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#1
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Upgrading Custom Paramount OS....
I have a Paramount OS that was made for me in 1991. The frame is in great
shape. I am trying to understand if it is possible to upgrade to integrated brake levers/shifters from shifters on the tube. I don't necessarily want to buy all new Dura stuff, too $$$. My bike has a mixture of Dura-Ace and Ult.600 with a seven speed cassette. I have been told Shimano makes the equipment to accommodate the 7 speed cassette, but it is not of the highest quality components. I think it is called Sora. I have also been told that it is possible to spread the stays (not permanently) in the back to accommodate a wheelset that would normally fit a bike with a 130mm spread and therefore a 10 speed cassette. Mine is spaced at 125mm. Getting a new wheelset seems the best stratedgy, but does it really work? Any thoughts or questions would be great! Alan |
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#2
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Upgrading Custom Paramount OS....
On Wed, 24 Aug 2005 18:36:30 +0000, Alan wrote:
I have a Paramount OS that was made for me in 1991. The frame is in great shape. I am trying to understand if it is possible to upgrade to integrated brake levers/shifters from shifters on the tube. I don't necessarily want to buy all new Dura stuff, too $$$. My bike has a mixture of Dura-Ace and Ult.600 with a seven speed cassette. I have been told Shimano makes the equipment to accommodate the 7 speed cassette, but it is not of the highest quality components. I think it is called Sora. I'd go with 105 or better, not Sora. The thumb levers are not easy to use from the drops, so I have heard. You won't regret changing from downtube shifters. I have also been told that it is possible to spread the stays (not permanently) in the back to accommodate a wheelset that would normally fit a bike with a 130mm spread and therefore a 10 speed cassette. Mine is spaced at 125mm. Getting a new wheelset seems the best stratedgy, but does it really work? Why not spread them permanently? It's a steel frame, it can be done. But for only 5mm I'd just push the 130mm wheel in there. You don't need a new "wheelset", you need a rear wheel. Or, if you want to rebuild it yourself, a rear hub. -- David L. Johnson __o | Anyone who is capable of getting themselves made President _`\(,_ | should non no account be allowed to do the job. -- Doug Adams (_)/ (_) | |
#3
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Upgrading Custom Paramount OS....
Thanks for the quick bounce back.
Will I have to change other components (front/rear derailleur, chain and rings) to use a thinner chain? Also, is it diffcult to drop the new wheel/tire in place should I flat out when out riding? Alan "David L. Johnson" wrote in message news On Wed, 24 Aug 2005 18:36:30 +0000, Alan wrote: I have a Paramount OS that was made for me in 1991. The frame is in great shape. I am trying to understand if it is possible to upgrade to integrated brake levers/shifters from shifters on the tube. I don't necessarily want to buy all new Dura stuff, too $$$. My bike has a mixture of Dura-Ace and Ult.600 with a seven speed cassette. I have been told Shimano makes the equipment to accommodate the 7 speed cassette, but it is not of the highest quality components. I think it is called Sora. I'd go with 105 or better, not Sora. The thumb levers are not easy to use from the drops, so I have heard. You won't regret changing from downtube shifters. I have also been told that it is possible to spread the stays (not permanently) in the back to accommodate a wheelset that would normally fit a bike with a 130mm spread and therefore a 10 speed cassette. Mine is spaced at 125mm. Getting a new wheelset seems the best stratedgy, but does it really work? Why not spread them permanently? It's a steel frame, it can be done. But for only 5mm I'd just push the 130mm wheel in there. You don't need a new "wheelset", you need a rear wheel. Or, if you want to rebuild it yourself, a rear hub. -- David L. Johnson __o | Anyone who is capable of getting themselves made President _`\(,_ | should non no account be allowed to do the job. -- Doug Adams (_)/ (_) | |
#4
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Upgrading Custom Paramount OS....
On Wed, 24 Aug 2005 19:24:25 +0000, Alan wrote:
Thanks for the quick bounce back. Will I have to change other components (front/rear derailleur, chain and rings) to use a thinner chain? Also, is it diffcult to drop the new wheel/tire in place should I flat out when out riding? I'm not sure about the derailleurs. The front should be OK, but the rear may or may not be, and it may or may not be able to even shift across a 9 or 10-speed cassette. Best way to find out is to try it. That will also let you know whether just squeezing the wheel in will make it too hard to remove (I doubt that, though). -- David L. Johnson __o | Do not worry about your difficulties in mathematics, I can _`\(,_ | assure you that mine are all greater. -- A. Einstein (_)/ (_) | |
#5
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Upgrading Custom Paramount OS....
Once again, thank you.
