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The green ones.

I have a set made from yellow dice on my Blazer 4WD. I get an astounding 15mpg. I think the yellow ones are better than the red or blue ones.

I'm surprised no one has mentioned the ones Miraphone makes. But I like the Alexander ones better.................

The valve cap is irrelevant. But you should definitely fill your tires with nitrogen instead of plain old air.

Fill the tire with concrete, then you can omit the valve and its cap all together.

None. The trunk of my convertible is too small to carry my tuba.

Mark wrote:The valve cap is irrelevant. But you should definitely fill your tires with nitrogen instead of plain old air.

True, and that's how you get the green valve caps! I've had nitrogen in my tires for the past four years, and there's no 'Tire Pressure Warning Light' triggered when cold weather arrives. They just keep on rolling.

You aren't running tweels?!?

It's the latest tweak!

https://www.michelintweel.com/

If you use Presta valves and caps instead of Schrader you will go much faster and double the gas mileage because the aerodynamic profile is far superior.

I


The difference is like night and day.

Hup