Semi made me jealous of his wheel covers

[cowmeat]

I was in the turn lane waiting to get on I-4 this morning, and happened to notice this guy's wheel covers. Pretty cool!

Make a 1 mile a gallon improvement in an Insight and you're looking at about a 1.3% increase in mpg. Make it in a semi and it's more like a 16% increase!

[Cd]

Masilla Valley trucking uses a lot of those, as well as side skirts and boat tails.
I really like the look of the moon wheel equipped trucks :

(This fella is missing the back wheels though !)

[OG VX]

^ I've seen those a lot here in NC (the aero tails). I believe a company called "Trailer Tail" was on the last one I saw...

[deejaaa]

i've seen some on the tractors but never the trailer.

[cosmick]

You can get Moon discs if you want the most aero covers for 14"-16" steel wheels, but they kill most of your brake cooling, and brake fade is both scary and dangerous.

[Daox]

Brake fade is scary and dangerous yes. However, I've yet to hear one situation where an ecomodder had a problem with full wheel covers...

Your vented discs will still run air through them as they are a centrifugal fan. They just pull air from behind the wheel. They just don't have the assistance of a spoked wheel which also acts as a centrifugal fan to some extent.

[Vman455]

The only time I've experienced brake fade on a public road was while bedding new pads in my old Ram. 5200 lb truck, and it took nearly 40 "panic" stops in a row from 45+ mph for the brakes to lose it. If you are truly concerned about brake fade from closing off the face of the wheel, I have to wonder what you're using the car for and how you are driving it.

[cosmick]

I had a Camaro, one of nearly 2 dozen I've owned, nearly all of which I've driven, and I was blasting down a favorite canyon early one sunday morning.
It was my first spirited run in this car, but the brakes were good in daily driving.
This one has open-face wheels, and even so, by the bottom of the canyon my brakes were about as good as Fred Flintstone's feet. With the e-brake and manually downshifting ( it was an automatic ) I got stopped safely, before wasting a boring hour watching glowing orange front rotors cool down.
Ever since then, I've been putting together my own big brake kits for far less cost than ordering existing kits.

[Baltothewolf]

A lot of trucks in California rock the side skirts/moon disks/trailer tails. I talked to quite a few truckers over the course of me working in security at a truck gate. The gains are actually quite good from reports. One fellow I remember talking to said at 55mph he gained 3mpg increase, from 9mpg to 12mpg. It may not seem like much, but when you do close to 50k miles a year, the savings are enormous!

[deejaaa]

Originally Posted by Baltothewolf

A lot of trucks in California rock the side skirts/moon disks/trailer tails. I talked to quite a few truckers over the course of me working in security at a truck gate. The gains are actually quite good from reports. One fellow I remember talking to said at 55mph he gained 3mpg increase, from 9mpg to 12mpg. It may not seem like much, but when you do close to 50k miles a year, the savings are enormous!

that is a dramatic increase to me.

Originally Posted by cosmick

.....was blasting down a favorite canyon early one sunday morning.
It was my first spirited run in this car, but the brakes were good in daily driving.
This one has open-face wheels, and even so, by the bottom of the canyon my brakes were about as good as Fred Flintstone's feet........

if that was me, i would have been in EOC mode all the way down.
i don't think i will have any problems when i finally get mine on.