pic: Offseason Gearbox

[Abhishek R]

Originally Posted by Chris is me

The other important caveat here is that your chain and sprocket should be constrained by the tube itself for this to work (very close to inner walls of tubing). One of the reasons chain in tube seems to work so well is that there is nowhere for the chain to go when it does stretch, preventing the jumping problems found with looser chains.

Yeah, that's pretty much a requirement too, thanks for clarifying. There's literally nowhere for the chain to go, so as long as it doesn't break you're good.