Bike Forums - View Single Post - Surly track cog & chainline problem ?

09-26-04 | 12:37 PM

#9

Econoline

Member

Joined: May 2004

Posts: 48

Likes: 1

From: Ventura, CA

Bikes: eleven and going down

Quote:

Originally Posted by 46x17

Here is a good source on cog widths and chainlines. http://www.sheldonbrown.com/chainline/
The EAI cog is almost 2mm wider than the surly.

Thanks, I believe that explains it exactly. The "Chainline (From shoulder)" measurement according to Sheldon is 5.25mm for the Surly cog, compared to 7.96mm for an ACS freewheel. So 7.96 - 5.25 = 2.71mm, which is just about the 3mm I'm off by. I'll use some BB spacers as suggested to get things symmetrical on the flip-flop.

Thanks for all the good ideas guys.

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