I had the Kahunas in for a bit and they were uncomfortable as they were a bit too big for my riding style, so the Rizomas we're the perfect in-between for me compared to the Kuhunas and the OEM grips.Those are the prettiest. I just can't decide if that is the right size. 1 5/8 is clearly too big but fixes the pain. Somewhere between that and 1 1/4 but how to find out? I think I will ride the big ones through the winter and consider again in the summer.