Tire Pressure Monitors
 

I'm intrigued by these to protect against tire damage that's not easily found lke a nail causing a slow leak. $25 seems like a good price but don't these look really big next to that penny? My Porsche dealer gave me a free pair of the silver valve caps with the Porsche crest that I ended up taking off because they look so big.

Hi,

Which ones are you talking about?

Happy Motoring!... Jim'99

1JB, I think you meant to attach a pic, but from your description the monitors in question are integrated with the valve caps?

I have Porsche TPMS and consider it the best option on my car.

You're exactly right about the slow leak scenario as I picked up three such nails over a two month period, which was as annoying as you'd imagine. I would not have known if it wasn't for TPMS, particularly in that I run rubber-band thin 19s on the Carrera S wheel that always look "flat". More valuable still when you consider that our cars don't come with a spare, a consideration that is never far away in my mind and probably the same for other owners.

That's funny sorry. Here's the link. http://www.aviationupgrade.com/

I aaam naught a smaarrt maan.

I check tire pressure every other weekend, but these air alert value caps might help. They look much better than others. I'm very interested, but concerned about size issue too. Anyone has them?

BTW, Thanks for the link

Doesn't say at what pressure they alarm at... I've seen cheaper plastic ones that come in a variety of tire pressure alarmpoints. It would be nice to find a set that have adjustable alarm points.

Hi,

They actually look pretty good, simple, fairly accurate technology. A couple of concerns:

• 1.) The battery is self-contained and not replaceable, so every other year you need to buy a new set.
  
  2.) This device is self-calibrating, but only once. So, you need to make sure that your tires are at the absolutely correct pressure (cold) before installing the cap. If it isn't, you don't get a 2nd chance and so the cap must be replaced.
  
  3.) The Boxster is pretty sensitive to wheel/tire/pressure balance. This device states that it has a 4PSI sensitivity (not the world's best). This 4lbs. could have an effect on the way the car feels and/or drives. It would also be a good idea to have the wheels balanced with this device installed to minimize any risk of annoying vibration.

Happy Motoring!... Jim'99