|Dura Ace w/ a 12-27 cassette||took|
Aug 8, 2003 7:20 AM
|Anyone used a 9-spd DA derailleur w/ a 12x27 cassette? will it work? I'm doing a six gap century and need a serious bail-out gear for one of the climbs.|
|I will be installing one in a few days, I'll let you know. (nm)||Uprwstsdr|
Aug 8, 2003 7:34 AM
|re: Dura Ace w/ a 12-27 cassette||Rusty Coggs|
Aug 8, 2003 7:36 AM
|Sure it works.May have to fiddle with the "B' tension, and make sure the chain is long enough if you mess up and get ino the big/big.|
|Be a man........use an 11-21.......................nm||MR_GRUMPY|
Aug 8, 2003 7:49 AM
|Works w/ Ultegra long cage triple||pitt83|
Aug 8, 2003 8:15 AM
|Again, adjust the "B" screw so the cogs clear the tension sprockets and the chain doesn't rub.|
|Just try it on your regular DA derailer ...||pmf1|
Aug 8, 2003 8:48 AM
|There is no need to monkey with the "B" screw. I swap from 12-27 to 12-23 all the time. No changing of the derailer settings or chain length required.
And you don't need a long cage triple derailer either. That's only for a triple. If you have a triple, you have it. If you have a double, you don't need it.
If you don't know the answer to a question, its better to keep your mouth shut and be assumed to be a fool, than open it and remove all doubt.
|12-27 cassette and A. Lincoln||Ironbutt|
Aug 8, 2003 3:10 PM
|Good advice on the cassette. Works fine for me too, and my bike has a pretty short chanistay. By the way, the actual quote is: "'Tis better to be silent and be thought a fool than to speak and remove all doubt."
|Why a long cage??.....||Rusty Coggs|
Aug 8, 2003 11:55 AM
|Every one of the short shimano 9 speed road RD is speced for a 27 cog and will handle more.|
|re: Works ok||Chen2|
Aug 8, 2003 8:38 AM
|I've used 12-27, 12-25, 13-25, 13-26, and 13-27 9-speed with my Dura-Ace drive train, all with the same D-A derailleur.
|Why wouldn't it work?||pmf1|
Aug 8, 2003 8:44 AM
|If you're really worried, you can also get a 38 tooth small ring (I assume you have a double) from Excel. Works well and gives you a little more gear -- every bit helps on a steep hill. I used on when I did Ride the Rockies and was happy I had it.|
|re: Dura Ace w/ a 12-27 cassette||Banky|
Aug 8, 2003 9:09 AM
|I also am doing the Six Gap in September, I changed my rear to a DA 12-27, with no problems, you may have a chain length problem depending on what size rear cassette you had before. I also ordered a 38-52 front chain rings ( TA Hegoa) for a little more help. Everthing works perfect, no special tweaking necessary. From what I here the Gap is pretty serous especially Hogpen which averages a grade of 7% for 7 miles, some grades are 15%. Good luck and see you there.|
|re: Dura Ace w/ a 12-27 cassette||Tarheel71|
Aug 8, 2003 10:32 AM
|In addition to the chain length, I also turn my B-tension screw in pretty far to keep the upper pulley from running to close to the 27 cog.|
|Banky, where's you get those rings?||pedalAZ|
Aug 8, 2003 7:08 PM
|I've been looking for those.|
|Banky, where's you get those rings?||Banky|
Aug 11, 2003 8:59 AM
|Go to QBIKES.com and search TA Chainrings. I got mine from Peter White Cycles. Over Priced and not very cooperative, I will get them elsewhere in the future!|
Aug 11, 2003 12:28 PM
|re: Dura Ace w/ a 12-27 cassette||moving up|
Aug 8, 2003 12:07 PM
|Made this exact change and replaced the Ultegra cassette w/ a DA 12 - 27. Did not change or tweak anything other than the cassette change and it works better than the original setup. As for the "be a man comment" forget that idea and save your knees and strength. Heras rode a 3 ring up L'Angliaru last year in the Vuelta. It's the result that counts, not the misery en route. Good luck on your ride.|
|Works fine if you don't go big-big||spookyload|
Aug 8, 2003 2:31 PM
|Then your chain will be way too short. Have fun at six gap. The only thing that saves you there is it isn't at altitude.|
|I just popped in an Ultegra 12-27 and it's great||lotterypick|
Aug 8, 2003 2:34 PM
|Works like a charm and my shifting needed no adjustment.
The 27 improved my commute time by 6 minutes! Not killing myself up some hills, just spinning like a spinning fool.