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gearing question(8 posts)

gearing questionweiwentg
Jan 31, 2002 7:01 AM
I've got a 12-25 cassette, and a 11 tooth cog. I want to make a 11-25 cassette (the 11 is for the downhills). do I lose the 12 tooth cog? or which cog should I lose?
re: gearing questionChen2
Jan 31, 2002 7:17 AM
Assuming Shimano, you don't have a choice with what you've got according to your post. The smallest cog is unique, it needs to have a built-on spacer. You will need to replace the 12 with the 11.
-Al
re: gearing questiont
Jan 31, 2002 1:14 PM
Make sure you have a lock ring for an 11. The lock ring for the 12 will not work. The chain will hit the lock ring.
re: gearing questionChen2
Jan 31, 2002 1:55 PM
While we're at it, will the lock ring for a 12 work on a 13 with built-on spacer? I just bought a 13 and 16 for converting a 12-25 to a 13-25. It looks like the same lock ring will work, yes/no?
-Al
re: gearing questionSkunkWorks
Jan 31, 2002 9:11 PM
Yes it works
11 or 12, what's the big difference?Barnyard
Feb 1, 2002 7:30 AM
9%.NM
Feb 1, 2002 7:58 AM
In gear-inches itsMcAndrus
Feb 1, 2002 8:12 AM
If you do the gear inches using a 53 tooth chainring here is how it plays out.

Cog 13 - 107.7 inches
Cog 12 - 116.7 inches
Cog 11 - 127.3 inches

My biggest gear is the standard 53-12. The only time I would consider using an 11 is for long downhills or time trials. It hurts just thinking about it.