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Derailleurs for FSA compact double and Ultegra STI
Hello,
My bike is currently setup with all Ultegra-triple (circa 2003 STI, crank, FD, 9s cassette, and RD). I'm planning on moving the crank, FD, and RD to a different bike. In their place I'm installing an FSA compact double (50/34), and a new FD and RD. What is my best bet for the FD and RD for this setup? Of course compatibility with 9s Ultegra STI levers is a must, and I'm planning on using an 11-23 cassette. I've seen suggestions for the DA-7700 FD, but I also see an FSA FD that claims to be specifically made for compact doubles with a 16T capacity. My primary concerns are reliability and shifting compatibility. I'm not concerned about weight. Thanks for any suggestions, Sam |
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Derailleurs for FSA compact double and Ultegra STI
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Derailleurs for FSA compact double and Ultegra STI
On 2 Jan 2007 05:54:15 -0800, "Qui si parla Campagnolo"
wrote: wrote: Hello, My bike is currently setup with all Ultegra-triple (circa 2003 STI, crank, FD, 9s cassette, and RD). I'm planning on moving the crank, FD, and RD to a different bike. In their place I'm installing an FSA compact double (50/34), and a new FD and RD. What is my best bet for the FD and RD for this setup? Of course compatibility with 9s Ultegra STI levers is a must, and I'm planning on using an 11-23 cassette. I've seen suggestions for the DA-7700 FD, but I also see an FSA FD that claims to be specifically made for compact doubles with a 16T capacity. My primary concerns are reliability and shifting compatibility. I'm not concerned about weight. 6500 FD and RD or 7700/7800 RD. DO NOT use a 6600/7800(10s) FD, shorter arms, not enough travel with 9s STI. IRD 'compact' not necessary. Compact FD not "necessary," but may work better than a Shimano 6500 with Ultegra levers. Having used all kinds of different lever/FD combos with my 50/34 compact, I like a FSA C-16. Comparably priced, so why not go for the compact specific? Also, your cassette choice will give you gear ratios substantially similar to a 12-25 with 53/39. So in that case, why go compact up front at all? The general idea for compact - at least my approach - is to gain at least one lower gear over a "typical" 53/39 set up, with the sacrifice of more 2 gear jumps in the block. Meanwhile, the 11 tooth cog saves your high gear. So 11-25 at least would be necessary to gain one lower gear. The problem with the gear jumps is one reason why I switched to 10 speed when I went compact up front. I now run a "radical" 11-28, so I can climb virtually anything seated using the little ring, but can stay in the big ring in a larger variety of terrain than before. |
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Derailleurs for FSA compact double and Ultegra STI
Doug Taylor wrote:
On 2 Jan 2007 05:54:15 -0800, "Qui si parla Campagnolo" wrote: wrote: Hello, My bike is currently setup with all Ultegra-triple (circa 2003 STI, crank, FD, 9s cassette, and RD). I'm planning on moving the crank, FD, and RD to a different bike. In their place I'm installing an FSA compact double (50/34), and a new FD and RD. What is my best bet for the FD and RD for this setup? Of course compatibility with 9s Ultegra STI levers is a must, and I'm planning on using an 11-23 cassette. I've seen suggestions for the DA-7700 FD, but I also see an FSA FD that claims to be specifically made for compact doubles with a 16T capacity. My primary concerns are reliability and shifting compatibility. I'm not concerned about weight. 6500 FD and RD or 7700/7800 RD. DO NOT use a 6600/7800(10s) FD, shorter arms, not enough travel with 9s STI. IRD 'compact' not necessary. Thanks for the tip regarding the 10s FD. I was wary of the 10s versions already, because I'd read the cage was narrower to accomodate the 10s chain. Compact FD not "necessary," but may work better than a Shimano 6500 with Ultegra levers. Having used all kinds of different lever/FD combos with my 50/34 compact, I like a FSA C-16. Comparably priced, so why not go for the compact specific? My main concern was compatibility; if the C-16 shifts fine with STI, that does seem like the better approach. Also, your cassette choice will give you gear ratios substantially similar to a 12-25 with 53/39. So in that case, why go compact up front at all? The primary reason I'm going compact double on this bike is because an FSA Carbon Pro is the only spare crankset I have laying around. You're right that a 39/25 will give me nearly the same ratio as a 34/23, but I can always swap out the cassette for a 12/27 if I find myself needing lower gears. In addition, since I'm giving up my triple on this bike (the recipient bike will be my touring bike, for which the triple seemed more appropriate), I like having the option of lower gears later on if I want them. Thanks, Sam |
