dimensions of 10 L and 20 L
I have talked to several people in the past about this subject. A 'better safer route' for roof mounted scepters would be the smaller 10L scepter runts, carried upright they are just under 14" tall compared to a 20L @ 20" tall
a flat lying scepter is 7" and people do carry them lying flat but I would not, far to risky dangerous and expensive if a cap loosened cracked or had a gasket failure. Water cans fine but diesel or gas NO WAY I would as the bumpy offroads anything can happen!!