Best way to center sprocket ?

[ezrider]

Not cheap, but I think I found the ideal way to center a sprocket:

 

[Nate888]

Not cheap, but I think I found the ideal way to center a sprocket:

that's what I use & I can confirm it's centered every time, although you need wheels w/ big hubs that are strong enough

 

[KCvale]

that's what I use & I can confirm it's centered every time, although you need wheels w/ big hubs that are strong enough

Yep, the 'clam shell' mount is usually for a fat coaster brake or internal shifting hub, or something other than 36 spokes.
Just MAKE SURE it's tight around the hub, if it gets loose it will take out every spoke on the left hand side that will result in Catastrophic failure of the really UN-friendly nature.