Chain rubs big chain ring while in the small chain ring and smallest cog -

Chain rubs big chain ring while in the small chain ring and smallest cog

Last post 11-06-2009 1:02 PM by jdais. 6 replies.

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11-06-2009 8:58 AM

mboeving
Joined on 09-08-2009
Posts 5

Chain rubs big chain ring while in the small chain ring and smallest cog

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I'm building up a 2007 Soloist Team with SRAM Red. I installed the crankset (compact crank) and torqued it down as recommended. There is no play, and I am confident it is installed correctly. I installed the rear derailleur, chain and shifters and it shifts through the full range of the cassette (11-26). My problem is that while in the small chain ring and smallest cog (11t), the chain rubs the inside of the large chain ring. I'm assuming this isn’t normal?... any ideas? Thanks.

11-06-2009 9:08 AM In reply to

1406racer
Joined on 09-01-2008
Posts 592

Re: Chain rubs big chain ring while in the small chain ring and smallest cog

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mboeving:
I'm building up a 2007 Soloist Team with SRAM Red. I installed the crankset (compact crank) and torqued it down as recommended. There is no play, and I am confident it is installed correctly. I installed the rear derailleur, chain and shifters and it shifts through the full range of the cassette (11-26). My problem is that while in the small chain ring and smallest cog (11t), the chain rubs the inside of the large chain ring. I'm assuming this isn’t normal?... any ideas? Thanks.

That is a cross chain gear and should not be used because of excessive chain line anyway, so if the chain rubs the chainring (it is doing so probably due to its reduced diameter versus a standard ring) it is understandable.

11-06-2009 9:15 AM In reply to

nycebo
Joined on 10-09-2009
New York, NY
Posts 55

Re: Chain rubs big chain ring while in the small chain ring and smallest cog

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Agreed. Cross chaining should be avoided. Shift into the larger chainring and dump down a couple gears on the cassette.

11-06-2009 9:27 AM In reply to

mboeving
Joined on 09-08-2009
Posts 5

Re: Chain rubs big chain ring while in the small chain ring and smallest cog

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Thanks for the info. I definitely would never ride in those gears... just wanted to make sure I had everthing installed correctly. This is my first attempt at building my own bike so I'm learning a lot as I go.