Originally Posted by kellymac530
Are you saying that in the OP original question that a 19" tire is "better" in sand?
what i said was the 21 works better because of the smaller cross section width, and not the relatively small difference in inflated diameter compared to the 19.
woody pointed out that he can build a 21 lighter than a 19, saving unsprung weight and allowing the suspension to work better, also a factor.
i average over 3000 miles/year on gravel and recommended the 19 for a combination of road surfaces, it's what i run. it hasn't been mentioned, but a 19" tire inflated to rated pressure is a wheel saver on rough roads.