Ah, I see them now. Comp makes them in 1.7 but they are only roller tip. My previous search ruled them out because I had specified full roller. They do make a full roller 1.6, they would be mostly pointless. The majority of the HP gain from rockers comes from the higher ratio, not decreased friction. If I get really bored I might try the 1.7 roller tips one day. Better yet I may just hold off and get some good heads.