#5
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Derailleurs for FSA compact double and Ultegra STI
Doug Taylor wrote: On 2 Jan 2007 05:54:15 -0800, "Qui si parla Campagnolo" wrote: wrote: Hello, My bike is currently setup with all Ultegra-triple (circa 2003 STI, crank, FD, 9s cassette, and RD). I'm planning on moving the crank, FD, and RD to a different bike. In their place I'm installing an FSA compact double (50/34), and a new FD and RD. What is my best bet for the FD and RD for this setup? Of course compatibility with 9s Ultegra STI levers is a must, and I'm planning on using an 11-23 cassette. I've seen suggestions for the DA-7700 FD, but I also see an FSA FD that claims to be specifically made for compact doubles with a 16T capacity. My primary concerns are reliability and shifting compatibility. I'm not concerned about weight. 6500 FD and RD or 7700/7800 RD. DO NOT use a 6600/7800(10s) FD, shorter arms, not enough travel with 9s STI. IRD 'compact' not necessary. Compact FD not "necessary," but may work better than a Shimano 6500 with Ultegra levers. Having used all kinds of different lever/FD combos with my 50/34 compact, I like a FSA C-16. Comparably priced, so why not go for the compact specific? Because in the dozen or so I have installed, not necessary. 6500 one works great. Also, your cassette choice will give you gear ratios substantially similar to a 12-25 with 53/39. So in that case, why go compact up front at all? Actually 50/34 and 11-23 gives a higher high and a lower low gear than 53/39-12/25 combo. Close but actually wider. The general idea for compact - at least my approach - is to gain at least one lower gear over a "typical" 53/39 set up, with the sacrifice of more 2 gear jumps in the block. Meanwhile, the 11 tooth cog saves your high gear. So 11-25 at least would be necessary to gain one lower gear. The problem with the gear jumps is one reason why I switched to 10 speed when I went compact up front. I now run a "radical" 11-28, so I can climb virtually anything seated using the little ring, but can stay in the big ring in a larger variety of terrain than before. |
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Derailleurs for FSA compact double and Ultegra STI
On 3 Jan 2007 05:26:59 -0800, "Qui si parla Campagnolo"
wrote: Compact FD not "necessary," but may work better than a Shimano 6500 with Ultegra levers. Having used all kinds of different lever/FD combos with my 50/34 compact, I like a FSA C-16. Comparably priced, so why not go for the compact specific? Because in the dozen or so I have installed, not necessary. 6500 one works great. I don't own a bike shop, but my experience is quite different. Shifting with Ultegra levers and Ultegra FD is noticeably slow and sluggish going up from 34 to 50 now matter how cable tension or limits are adjusted. But YMMV. Oh, and probably no point in recommending installing a chain stopper to avoid dropping the chain into the bottom bracket when shifting down from 50 to 34: I'm sure you'll have a smug comeback to that as well. Also, your cassette choice will give you gear ratios substantially similar to a 12-25 with 53/39. So in that case, why go compact up front at all? Actually 50/34 and 11-23 gives a higher high and a lower low gear than 53/39-12/25 combo. Close but actually wider. No duh. I can actually do math. I said "substantially" similar. The differences, especially the low gears, would be hard to distinguish unless your are some sort of princess and the pea pro, and I'm not. YMMV again. The point of compact is LOWER gears, and combining an 11-23 with 50/34 in lieu of 12-25 with 53/39, is, I would be so bold to assert, rather pointless. |
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Derailleurs for FSA compact double and Ultegra STI