"David L. Johnson" wrote in message news On Wed, 24 Aug 2005 19:24:25 +0000, Alan wrote: Thanks for the quick bounce back. Will I have to change other components (front/rear derailleur, chain and rings) to use a thinner chain? Also, is it diffcult to drop the new wheel/tire in place should I flat out when out riding? I'm not sure about the derailleurs. The front should be OK, but the rear may or may not be, and it may or may not be able to even shift across a 9 or 10-speed cassette. Best way to find out is to try it. That will also let you know whether just squeezing the wheel in will make it too hard to remove (I doubt that, though). -- David L. Johnson __o | Do not worry about your difficulties in mathematics, I can _`\(,_ | assure you that mine are all greater. -- A. Einstein (_)/ (_) | |
#6
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Upgrading Custom Paramount OS....
On Wed, 24 Aug 2005 19:24:25 GMT, "Alan"
wrote: Thanks for the quick bounce back. Will I have to change other components (front/rear derailleur, chain and rings) to use a thinner chain? Also, is it diffcult to drop the new wheel/tire in place should I flat out when out riding? You will need a new chain, but front and rear derailleurs should work, unless there's some specific Dura Ace incompatibility somewhere (DA, being the semi-experimental high-end group, sometimes gets stuff that doesn't get promulgated to lower groups if there's a problem with it. Most of the rest of Shimano is very nearly mix'n'match.). In many Shimano rear wheels, you can change out the freehub body to an 8/9/10 speed one, put in a slightly longer axle, and you wouldn't have to rebuild the wheel. Whether or not that works with yours depends on exactly what kind of DA/Ult it is (and I'll have to leave that to the experts once you dig out that information). Either way, a new rear wheel with Ultegra hub and Open Pro or Aerohead OC rim and 32 or 36 spokes should cost $150, so might be worth it. Pushing a 130 mm rear wheel into a 126 mm set of dropouts takes a bit of force, but you can try it out and see if it's more than you're willing to live with. If it's not, a steel frame can be cold-set (or, in other slightly scarier words, bent) easily to become 130 mm spacing instead of 126. There's a recent thread a bit upwards with one paranoid android who insists that his steel frame is too fragile to respace and about one or two dozen experts telling him at length why it's perfectly safe for him -- that'll give you a fairly correct flavour of whether or not it's a good idea. Jasper |
#7
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Upgrading Custom Paramount OS....
Alan Wrote: Once again, thank you. "David L. Johnson" wrote in message news On Wed, 24 Aug 2005 19:24:25 +0000, Alan wrote: Thanks for the quick bounce back. Will I have to change other components (front/rear derailleur, chain and rings) to use a thinner chain? Also, is it diffcult to drop the new wheel/tire in place should I flat out when out riding? I'm not sure about the derailleurs. The front should be OK, but the rear may or may not be, and it may or may not be able to even shift across a 9 or 10-speed cassette. Best way to find out is to try it. That will also let you know whether just squeezing the wheel in will make it too hard to remove (I doubt that, though). -- David L. Johnson __o | Do not worry about your difficulties in mathematics, I can _`\(,_ | assure you that mine are all greater. -- A. Einstein (_)/ (_) | http://sheldonbrown.com/frame-spacing.html & http://sheldonbrown.com/k7.html are two articles you should read. -- daveornee |
#8
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Upgrading Custom Paramount OS....
I put the 7 speed sti shifters on an older bike and they work quite
well. (Much better than I thought they would since they're cheap). You could also put on an older set of Dura-Ace or Ultegra 8 speed sti shifters which will work with the 7 speed cassette. These could be found used easily. Those are the cheaper options than moving to 9 or 10 speed. Mike |
#9
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Upgrading Custom Paramount OS....
snippage of Alan's Q's
You sure are lucky you don't have a Holdsworth with hardened campy dropouts - they can't be respaced 'cuz as the crystalline structure of the steel ages the very act of respacing the rear triangle will induce a latent failure by which the whole time space continuum will be destroyed when you try to ride it. Whew! Sure glad we're all safe. App |
#10
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Upgrading Custom Paramount OS....
Alan wrote: I have a Paramount OS that was made for me in 1991. The frame is in great shape. I am trying to understand if it is possible to upgrade to integrated brake levers/shifters from shifters on the tube. I don't necessarily want to buy all new Dura stuff, too $$$. My bike has a mixture of Dura-Ace and Ult.600 with a seven speed cassette. I have been told Shimano makes the equipment to accommodate the 7 speed cassette, but it is not of the highest quality components. I think it is called Sora. I have also been told that it is possible to spread the stays (not permanently) in the back to accommodate a wheelset that would normally fit a bike with a 130mm spread and therefore a 10 speed cassette. Mine is spaced at 125mm. Getting a new wheelset seems the best stratedgy, but does it really work? Yes, a competent bike shop can 'coldset' your rear triangle to 130mm and yes you can upgrade to shimano(not best) or to Campagnolo lever mou8nted shifting. Any thoughts or questions would be great! Alan |
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