I got a portable battery-powered Goodyear car tire pump, used to use a bike floor pump for the car tires but it gets tiring for bigger car tires, esp since I help friends keep their car tires inflated. Tonite was inflating tires on a friend's car, the tires were low so it took a fair while even for the battery pump. But still much more convenient than gas stations with balky/dirty air hoses (often requiring money). At 5 kg not good for bike touring; OTOH some bikers report using it at home, goes up to 110 psi supposedly; has a selector dial to automatically shut off at designated pressure.