my front tires on my X-One have problems staying inflated....and it gets really annoying, perhaps the 12psi that i put in them isn't enough. two questions, does anyone else have issues with the front tires staying inflated and if so what do you do to keep them from going flat? POLL.......do you prefer the no flat caster tire(solid) over the inflatable tire? (BTW i have Flex Forks installed) Thanks!!!