The Rattlebars will work with the Fish, duckfoot one and the Big Bike one; you've just got to be careful with your heel when you put it down. Easy to catch the shifter instead. You learn to turn your foot away from the bike more so as to miss the shifter. I've only missed one time; east to get used to. I hesistated buying the Rattlebars for a year because they weren't chromed and I thought the heel peg looked too high-then they chromed them. I WASTED A YEAR OF GREAT PERFORMANCE! Those things are great. And as a bonus, I can put my foot down behind the shifter close to the bike-something I couldn't do with the large boards if I had gotten them.