|12-27 cassette with double||Yatesie|
Oct 7, 2002 6:06 PM
|I am considering changing from triple to double. I currently have a 12-25 cassette but am considering the 12-27 for climbing with the double. I was told by my LBS that I would need a triple rear d'rail for the 12-27 and I could use my triple front d'rail for the double. Will this work?|
|re: 12-27 cassette with double||B2|
Oct 7, 2002 9:30 PM
|Many (including myself) have used a 12/27 cassette with a standard cage derailleur without any problem. I'm not so sure if Shimano recommends it though.
|re: 12-27 cassette with double||moabbiker|
Oct 8, 2002 3:16 AM
|You don't need to use a triple cage for a double with 12-27, it's totally unnecessary. I even got a regular cage to work on a triple / 12-27 with a carefully tuned chain length and making sure to never use the extreme gears.|
Oct 8, 2002 3:22 AM
|I have used this combo for several years and love it. You don't need a long cage derr. the max tooth on the short cage is 27 and if you get the chain length right it will work out great. I think the front der. will work but not as well as a double. You must adjust your limits to avoid shifting to the third ring.|
|re: 12-27 cassette with double||pmf1|
Oct 8, 2002 5:01 AM
|I use a 12x27 double when I'm going to be riding hilly stuff. I even bought a 38 tooth small front ring for hilly touring. Every little bit helps. There are times when I wish I had a triple, but not enough of them to justify it to me.
I'm not sure I understand your question. You have a triple and you want to convert to a double? You'd need new cranks/rings, a new BB, a new FD and (I think but am not sure) new shift levers. Your RD is fine and you can use a 12x27 with it, or buy a new double RD and still use the 12x27 with it.
|re: 12-27 cassette with double||Yatesie|
Oct 8, 2002 5:47 AM
|I currently have a mixture of 105 and ultegra components on a Trek 5200 and I want to convert to a double to save some weight and to put my old components back on my Trek 2200. I will probably go with Ultegra for the entire package except maybe a D/A for the crankset. I've read that the Ultegra STI shifters will work for double or triple.|
|re: 12-27 cassette with double||Rusty Coggs|
Oct 8, 2002 6:10 AM
|9 speed ultegra shifters work with a double or triple.|
|12-27 cassette is fine with double||PeterRider|
Oct 8, 2002 3:18 PM
|the shimano double and triple derailleurs have the same "teeth capacity". The only difference is that the longer cage of the triple allows to wrap more extra chain. |
You don't need a front triple derailleur with a double setup, it won't shift as good.