A concrete question, whats the tag axle called on a mixer truck?

Nope, just a tag axle. for weight distribution.

 

I've heard them called "boosters". Also "tags".

 

It's just a tag axle. You are generally looking at the west coast mixers set up like that. Here in Arkansas our Mixers have a tag just forward of the drive tandems. Flip the air and down they go. Always pick em up when turning or on the job. It helps a little bit.

Slang is used a little bit. If you heard get under the boot, that means back your mixer up the plant concrete output shaft boot a rubber device that will go into your rear loading chute into the drum.

 

I’ve heard then called bridge axles. I guess because they extend your bridge.

 

I've heard swing arm and stinger.

Around here they only get used if there's that much weight. Beyond the standard drops. A lot of times they won't be down.

 

I wish they would enforce them a little better around our area, not for weight but just general "how big of a piece of #### are you driving today."

 

Pusher axle is in front of the drives, tag axle is behind. Some people call them drop axles, others call them lift axles. Whatever.

 

Sometimes they are called Loadmaster axles.