Hello everyone, what kind of font is this ?

It's a representation of the 1960s Feeling Groovey kind of font. That was then fitted into the circle.
One of these may do the job for you: http://www.dafont.com/theme.php?cat=103&text=RIP+CURL+WET+SUITS
or one of these (if you have money) http://myfonts.us/td-TzlBWv

Thank you mate