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Changing chain rings
I would like to change my chain rings to a larger size. Currently, I have
48t, 36t, 26t triple set. I would like to change them to 53t, 43, 36 approximately. I'm looking for higher gears. This bicycle is a Cannondale tandem, and my stoker and I often run out of gears on the high end. what is the suggested number of chain links to add based upon the upgrade? TIA JONS |
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#2
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Changing chain rings
news news wrote:
I would like to change my chain rings to a larger size. Currently, I have 48t, 36t, 26t triple set. I would like to change them to 53t, 43, 36 approximately. I'm looking for higher gears. This bicycle is a Cannondale tandem, and my stoker and I often run out of gears on the high end. what is the suggested number of chain links to add based upon the upgrade? TIA JONS Chains are real cheap. Why take chances adding new links to an old chain. Chances being you do not get the little pins pushed in exactly perfectly and cause a failure at the connection and the new chain/old chain will cause skipping on the old cassette you are using. Nashbar is selling a 9 speed recumbent chain (232 links) for $15. The 8 speed version is even cheaper. That is two chains, $7.50 each. Cheap. As for how long to make the new chain, just put it on the new big chainring and around the biggest cassette cog, through the derailleur, and pull the chain as tight as possible so the rear derailleur is about as straight towards the crankset as possible. About that long or a link longer. |
#3
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Changing chain rings
news news wrote: I would like to change my chain rings to a larger size. Currently, I have 48t, 36t, 26t triple set. I would like to change them to 53t, 43, 36 approximately. I'm looking for higher gears. This bicycle is a Cannondale tandem, and my stoker and I often run out of gears on the high end. what is the suggested number of chain links to add based upon the upgrade? TIA JONS one thing about this is that since chainrings are pricey, you should probably just replace the chain as well unless it's pretty close to new. a worn chain will (somewhat) quickly wear rings and cogs down to its own state of wear. unfortunately, the same argument can be made for replacing the cassette if it's worn very much, as worn cassettes also wear down new chains somewhat quickly, which in turn will start wearing the rings. kind of a mess, huh? if the bike gets ridden a lot, then all this will have a chance to come into play, however. something i'm not sure about is how well it's going to work to have a 110/74 crank sporting a 53 on a tandem. 110s with larger rings can be pretty flexy on some singles i've met. |
#5
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Changing chain rings
John Everett wrote: On 25 Feb 2006 11:36:47 -0800, wrote: As for how long to make the new chain, just put it on the new big chainring and around the biggest cassette cog, through the derailleur, and pull the chain as tight as possible so the rear derailleur is about as straight towards the crankset as possible. About that long or a link longer. Not "about that long", but a full link longer. No. You did not read what I wrote. If you actually thread the chain through the derailleurs and around the chainrings and pull it together, you will have the actual length. Period. If you add 1 full link extra as you suggest, you will be too long. Remember that the chain needs enough slack to climb over the teeth of the largest cog or ring without damaging the rear derailleur. See: http://sheldonbrown.com/derailer-adjustment.html#chain Don't follow Mr. Brown's suggestions. I have never understood why someone would recommend determining chain length by proxy instead of just putting the chain through the rear derailleur and around both rings and determining it directly. Maybe in a bike shop saving a minute is important. I like how Mr. Brown ends his paragraph with "In almost all cases, this will give the optimum length." Almost all cases? Why not just thread the chain on as it will be used on the bike and determine it correctly in all cases? jeverett3ATearthlinkDOTnet http://home.earthlink.net/~jeverett3 |
#6
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Changing chain rings
On 27 Feb 2006 15:45:11 -0800, wrote:
John Everett wrote: On 25 Feb 2006 11:36:47 -0800, wrote: As for how long to make the new chain, just put it on the new big chainring and around the biggest cassette cog, through the derailleur, and pull the chain as tight as possible so the rear derailleur is about as straight towards the crankset as possible. About that long or a link longer. Not "about that long", but a full link longer. No. You did not read what I wrote. If you actually thread the chain through the derailleurs and around the chainrings and pull it together, you will have the actual length. Period. If you add 1 full link extra as you suggest, you will be too long. Actually I did read what you wrote. I'm sure there are cases where doing it your way could result in a chain that's just long enough to be connected but will damage the rear derailleur as the chain climbs over the teeth on the first shift onto the large/large combination. jeverett3ATearthlinkDOTnet http://home.earthlink.net/~jeverett3 |
#7
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Changing chain rings
Dans le message de ,
John Everett a réfléchi, et puis a déclaré : On 27 Feb 2006 15:45:11 -0800, wrote: John Everett wrote: On 25 Feb 2006 11:36:47 -0800, wrote: As for how long to make the new chain, just put it on the new big chainring and around the biggest cassette cog, through the derailleur, and pull the chain as tight as possible so the rear derailleur is about as straight towards the crankset as possible. About that long or a link longer. Not "about that long", but a full link longer. No. You did not read what I wrote. If you actually thread the chain through the derailleurs and around the chainrings and pull it together, you will have the actual length. Period. If you add 1 full link extra as you suggest, you will be too long. Actually I did read what you wrote. I'm sure there are cases where doing it your way could result in a chain that's just long enough to be connected but will damage the rear derailleur as the chain climbs over the teeth on the first shift onto the large/large combination. You have but a single chainring ? -- Bonne route ! Sandy Verneuil-sur-Seine FR |
#8
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Changing chain rings
news news wrote: I would like to change my chain rings to a larger size. Currently, I have 48t, 36t, 26t triple set. I would like to change them to 53t, 43, 36 approximately. I'm looking for higher gears. This bicycle is a Cannondale tandem, and my stoker and I often run out of gears on the high end. what is the suggested number of chain links to add based upon the upgrade? TIA JONS GO TO A BIKE shop that deals with TA rings- Probably one to 2 links to add. |
#9
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Changing chain rings
Nate Knutson wrote: ---snip--- something i'm not sure about is how well it's going to work to have a 110/74 crank sporting a 53 on a tandem. 110s with larger rings can be pretty flexy on some singles i've met. ---/snip--- I imagine this depends upon the rings. Ritchey's old, yet highly regarded, road logics used this setup for a good long while (prior to the current design). SYJ |
#10
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Changing chain rings
On 28 Feb 2006 16:46:10 -0800, "SYJ" wrote:
I imagine this depends upon the rings. Ritchey's old, yet highly regarded, road logics used this setup for a good long while (prior to the current design). Specialized tandem cranksets were 110 x 74 bolt pattern and used 54/44/32 rings. The cranks, like the Ritcheys, were made by Sugino. |
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