Originally Posted by dagcodad
I purchased the Crossfire system. Has one valve for filling both tires, tire pressure equalizes. One hub-mounted sensor that warns if tires are over or under inflated. $56 per side, expensive but worth it to me.
As a tire engineer I do not understand the value of Crossfire. It is easy to set a pair of tires to same pressure +/- 1 psi.
Crossfire does not warn you when one tire starts to leak. What it does is lower the pressure in the good tire while the leaker continues to leak. Yes the cross fire is suppose to stop the air transfer after a while but it does nothing to actively warn the driver that one tire is leaking and the "good" tire is being overloaded.
You can end up driving on one flat tire and its mate being 100% overloaded, so now you have two scrap tires and still are bopping down the highway blissfully unaware of what is happening 30' to your rear.
A good TPM system will warn you of a tire leak in a dual. It will also warn you of a leak on a front tire which can be much more serious. Crossfire does nothing for your front tires.
An investment of about $300 - $400 for 6 tire monitoring can pay for itself with a single activation and warning. I don't even have to get out in the rain to look at some indicator before starting my travel day. My TPMS can be set to give me current pressure in the AM while I sip my coffee when still in my PJs.