On Wed, 03 Jan 2007 20:43:53 -0500, Doug Taylor
wrote: Oh, and probably no point in recommending installing a chain stopper to avoid dropping the chain into the bottom bracket when shifting down from 50 to 34: I'm sure you'll have a smug comeback to that as well. I ride with 51 or 50 x 38 or 39 quite a bit, and a chain stopper is useful. Even on a well adjusted bike, frantic shifting on bumpy roads can result in the chain falling. Are things different with a 34? -- JT **************************** Remove "remove" to reply Visit http://www.jt10000.com **************************** |
#8
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Derailleurs for FSA compact double and Ultegra STI
On Wed, 03 Jan 2007 21:06:11 -0500, John Forrest Tomlinson
wrote: On Wed, 03 Jan 2007 20:43:53 -0500, Doug Taylor wrote: Oh, and probably no point in recommending installing a chain stopper to avoid dropping the chain into the bottom bracket when shifting down from 50 to 34: I'm sure you'll have a smug comeback to that as well. I ride with 51 or 50 x 38 or 39 quite a bit, and a chain stopper is useful. Even on a well adjusted bike, frantic shifting on bumpy roads can result in the chain falling. Are things different with a 34? The 16 tooth drop down from a 50 to a 34 can be forceful, and the chain frequently falls off if you are not totally vigilant. Therefore, most people I know with compacts have them. A simple $4 investment: http://www.biketoolsetc.com/index.cg...item_id=CD-04B The point of my comment was anticipating that Peter would say something like: "If you know how to shift properly, you don't need a chain stopper." I do. |
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Derailleurs for FSA compact double and Ultegra STI
On Wed, 03 Jan 2007 21:06:11 -0500, John Forrest Tomlinson
wrote: On Wed, 03 Jan 2007 20:43:53 -0500, Doug Taylor wrote: Oh, and probably no point in recommending installing a chain stopper to avoid dropping the chain into the bottom bracket when shifting down from 50 to 34: I'm sure you'll have a smug comeback to that as well. I ride with 51 or 50 x 38 or 39 quite a bit, and a chain stopper is useful. Even on a well adjusted bike, frantic shifting on bumpy roads can result in the chain falling. Are things different with a 34? Dear John, My problem is at the other end of the chain. Like you, I use a chain watcher on the front and occasionally bless it when the chain decides to skip from the 53-tooth to the bottom bracket. But a few times every year, I sit up to start pedaling again after a long, fast downhill, and find that the chain has bounced off the rear 11-tooth and is stuck between the cog and the frame. I stop, undo the quick-release to free the chain, put the chain back, and ride on. The chain never falls off the back when I'm shifting to the small cog. It may be coincidence, but it usually happens when there's a gusty wind blowing from the rear quarter, so the speed is reaching 45 mph and things are a bit bouncy. I suspect that the chain run is just bouncing and finally bounces just right to come off the rear cog. Cheers, Carl Fogel |
#10
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Derailleurs for FSA compact double and Ultegra STI
On Wed, 03 Jan 2007 21:19:50 -0500, Doug Taylor
wrote: On Wed, 03 Jan 2007 21:06:11 -0500, John Forrest Tomlinson wrote: On Wed, 03 Jan 2007 20:43:53 -0500, Doug Taylor wrote: Oh, and probably no point in recommending installing a chain stopper to avoid dropping the chain into the bottom bracket when shifting down from 50 to 34: I'm sure you'll have a smug comeback to that as well. I ride with 51 or 50 x 38 or 39 quite a bit, and a chain stopper is useful. Even on a well adjusted bike, frantic shifting on bumpy roads can result in the chain falling. Are things different with a 34? The 16 tooth drop down from a 50 to a 34 can be forceful, and the chain frequently falls off if you are not totally vigilant. Therefore, most people I know with compacts have them. A simple $4 investment: http://www.biketoolsetc.com/index.cg...item_id=CD-04B The point of my comment was anticipating that Peter would say something like: "If you know how to shift properly, you don't need a chain stopper." I do. Wise. -- JT **************************** Remove "remove" to reply Visit http://www.jt10000.com **************************** |
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