Tire Pressures

I Initially thought these were going to be fitted 'just because I could', but actually they might turn out to be very useful.

First you replace the dust caps on the wheels with these:

Then plug this into the power socket

And there you have a reading of the tyre pressures (and the tyre temperatures if you press the button on the side to switch displays).

 
Interestingly I had checked the pressures 2 days ago and they were all reading 20 psi on my normal gauge which is just a bit above the recommended pressure.  As you can see, this system thinks they are 16 psi on the left and 15 psi on the right.   So tomorrow I will to blow them up a bit until I get 18 psi all round and see if it makes a difference on my trip to the Great British Sportscars Open Day (free coffee and cake ).