You don't need them and as you stated they are hard on your drivetrain.|
Jun 1, 2002 12:20 PM
|I have the new DA triple, and although I expect problems if I cross chain, I think I should be able to use the middle (39) silently in all gears, and I'm not even close to that.
It was recently built so I figure it is just break-in, but I'll be ticked if I can't get it to settle down.
Jun 24, 2002 10:48 AM
|It is amazing to me that this so called high end product is such a problem. I can't even use the three inner gears while in my middle ring without losing my chain or having it shift into the granny gear on its own. I have had many a spill thanks to this, tough to stand for a climb and lose all traction. I have tried several suggestions but I feel they are chewing gum and spit fixes rather than having the quality item we purchased to begin with! And has anyone tried to contact Shimano-impossible!|
Jun 24, 2002 11:19 AM
|Shimano may have their faults, but they know a thing or two about designing a triple drive train to work correctly and holding tollerances during the manufacturing process. |
It really comes down to having a wiley wrench setup the drive train. Road triples are very demanding and most wrenches either don't have the experience, time, patience or feel to get it just right. In reality it can be working fine in the shop, but it isn't until you spend some time in the saddle that you really notice the problems and then get it dialed in. One of the more fundamental factors is the the front der. must be set exactly right in terms of height, but more importantly the angle. If the outer cage isn't close to exactly parallel with the crank you will be chasing your tail. A complicating factor is that when you tighten the clamp on the seat tube the der. shifts ever so slightly. It's equivalent to a finely tuned instrument and needs to be approached from this angle.
I'd say you need to find a better wrench - remember if they haven't riden a road triple they don't have enough experience. MTB stuff is child's play.
Jun 24, 2002 1:48 PM
|I have been into the shop so many times and I truly believe they are doing their best. Unfortunately if I take it elsewhere I will have to pay for all these changes and replacements, as it is they are considering it a new bike and changing things out. Could it be that the Aegis Swift, which is a 650 sized bike, is the problem? My other road bike is a Bianchi with Campy low end triple but is so smooth and easy to shift. Is it wise to mix the Dura ace double and XTR rear on a road bike and just get this triple off completely?|
Jun 24, 2002 5:41 PM
|Hmmm, a 650 wheel usually has shorter chainstays and this can be a factor since the angle of deflection will be higher. I'd avoid such a setup b/c it's not worht the hassle IMO. |
I almost hate to ask, but what are you doing with a hgihend triple on what is essentially a TT/Tri bike - unless you're on the small side of things?
Lots of people use and XTR rear on a roadbike and do just fine.
Jun 25, 2002 3:24 PM
|That is exactly my situation. But this frame fits like it was made just for my height, leg length etc. so I am trying to get the gears that I want to work with it. I love the bike it is light and forgiving on rough road but these darn gears-especially the triple-what a pain to shift! When I bought it it had a double and was as smooth as could be, my husband suggested the triple due to all the hills we climb but I am so disappointed in it! Perhaps I will go back to the double and change to an XTR after all.|
|re: rerun but still curious-DA triple chain rub question||samcat|
Jun 1, 2002 11:17 AM
|I've got about 900 miles on a DA triple on my "new" tourer, running a 12/27 block.
I can run the bottom 7 in the granny, all the cogs in the 39 and the top 8 in the 53 with no noise or rub. Can trim out both the large and middle chainrings.
Cannot ask for better running than that...It's flawless. Crisp, quick and positive shifting. Only noticeable difference in shift quality between it and the D/A double on my road bike is that the triple requires slightly more pressure on both the right and left dump levers. The feel is almost "notchy".
|re: rerun but still curious-DA triple chain rub question||DustyClark|
Jun 1, 2002 6:14 PM
|Hello, eflayer2, slide down the discussion thread under components to DA TRIPLE TROUBLE Help? I have been going through this too, and have received several replies. I have an Ultegra Double which shifts flawlessly, and an older Shimano triple that does too, but the new DA triple I just bought is terrible. I think this is basically a poor design and you have to put on a shorter BB just to keep the chain on the bike. I would never have purchased it had I known the trouble I was getting into trying to trim it out to stop the grinding and rubbing. No amount of adjustment will stop the chain rub. My LBS won't even discuss making it right with me, they still have the bike, and I am out $4,000 for a new Trek 5500 OCLV with the DA triple that shifts like a $79 K-Mart special. Totally embarrassing. Hope you have better luck with it than I did. Dusty Clark, firstname.lastname@example.org (Feel free to email me)|
|re: rerun but still curious-DA triple chain rub question||bludoggy|
Jun 2, 2002 12:40 PM
|Is your frame a Trek, by chance?|
|frame is steel Serotta csi||eflayer2|
Jun 2, 2002 2:14 PM