Saw this - a new tire pressure valve cap gauge. Quite interesting and a new great idea (if the gauge is accurate) but it is rather expensive for valve caps. Times 4 caps - it makes it about $100.00!!!!!!

 

kinda pricey and super akward looking, there's already a product that is a "thershold" guage, i.e. it turns red when the pressure drops below a certain level, that can be had for about $20/set of 4, which makes a bit more sense to me. Looks like they are more marketed towards trucksers than cars (at least I don't roll with 100 psi in my tires. . .)

 

I may be lazy, but not $100 worth! As to those other ones, as they have the valve stop pushed in, they tend to allow air to leak out.

 

Not if you screw them in properly, they seal just fine. I have a set on my truck (that I only drive occasionally) that have held pressure just fine for over a year now, its nice to be able to walk around the car and tell if your tires are all safe.

 

almost looks like those will crack after a few fills...

 

Griots has something that's a bit more practical and better looking...