Chain ring differences

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Chain ring differences

Postby Stl_Greaser » Tue May 07, 2013 9:13 pm

How much of a difference is there between a 8 speed and 9 speed crank/chain ring? I may have a good deal on a upgrade crank for my bike but will a 9 speed crank/chain ring work on my 8 speed bike?
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Re: Chain ring differences

Postby schwim » Tue May 07, 2013 9:33 pm

I've been riding an 8 speed bike with a 9 speed Race Face crank for a while now. No issues at all. My research pointed towards 8-9 being interchangeable while 9-10 could cause issue. This was due to chain width. 10 speed chain width was not compatible with 9 speed hard parts, but 8 speed components work well with a 9 speed chain. My experience has reflected this.
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Re: Chain ring differences

Postby Stl_Greaser » Tue May 07, 2013 9:50 pm

So would I need to buy a 9 speed chain or use my existing 8 speed chain. I will have an 8 speed cassette and derailers...
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Re: Chain ring differences

Postby gar29 » Wed May 08, 2013 12:51 am

schwim wrote:I've been riding an 8 speed bike with a 9 speed Race Face crank for a while now. No issues at all. My research pointed towards 8-9 being interchangeable while 9-10 could cause issue. This was due to chain width. 10 speed chain width was not compatible with 9 speed hard parts, but 8 speed components work well with a 9 speed chain. My experience has reflected this.

I've heard the same thing. Haven't tried it personally though, so you can take that with a grain of salt.
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"Life is like riding a bicycle. To keep your balance you must keep moving"
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Re: Chain ring differences

Postby schwim » Wed May 08, 2013 7:18 am

I did not swap out my chain, STI, just replaced the cranks/CR's. My cassette, front and rear derailleurs and chain are all from my 8 spd setup.
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Re: Chain ring differences

Postby Stl_Greaser » Wed May 08, 2013 7:16 pm

Okay cool, thanks for the info!
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