pic: Better Sprocket Assembly with AndyMark Parts

[Brandon Holley]

We are firmly in the live axle camp these days, as well as the timing belt camp so this is less of an issue for us. However, when were doing chain and sprocket with dead axle setups, eccentric sprockets WERE an issue for us as well.

I dont think we ever had issues with shearing bolts, but getting a nicely concentric wheel/sprocket combo is easier said than done. I think this is a good solution to the problem. For any one who uses a non-spring loaded tensioner setup (ie: a bolt pulling or pushing on the wheel assembly) think of the inefficiencies you could be experiencing with every rotation. To get a chain nice and tensioned all the time, you could be causing some serious binding when the sprocket passes its furthest-from-center point.


In regards to the sprockets slowly slipping over time, that is most definitely happening with plastic components involved in the wheel assembly. If you are using plastic wheels, or plastic hubs and you tighten them down nice and tight, over the course of the season the plastic material will creep. This could cause eccentricities down the road even with a concentric starting setup.

-Brando