Display MoreTo be honest most people avoid having a 22" rear since it requires you to run tires with almost no sidewall.
Big wheels are good for show bikes that get very light or no use but are very impractical in the real world, low sidewall means even the smallest of pot hole can damage your rim also the vehicles will run very rough due to the lack of sidewall.
Unless you are really into big wheels/tires, I would stick with stock size and just get some cool custom wheel/tires in stock size 18/20 that way, make sure you rear rim is a 10.5 that way the sky is the limit as far picking tires in the future.
your rear can be 305/30/20 , 315/30/20 , 295/30/20 all less than 1% difference in circumference so none will trigger the evil warning lights nor will they make the speedo even more off than it is.
DONE. Thank you, that was REALLY helpful! No show Slingshot here, I had a show motorcycle a while back and vowed next ride I would ride it for fun, not show