Two strands of #25 fit side-by-side inside a standard "1x2"x.125" wall tube.
We use 17 tooth double sprockets inside of our
SimpleTube Chassis.
You cannot have any drop in this setup because of clearance around the chain.
Otherwise the system is great and is a nice volume save. FRC118 used this same setup for 2013 with zero failures and maintenance issues.
