bull$hit. Possibly some value in a stock car running 200 MPH around a hot track, but totally unnecessary in a normal road machine. (But let's not hijak this thread to beat the dead horse about nitrogen in the tires.)

Like others have said - just check the pressure BEFORE a long ride. That is the cold pressure. After riding a while, the tires heat up and pressure rises. As long as the pressure is near specs before the ride, you should be fine.

 

It's not nonsense. Nitrogen in tires at a 95% purity rate has less fluctuations in pressure due to temperature changes, and it also has better retention properties meaning you won't lose pressure over time. If you think otherwise, you need to inform Consumer Reports and the NHTSA because they both say that it's a fact. Consumer reports did a test from Sept 2006 till Sept 2007 that proved it. The NHTSA also says that nitrogen filled tires age less than air filled tires. What supports your "nonsense" assessment?

 

If you air up your tires in the garage early in the morning when its 75 degrees to 40 psi and let it set in the garage until the afternoon when it's 105 degrees in your garage, the pressure would increase to 42 psi.

 

I always go to my local dealer and let them fill my tires with genuine HD air. It's the best you can get.

 

I use a nitrogen mix in all my tires. 78% nitrogen.

 

I always start out a new tire with a special blend of 79% Nitrogen, about 20% O2, and just under 1% other gases. This start out mix permits more 02 to leak out preferentially as compared to the Nitrogen, by virtue of the smaller molecular radius of the Oxygen gas. Over time, this mixed gas tire inflation strategy produces a gradual increased concentration of in-tire Nitrogen gas as the Oxygen levels drop off.