I think the Invo's are directional as they have different compounds in different sections. The overall height is pretty close, 26.2". Mine are 26.3" rear and 25.6" front and no problems with the VDC, still fully functional.
I'm going to take some pics today of the mounted tire so you can see the curve and contact patch. I went to yesterday but my camera battery was dead.
Pics.
Rear contact patch. Notice how the sidewalls are pulled in slightly, so the contact patch isn't a full 305 that it would be on a larger rim. The upside is that the tires might last longer before they cord in a camber limited environment.
Front contact patch. Much better here, nearly a full patch.
Rim bulge from behind.
View from top of rear fender.
View of fender rear well.
