I tried the 22X6/10 on my moki 2.1 which is in a GP patty wagstaff that wieghs 15 lbs. with a smoke system, it was really hard to slow the plane down enough to get it to land, it just wanted to sail right on by, so my opinion is that the braking kinda sucks, but if you use flaps to brake the plane, I guess the performance of the prop is Ok. I'm hoping to get a 23X8, but haven't found one yet.