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#1
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Upgrade a Lemond Poprad
I have a Lemond Poprad coming sight unseen. I want to convert it into a pure
touring bike with a triple, a 32 or 34 cog in the back and also add brifters to replace the bar end shifters. Currently, it is a 9-speed 12-25 with doubles up front with the Sora dr package. What do I have to do/buy for the drivetrain to make this a "world tourer" able to leap tall buildings (or at least get over anything short of the Alp d'Huez) loaded down with panniers and a not-so-light rider (225 lbs)? |
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#2
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Well I have done something like this for a customer once before.
For him I used a Shimano XT SGS R der. because of the necessary chain wrap capacity. Beyond that I installed an XT Cassette for the customer. If you want to ride a significant amount I would probably recommend an upgrade on your other component if the balance of your parts is Sora. Sora is designed for light recreational road riding. I have seen commuting customers of mine that purchased bikes equipped with Sora come back to me after a year of hard riding with the pieces just sloppy. So as a final list this is what I would get if I were going to make this into a great tourer. Shifters: Shimano Ultegra (105 if cash is a problem) R Der: Shimano XT SGS (this is the long cage version) F der: Shimano 105 Cassette: Shim XT ( there isn't much cost diff. between XT and LX) Chain: you will have to replace your chain as yours will not be long enough. For my customer I had to add a link or two to even a new chain if my memory serves me right. But I am a big fan of the Sram PC-69 chain. Crank: TruVativ is doing some good things with their cranksets I would look into that as they are a little cheaper but of similar quality specifically the chainrings themselves. Josh McClure. Durst Cycles |
#3
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Josh, thanks so much for these details. The bike should be here next week
and I'll see what I've got to work with. I'm pretty sure it's Sora equipped so I'll go the Deore XT route for the r der, they seem pretty reasonable in price. Any problem with the BB or with clearance going from two to three rings? "Josh McClure" wrote in message ups.com... Well I have done something like this for a customer once before. For him I used a Shimano XT SGS R der. because of the necessary chain wrap capacity. Beyond that I installed an XT Cassette for the customer. If you want to ride a significant amount I would probably recommend an upgrade on your other component if the balance of your parts is Sora. Sora is designed for light recreational road riding. I have seen commuting customers of mine that purchased bikes equipped with Sora come back to me after a year of hard riding with the pieces just sloppy. So as a final list this is what I would get if I were going to make this into a great tourer. Shifters: Shimano Ultegra (105 if cash is a problem) R Der: Shimano XT SGS (this is the long cage version) F der: Shimano 105 Cassette: Shim XT ( there isn't much cost diff. between XT and LX) Chain: you will have to replace your chain as yours will not be long enough. For my customer I had to add a link or two to even a new chain if my memory serves me right. But I am a big fan of the Sram PC-69 chain. Crank: TruVativ is doing some good things with their cranksets I would look into that as they are a little cheaper but of similar quality specifically the chainrings themselves. Josh McClure. Durst Cycles |
#4
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If the bike currently has only a double, which would make sense if it
was a cyclocross bike, then there are more than a few things that have to be changed to make it into a 3 ring bike. the first and biggest is obviously a new crank, unless they send you a crank that has the holes for a third ring. If you do have to replace the crank you will also have to replace the BB. Also if the bike is a double the F der will be for a double as well. so that will have to be changed. And once again you will need to replace the R der. An inportant note on this change is you have to be certain that the chainwrap will not exceed the rear derailler's capacities and the width of the front deraileur capacity All Shimano Front Deraillers have a listed capacity of 22T although the new 10sp stuff must have a listing of 23t because there is a 53-39-30 set. That being said, I have installed a 24t differential (52-40-28) without problem. Front derailer width is calculated by (largest chainring - smallest chainring) As Rear deraileurs go, all SGS model Deraillers above Deore have a listed capacity of 43 (XTR,XT and LX have a capacity of 45) all GS model Derailers have a listed capacity of 37 and all SS model derailers have a listed capacity of 29 These figures like those of the F Der can be safely exceeded by 1 or 2 links Chain wrap capacity can be calculated (Largest (front) chainring - smallest (front) chainring) + (largest (rear) cog - smallest (rear) cog) = chainwrap. So just do you calculations before you purchase anything and Have fun riding. Josh McClure |
#5
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Bike arrived and is in pretty good shape. I will need to replace the front
rim which is a 700c Mavic Aurora 32 hole. I haven't found a duplicate rim, wheel or wheelset and wondering what would be similar. What would be good (and preferably cheap as I'll probably have to get a pair) to either handle a touring configuration or take the rigors of cyclocross. The Aurora's are double walled and look to have fairly beefy spokes. "JJ" wrote in message news:natVd.65641$Dc.35342@trnddc06... Josh, thanks so much for these details. The bike should be here next week and I'll see what I've got to work with. I'm pretty sure it's Sora equipped so I'll go the Deore XT route for the r der, they seem pretty reasonable in price. Any problem with the BB or with clearance going from two to three rings? "Josh McClure" wrote in message ups.com... Well I have done something like this for a customer once before. For him I used a Shimano XT SGS R der. because of the necessary chain wrap capacity. Beyond that I installed an XT Cassette for the customer. If you want to ride a significant amount I would probably recommend an upgrade on your other component if the balance of your parts is Sora. Sora is designed for light recreational road riding. I have seen commuting customers of mine that purchased bikes equipped with Sora come back to me after a year of hard riding with the pieces just sloppy. So as a final list this is what I would get if I were going to make this into a great tourer. Shifters: Shimano Ultegra (105 if cash is a problem) R Der: Shimano XT SGS (this is the long cage version) F der: Shimano 105 Cassette: Shim XT ( there isn't much cost diff. between XT and LX) Chain: you will have to replace your chain as yours will not be long enough. For my customer I had to add a link or two to even a new chain if my memory serves me right. But I am a big fan of the Sram PC-69 chain. Crank: TruVativ is doing some good things with their cranksets I would look into that as they are a little cheaper but of similar quality specifically the chainrings themselves. Josh McClure. Durst Cycles |
#6
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On Wed, 09 Mar 2005 21:38:41 GMT, "JJ"
wrote: Bike arrived and is in pretty good shape. I will need to replace the front rim which is a 700c Mavic Aurora 32 hole. I haven't found a duplicate rim, wheel or wheelset and wondering what would be similar. What would be good (and preferably cheap as I'll probably have to get a pair) to either handle a touring configuration or take the rigors of cyclocross. The Aurora's are double walled and look to have fairly beefy spokes. Would another Matrix Aurora work? I think they are still available through Trek dealers. |
#7
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"dianne_1234" wrote in message ... On Wed, 09 Mar 2005 21:38:41 GMT, "JJ" wrote: Bike arrived and is in pretty good shape. I will need to replace the front rim which is a 700c Mavic Aurora 32 hole. I haven't found a duplicate rim, wheel or wheelset and wondering what would be similar. What would be good (and preferably cheap as I'll probably have to get a pair) to either handle a touring configuration or take the rigors of cyclocross. The Aurora's are double walled and look to have fairly beefy spokes. Would another Matrix Aurora work? I think they are still available through Trek dealers. I was looking for something used with no success, but good idea, I'll price some out if they're still available. Thanks! |
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