Last question on 6 to 7 speed conversion
06-26-14 | 07:09 AM
#1
Thread Starter
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From: Onalaska, WI / Clearwater, FL
Bikes: Trek Madone 5.2, Kona Dew, Centurion Dave Scott Ironman
Last question on 6 to 7 speed conversion
Thanks to all the help here, nearly figured this conversion out. Will use a new Shimano 7 spd freewheel with washer if needed and a new SRAM or Shimano chain. Last issue is the downtube shifters, To double check: found a pair of NOS 7 speed shifters on Ebay. Ad says they don't have bolts etc. I should be able to use the bolts etc from my 6 speed SIS, correct?
Shimano Light Action SL A500 7 s Downtube Shifters New Indexed or Friction | eBay
Shimano Light Action SL A500 7 s Downtube Shifters New Indexed or Friction | eBay
06-26-14 | 07:18 AM
#2
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From: Rochester, NY
Bikes: 1962 Carlton Franco-Suisse Custom,1968 Raleigh DL-1/Tourist, 1971 Holdsworth Professional, 1973 Holdsworth Mistral,1973 Raleigh Gran Sport,1974 Raleigh Grand Prix, 1993 Trek 2200 Composite, 2011 Trek 7.3FX
i know with friction you shouldn't have a problem converting from 6 to 7, not sure on the bolt though, im sure somebody here can answer your question
06-26-14 | 10:23 AM
#3
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From: Onalaska, WI / Clearwater, FL
Bikes: Trek Madone 5.2, Kona Dew, Centurion Dave Scott Ironman
07-01-14 | 05:29 PM
#4
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From: Onalaska, WI / Clearwater, FL
Bikes: Trek Madone 5.2, Kona Dew, Centurion Dave Scott Ironman
Anybody? Local resources for this just don't exist, so I really need to find a way to save my 4 days younger than 60 yr old knees if I want to do the local hills (and I do) . Thanks!
07-01-14 | 06:08 PM
#6
Bianchi Goddess
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From: Shady Pines Retirement Fort Wayne, In
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I agree they should work, I think I have a bike around here with a look cleat screw/bolt holding the right shifter on.
If you didn't buy the chain yet checkout KMC, nice chains and may save you a few bucks.
If you didn't buy the chain yet checkout KMC, nice chains and may save you a few bucks.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
07-01-14 | 06:40 PM
#7
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From: Onalaska, WI / Clearwater, FL
Bikes: Trek Madone 5.2, Kona Dew, Centurion Dave Scott Ironman
Thank you both! Yep, downtube, and I am definitely considering a KMC chain . . .will probably go that route asap.
07-01-14 | 08:09 PM
#9
feros ferio
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From: www.ci.encinitas.ca.us
Bikes: 1959 Capo Modell Campagnolo; 1960 Capo Sieger (2); 1962 Carlton Franco Suisse; 1970 Peugeot UO-8; 1982 Bianchi Campione d'Italia; 1988 Schwinn Project KOM-10;
Make sure the shifters come with at least all of the basic mounting boss fittings, which can be hard to find. Suitable metric bolts should be pretty easy to scrounge -- even my local ACE Hardware has them.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
07-01-14 | 10:18 PM
#10
Ride, Wrench, Swap, Race
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From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
KMC chains are great quality at the "X" series level.
Their Z-series chains work fine but are really low-end chains as far as manufacturing precision; ...actually hard to measure chain wear with these because there is so much link-to-link pitch variance!
One more thing is that any Shimano "Light Action" shifters should be used with corresponding "Light Action" derailers, since the helper spring in the shifter is better balanced against the return spring in the derailer. I've seen problems with mis-matched parts of this type, but have no idea if the OP's shifters are just 105 shifters or might possibly be a Light Action model.
Their Z-series chains work fine but are really low-end chains as far as manufacturing precision; ...actually hard to measure chain wear with these because there is so much link-to-link pitch variance!
One more thing is that any Shimano "Light Action" shifters should be used with corresponding "Light Action" derailers, since the helper spring in the shifter is better balanced against the return spring in the derailer. I've seen problems with mis-matched parts of this type, but have no idea if the OP's shifters are just 105 shifters or might possibly be a Light Action model.
Last edited by dddd; 07-01-14 at 10:22 PM.
