chain alignment
09-15-08 | 07:59 PM
#1
Thread Starter
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Joined: Sep 2008
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From: Salt Lake City, UT
Bikes: 72? Dolphin 250 Z, No name mountain bike built from the ground up with xtr, xt, and LX components
chain alignment
I've discovered a problem on my new road bike. I'm new to road bikes and new to vintage bikes so it's a double wammy. I've been riding it for a week now with no rear mech cable. I decided today it's to hard to ride up hills in my top gear so I bought after searching and scrounging I found a local place I can get classic cables. Now that I'm able to shift the rear when I shift the front the chain falls between the sprockets. Having to stop to fix this every time I downshift made slow progress home. Any ideas? Is my chain just to narrow?
09-15-08 | 08:12 PM
#2
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From: Puyallup Washington
Bikes: Motobecane Mirage fixed gear, Nashbar Alpha Road 5000, Bianchi Grizzly, Coppi Fiorelli, , Schwinn Trike, , GT All Terra, Old Peugeot, Nishiki 3 speed, Bugatti, Cannondale Black Lightning, Dura All, Bianchi Touring, Bridgestone T700 & more
Sounds to me like you need to adjust the derailleurs limit stops.......
https://sheldonbrown.com/derailer-adjustment.html
https://sheldonbrown.com/derailer-adjustment.html
09-16-08 | 01:12 PM
#4
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From: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
between the sprockets?
did you make sure the chainrings on the cranks are tightened down properly and that they are facing the correct direction?
did you make sure the chainrings on the cranks are tightened down properly and that they are facing the correct direction?
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
09-16-08 | 01:39 PM
#5
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From: yreka, ca
Bikes: like 15. my favorite a 1951 schwinn spitfire cruiser. also have a 1959 amf roadmaster, 1962 jch deluxe cruiser among others.
if chain is falling off the rear f/w or cass cogs, you need to adjust the low gear stop screw on the rear deraillur; you limit screws. falling off the rear when the front is shifted? check you front deraillur limit adj screws as well. bottom line, something is pulling the chain beyond its adjustment points, so check your limit adj screws.
09-16-08 | 02:16 PM
#6
Thread Starter
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From: Salt Lake City, UT
Bikes: 72? Dolphin 250 Z, No name mountain bike built from the ground up with xtr, xt, and LX components
the chain falls between the gears on the crank when I downshift from the large gear to the small one.
09-16-08 | 04:28 PM
#7
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From: Rhode Island (an obscure suburb of Connecticut)
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might be the wrong chain. Might be bent chainrings. Check the rings by measuring the distance to a spot pn the frame and rotating the crank. the ring should be the same distance from that spot all the way around.
09-16-08 | 05:59 PM
#8
www.theheadbadge.com
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What front crankset are you running?
What chain are you running? Is it a new replacement, and if so, was it a Shimano-compatible "9-speed" or "10-speed" chain?
Are the bolts that hold the chainrings to the crankset flush with the ring, or do they stick out?
-Kurt
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09-16-08 | 07:18 PM
#9
feros ferio
Joined: Jul 2000
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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;
What chainring combination are you using? The smaller the size difference, the narrower the horizontal spacing should be. You should be OK with any standard "8-speed" chain, such as an SRAM PC-58, but, as others mentioned, do avoid 9- or 10-speed chains.
Also, check the length of your chain. 24 half-links should measure no more than 12-1/16".
Also, check the length of your chain. 24 half-links should measure no more than 12-1/16".
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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
