I think the wave only has a 7' beam so those wheels wont work on most beach cats ... make sure you get wheels that fit your beam.. or you will have to add weight, expense (and a new and exciting way to bleed when you get your hand pinched by the extension).
If you get Wave Trax or something, just visit your local metal supply joint and pick up a new axle - pretty sure it is 2-inch aluminum tube. I used the Trax Mike Fahle sold me with a Mystere 4.3 for four or five boats, just swapping the axle to fit whatever boat I owned at the time. The Glasers have those Trax, now, and they just put tubes in.
