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Question on 2 sided fixed or fix/free hubs and chains(5 posts)

Question on 2 sided fixed or fix/free hubs and chainskilimanjaro
Jan 10, 2003 11:51 AM
I assume that when you flip the rear hub you need a different chain. Is that correct?
No...........Dave Hickey
Jan 10, 2003 12:48 PM
Same chain. If you're talking about chain length, that's why you have horizontal dropouts on your frame. 1 tooth of cog is approx 1/8" so if you go from a 15t cog to a 16t cog, the rear wheel will move forward approx. 1/8" in the dropouts.
Jan 10, 2003 3:36 PM
If you are using different sized cogs, set it up so that the chain is as short as it can be and still loop the larger cog; that way, you can still use the same length for the smaller cog, if the number of teeth difference isn't too much relative to the amount of adjustment in the dropouts.

re: Question on 2 sided fixed or fix/free hubs and chainsfixedgearhead
Jan 10, 2003 3:26 PM
Not so. The chain stays the same. It is 3/32 size as are both the fixed gear cog and the freewheel cog. The only thing that changes is the position of the axle in the rear drop out. And that only changes if the number of cogs is different between the two sides of the hub.

easy as pieDASS
Jan 11, 2003 4:19 PM
It's really simple. I carry a 'peanut butter wrench' when I ride the Fixie. I run a 42:16 most of the time. When I get to the base of a monster mountain, I stop, loosen track nuts, flip wheel, pull for chain tension, then tighten track nuts. The wheel only had to move 1/4" in the 1.5 long track horizontal dropouts. Remount, keep riding. No rear brake to adjust. I use a front brake.

I believe that's how they used to do it in the old school days of the Tour.