Bicycles and tires that change when the weather changes?

Yep....condensed mass. The same thing is going on with your car tires and any other inflatable thing. This is why you should check the pressure frequently. (less important on the bike except for flats, but really important on your car!)

If you've ever heard that you're supposed to check your car tires before you've driven on them, this is why. When the air in them heats up from friction on the road, the pressure increases from 4-8 psi usually. Bike tires do the same, but it's so minimal that it doesn't really matter....you just want to be sure to have them fully inflated before you ride.

All let you all in on a secret u can put nitrogen in your bike tiers its available for a flat lifetime fee at any Honda dealer the benefits are it hardly changes until the air Temp gos below -50 deg the drawl back is that You have to go to the Honda dealer that is nearest i have one four blocks away no bigy i payed a one time fee of 60 bucks for my car tiers and they let me fill my bike for free they never loos presure from low temps or high ones ithere

That would be any tire in the cold. Cars, bikes you name it. Air gets colder and condenses when under pressure. That is why many car tire stores put Nitrogen in tires as it is less affected by temperature changes. I have never heard of putting Nitrogen in bike tires though.

The air gets denser when it's cold so the pressure in the tires drops.