
Cool UK cover.
Easyrider mag debuts in 1971, actively attempting to create and corner a nationwide niche of bada$$ magazine to make money. It included choppers, parties, naked women, and comic strips and fiction.
Choppers Magazine (1967-1971) featured the bikes and comics, although the comics were not as bawdy they did feature a 'dirtier' side of motorcycling. Choppers Magazine was started by Ed Roth and included his own skewed look at motorcycles.
Colors was out in 1971 as well, although I can't decide if predates or is a peer to Easyrider. Colors had a much smaller distribution number and more limited run.
SuperCYcle was around in the late 60s I believe> I can only find the cover shots of blondes curled up on the choppers. I don't know what was happening in its pages. It ran as competition for Easyrider for a while.
There has to be something before Easyrider. I don't know why, but I think that there was.