16T/14T Cog Flip Flop Hub Chain Length Question
03-30-10, 12:23 PM
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16T/14T Cog Flip Flop Hub Chain Length Question
I've got a fixed/fixed flip flop hub on my rear rim. Currently I'm running a 46T Chainring and a 16T cog, and I'm about 1/4" from the end of my horizontal dropout (NOT track dropout). To be clear, I can push the rear hub away from the chainring another 1/4" before I hit the end of the dropout.
That being made clear, does anyone hear think that I would be okay running a 14T cog on the other side of my hub, and be able to keep the chain tight enough within that 1/4" space I have right now. Basically, can I run 14T cog and 46T chainring without having to take out any links in my chain, and just move it back up to a 1/4"?
I'd hate to go out and buy the lockring and cog just to find out I can't do it.
That being made clear, does anyone hear think that I would be okay running a 14T cog on the other side of my hub, and be able to keep the chain tight enough within that 1/4" space I have right now. Basically, can I run 14T cog and 46T chainring without having to take out any links in my chain, and just move it back up to a 1/4"?
I'd hate to go out and buy the lockring and cog just to find out I can't do it.
03-30-10, 12:35 PM
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Yes, but just barely. For every tooth that you subtrack from the cog, the axle will move about 1/8 inch.
03-30-10, 12:37 PM
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Oh jesus. Well, that's a handle bit of information to know. Thanks man. I guess I will try it out.
03-30-10, 12:47 PM
#4
Bicycle Repair Man !!!
How much forward movement is left in the dropout ?
You will need a little more than 1/4 inch as when that chain wears it will need to be tightened just a little and you will need this adjustment space.
If you can shorten your chain by a pair of links and still have the wheel sitting properly with the 16 tooth then fitting the 14 will be no problem... as long as the nut does not pass the front limit of the dropout you will be good.
Most road bikes will allow for a 3 tooth change in the dropout unless they are the half length versions and some older dropouts will allow for even more cog variance.
You will need a little more than 1/4 inch as when that chain wears it will need to be tightened just a little and you will need this adjustment space.
If you can shorten your chain by a pair of links and still have the wheel sitting properly with the 16 tooth then fitting the 14 will be no problem... as long as the nut does not pass the front limit of the dropout you will be good.
Most road bikes will allow for a 3 tooth change in the dropout unless they are the half length versions and some older dropouts will allow for even more cog variance.
