15 tooth + double sprockets

Originally Posted by Ninja_Bait

Double strand is not the same as double sprocket. Double strand is meant for 35-2 chain, unlike the AndyMark-type double sprocket, which is meant for two separate loops of 35-1 chain. I don't think you can use the former as a substitute for the latter, because the separation between sprockets is too tight.

Yeah. Sorry for not clarifying. I need to know where I can get a +15 tooth double sprocket, not a double strand. My bad for not being clear.