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A flip flop hub question...(6 posts)

A flip flop hub question...Lone Gunman
Jun 27, 2002 4:21 PM
Lets say I go with the fix/ss hub. And I want to put a 17/18 sprocket on to get the gear range I want. How do you reset the chain tension for the smaller sprocket when you flip? Is there that much adjustment needed in the dropouts? I have plenty of room to adjust but not is the big cog pulls the axle too far forward to start with. Am I missing something here?
a 1 tooth diff is not that much...Spirito
Jun 27, 2002 6:02 PM
and should work fine. the 18 tooth will sit perhaps 1/8 to 1/4 in further forward on the drop outs at the most. assuming you have long older style drop outs with screws this isnt a problem. unbolt the wheel, flip it set it pulling the chain resonably taught, few tuns of the screws and you are ready to go.

keep in mind that chain tension is more crucial on the fixed cog side as its ok to have a little more slack that will result from not adjusting the drop out screws for the freewheel side and if its set a little forward.

just make sure you space well for a straight chainline the rest is more straightforward to adjust.
re: A flip flop hub question...Dave Hickey
Jun 28, 2002 3:28 AM
One tooth is 1/8". One link in a chain is about 1/2". I suggest setting up the 18T first. Make sure you have enough of the axle in the dropouts. As long as you have at least 1/8" space behind the axle, your 17t will fit fine.
The dropouts on my Gitane are 1 1/4" long.
Got 11/2" dropouts and no adjuster screws(nm)Lone Gunman
Jun 28, 2002 4:13 PM
Plenty of room in the dropouts for 1, may 2 tooth difference(nm)Dave Hickey
Jun 28, 2002 4:45 PM
With short horizontals....Ginz
Jun 28, 2002 5:24 AM
I have short horizontal dropouts and I do NOT have "1-tooth adjustibility". There are some gear combos where it's close -- when I go up or down a tooth the chain is a little too slack or the axel is just barely in the dropout. I should've gone for the long horizontals or the track forks.