I put these--Rav X Fatty Barends--on my Trek 7.3 FX. I like them!

Just don't make the same mistake I made putting them on: You don't need to take your grips off before installing them. Just take a box cutter / razor blade and cut then end off the grip using the inside of your handlebar end as a guide. Just run the blade inside the bar and you can cut the end out of the grip very easily. MUCH easier than trying to muscle the grip off and then back on. But, as a side benefit, I now have forearms like Popeye!
Luckily I figured this little trick out before I put a set on my wife's 7.3!