As one of the previous owners of the tucker with the grouser extenteders,I just don't see where it would be necessary. I had that cat in powder over the tracks without traction problems. (I wasn't pulling groomers) so maybe pulling heavy loads there would be a benefit in certain conditions? I have a tucker now with terra tracks,and haven't seen a traction problem,except when on a solid icy hill. In low snow or icy conditions or solid pavement,could only run at about 1 mph,or was banging my head on the roof. With terra track I actually can speed up.