7-9 speed compatibility
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7-9 speed compatibility
I have a bike in need of a new crankset and cassette. The bike is currently a 7 speed. I am upgrading to a 8 speed cassette since I know the chain can handle it, but I also wanted to uy a new crankset. The crankset I want to buy says 9-speed. Any problems using a 9-speed crankset with a 8-speed chain?
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Shimano I presume? Go to Sheldon Brown's website and look for compatibility issues.
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yes, shimano. I've been all over sheldon's website -I can never find a darned thing there. His links for cranks are very light on info. I can't find anything on compatibility at all.
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Originally Posted by aikigreg
yes, shimano. I've been all over sheldon's website -I can never find a darned thing there. His links for cranks are very light on info. I can't find anything on compatibility at all.
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Originally Posted by aikigreg
I have a bike in need of a new crankset and cassette. The bike is currently a 7 speed. I am upgrading to a 8 speed cassette since I know the chain can handle it, but I also wanted to uy a new crankset. The crankset I want to buy says 9-speed. Any problems using a 9-speed crankset with a 8-speed chain?
#6
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Originally Posted by aikigreg
I have a bike in need of a new crankset and cassette. The bike is currently a 7 speed. I am upgrading to a 8 speed cassette since I know the chain can handle it, but I also wanted to uy a new crankset. The crankset I want to buy says 9-speed. Any problems using a 9-speed crankset with a 8-speed chain?
As far as Campy or Shimano goes 5-9 sp cranks are really the same. Most, but not all, 5-7 sp cranks aren't ramped or don't have the pins. These were designed to aid in moving the narrower 9 sp chain. Most 10 sp specific cranks have the chainrings closer in addition to being ramped and pinned.
Good luck
Tim
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sheldon brown's article on shimano compatibility
Here's what you want. For chainrings, the width/thickness for different speeds are the same as the cassette sprockets in his table. You will notice a shifting difference if you try to run a narrower chain than chainwheel, eg. a 9 speed chain on an 8 speed chainwheel. Not so much the other way around. The crankset is not important, the rings are.
Here's what you want. For chainrings, the width/thickness for different speeds are the same as the cassette sprockets in his table. You will notice a shifting difference if you try to run a narrower chain than chainwheel, eg. a 9 speed chain on an 8 speed chainwheel. Not so much the other way around. The crankset is not important, the rings are.
Last edited by vpiuva; 02-25-07 at 08:39 AM.
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If you are going to change the cassette, by all means change the chain too. Going to 8-speed instead of 9, just because your current chain will work is the wrong kind of economy.
Chains wear quickly and a new cassette with a worn chain is a sure recipe for skipping. The chain is the least expensive component available. Get a new one.
Chains wear quickly and a new cassette with a worn chain is a sure recipe for skipping. The chain is the least expensive component available. Get a new one.
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Thanks y'all! That link was just what I needed, Vpiuva.
Hillrider - it's a recumbent and a brand new chain, so I don't feel like spending the $$$ to chain that as well, and am not bothered by 9 or 8 speed, but since I'm buying new stuff anyway I figured I'd try and squeeze a bit extra hillclimbing ability into it.
Hillrider - it's a recumbent and a brand new chain, so I don't feel like spending the $$$ to chain that as well, and am not bothered by 9 or 8 speed, but since I'm buying new stuff anyway I figured I'd try and squeeze a bit extra hillclimbing ability into it.