If you want a cheap 22mm 36T bolt-on abec pattern wheel pulley, go with this guy. Comes with a free 275-5M-15 belt that’s probably the wrong size and a free 15T motor pulley that’s aluminum and not steel.
edit: nevermind, it’s out of stock and probably won’t ever be stocked again
edit2: I have 3 that have been machined into dual kegel/abec pulleys but I probably won’t sell them and 2 are in use
15mm belts on street are pretty pointless unless in single drive 
I suppose that’s a debate for another time, but they’re 13mm wideish
My newest single drive has been breaking the 15mm belts
I’ve got a set of abec bolt ons … 40t though 
nevermind.
Yea dual drive with 12mm is “”"“equivilent”"""" to 24mm single, obviously not quite but you get the point.
Yep for the most part until you hit a big bump with one side or until one side goes out and you’re limping home or if a belt breaks
But generally why use 12mm when you can use 15mm?
So much this 
rolling resistance, axle/hanger space for caliber IIs iirc some motors won’t fit with 15mm but will with 12, belt price is a little less, pulley price is a little less and there usually isn’t much of a lonengevity advantage because belts tend to break due to some event i.e a rock getting into the the system and snapping them rather than long term wear