Something I Hadnt Noticed Before

Topic 25296 | Page 1

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Jeremy's Comment
member avatar

I been noticing that prime trailers look like they have shorter tandem axles it seems there tires are inset a couple inches or so im guessing maybe a fuel mileage thing Any prime people know about this or has anyone else noticed this? And are the trailers as stable with this?

Tandem:

Tandem Axles

A set of axles spaced close together, legally defined as more than 40 and less than 96 inches apart by the USDOT. Drivers tend to refer to the tandem axles on their trailer as just "tandems". You might hear a driver say, "I'm 400 pounds overweight on my tandems", referring to his trailer tandems, not his tractor tandems. Tractor tandems are generally just referred to as "drives" which is short for "drive axles".

Truckin Along With Kearse's Comment
member avatar

Now i have to go look. lol

Our trailers have a safety anti-roll device that tries to stabilize and prevent rolls. It wont completely stop one that is beyond the point of no return however. Not sure if that effects position/size.

We got rid of the duals the first year I was here so not sure if that has something to do with it. Now i am going to be comparing all over the yards lol

Jeremy's Comment
member avatar

Lmao that very well could be maybe the super singles just dont stick out as far but i have seen plenty of super singles out there and never really noticed them to be narrower I dont know why this struck me as different all the sudden but i started comparing yesterday and since there are so many primates out there it didnt take me long to decide this was worth asking

Super Singles:

A single, wide wheel substituted for a tandem (two wheel) assembly. The main benefit of a super single is a reduction in weight and lower rolling resistance which provide better fuel economy. The disadvantage is the lack of tire redundancy (or a 'backup tire' in case of a blowout) from which tandem wheels benefit. A tire blowout is more dangerous with a super single and can not be driven on.

LDRSHIP's Comment
member avatar

Super singles are not as wide as a set of duals. A good couple of inches difference. Look at a tractor with super singles compared to a set of duals. It is noteable how much less they ‘stick out’

Super Singles:

A single, wide wheel substituted for a tandem (two wheel) assembly. The main benefit of a super single is a reduction in weight and lower rolling resistance which provide better fuel economy. The disadvantage is the lack of tire redundancy (or a 'backup tire' in case of a blowout) from which tandem wheels benefit. A tire blowout is more dangerous with a super single and can not be driven on.

Old School's Comment
member avatar

Exactly - it's just the Super Singles that give that appearance.

Super Singles:

A single, wide wheel substituted for a tandem (two wheel) assembly. The main benefit of a super single is a reduction in weight and lower rolling resistance which provide better fuel economy. The disadvantage is the lack of tire redundancy (or a 'backup tire' in case of a blowout) from which tandem wheels benefit. A tire blowout is more dangerous with a super single and can not be driven on.

Jeremy's Comment
member avatar

Ok lol couldnt help but ask i hadnt really noticed before till last couple days thanks guys

Cwc's Comment
member avatar

I have super singles on the tractor and tank. I also have a permit in my books for "short axle lenght" I'm not a Prime driver but... It might make a little sense for someone to view a super single trailer in that way.

Super Singles:

A single, wide wheel substituted for a tandem (two wheel) assembly. The main benefit of a super single is a reduction in weight and lower rolling resistance which provide better fuel economy. The disadvantage is the lack of tire redundancy (or a 'backup tire' in case of a blowout) from which tandem wheels benefit. A tire blowout is more dangerous with a super single and can not be driven on.

Splitter's Comment
member avatar

If you compare mudflaps, the duals have a much wider one than the super singles.

Super Singles:

A single, wide wheel substituted for a tandem (two wheel) assembly. The main benefit of a super single is a reduction in weight and lower rolling resistance which provide better fuel economy. The disadvantage is the lack of tire redundancy (or a 'backup tire' in case of a blowout) from which tandem wheels benefit. A tire blowout is more dangerous with a super single and can not be driven on.

PackRat's Comment
member avatar

If you compare mudflaps, the duals have a much wider one than the super singles.

Not always. I run the same width on my SS as it was when the drives were equipped with the standard dual tires.

Super Singles:

A single, wide wheel substituted for a tandem (two wheel) assembly. The main benefit of a super single is a reduction in weight and lower rolling resistance which provide better fuel economy. The disadvantage is the lack of tire redundancy (or a 'backup tire' in case of a blowout) from which tandem wheels benefit. A tire blowout is more dangerous with a super single and can not be driven on.

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