I have an 03 WR 450. Done all the free mods years ago. I got into dune riding lately. I found a good deal on a 19" rim, so I got it and put on a 8 paddle tire (instead of the 18" stock). Should it make a big difference, either postive or negative, in sustainable power when climbing big dunes by having a 19" wheel? My bike seems to lose power heading up big dunes quicker than my buddies who ride a YZ 450, KTM 525, KTM 450, and Honda 450. I guess that doesn't surprise me a lot. But, I borrowed a 18" rim and paddle the first time I went to the dunes, and it seems like I had more sustained power going up big dunes. Who knows--it could be just me. Would the 19" rim vs 18" rim make a noticeable difference?