RockyMounts AfterParty Bike Rack Overview 

Hello. We haven't seen that combo yet but we'll keep our eyes out for it.

Hello. That interface is 1/8 inch plate steel with M10 bolts, pretty robust, no worries here.

Probably will physically fit, but could be too much weight for the swing out pivot points. Though at capacity of 60lb for each bike, I bet having 3 20lb bikes wouldn't hurt much. Will void the warranty, though.