make a modern cog work with a skip chain

[karfer67]

i have seen a few people ask this and thought i would post how i do it. a lot of you want to use a skip front sprocket, and chain but either dont have a good rear wheel, or want to use a modern hub like a nexus3 or 7 speed. all you need is to remove the rear cog, make sure it has an even # of teeth and grind off every other tooth. i use a bench grinder to do this as i have more control. i start by grinding each tooth down in a rough cut. then come back and carefully profile the area in between so it has a nice smooth radius. thats all there is to it see that was not so hard huh? :mrgreen:

 

[karfer67]

just realized i typed with rather that work in the tittle. oops i stand corrected

 

[ifitsfreeitsforme]

is there a difference in the thickness of the old skip tooth cogs and the more modern non-skiptooth cogs, and if so does it matter? I'm guessing it doesn't matter since it sounds like you do this regularly.

thanks for the idea.

 

[karfer67]

yes the modern cogs are more narrow but i have never had any issues using the wider skip chain on them.

 

[ifitsfreeitsforme]

thanx

 

[chimichanga]

I wonder if its possible to do the same thing with a new chainring?

 

[sensor]

yes it is(dont know about with a skip chain though)with a 1/2" pitch chain....i did that with the kids build off bike