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By Jevan Pipitone 2018. You can use or copy any of my material as long as you add a link to the web page http://www.jevan.com.au/
ther - Engineering
Cogs that have tires, the rubber tires rub against each other and cause
each cog to turn due to friction of the rubber. Has the advantage over
traditional cogs that the cog bumps don't have to line up exactly and
you can replace the tire if the cog gets old (or even the whole cog).
Just slip off and slip on a new one, brand new.