• ELI5: Why do dump trucks have an extra pair of wheels under ... - Reddit

  Jun 4, 2014 — They're called drop axles. They're lowered when the truck (often a dump truck) is carrying a heavy load, to help distri...

  Reddit ·

  r/explainlikeimfive

  

• Why do really big trucks sometimes have wheels that don't even touch ...

  Aug 8, 2021 — I'm assuming you're talking about tag axles. When the truck is fully loaded, the axles are set down to help spread the ...

  Quora ·

  Keep On Trucking

• Why Some Truck Tires Float Above The Ground - YouTube

  Jan 31, 2024 — they provide additional support when the truck is hauling heavy loads. ... around for starters they're there for bette...

  YouTube ·

  Tech Time

  

• Why do CONCRETE TRUCKS have EXTRA wheels? ‍♂️ - YouTube

  Jan 20, 2024 — this not only enhances the truck's stability. but also plays a vital role in extending the lifespan of the tires. the ...

  YouTube ·

  Mr. Concrete

  

• What is the deal/function of all those extra wheels on garbage trucks ...

  Jun 1, 2018 — In most cases they are used to cover extra load weight. They are suspended till needed then lowered to highway level to...

  Quora

• Why do big trucks have one or two pairs of wheels that they don’t use?

  Dec 28, 2018 — They're called a "tag axle" if it's just wheels, "drop axle" or "lift axle" if it has power or steering. They're mount...

  Reddit

  

• Why Do Some Truck Tires Don't Touch The Ground?

  Dec 2, 2023 — well actually there are multiple reasons for it but let's start with Better grip and traction lift axles can be lowered...

  YouTube ·

  Truck Tropia

  

• What are the extra tires on a dump truck for? The ones that don't sit ...

  Jun 25, 2019 — You might want to keep a closer eye on these trucks. The 'extra' set of wheels are lowered to the ground when the truc...

  Quora

• Why Do Concrete Mixer Trucks Have Extra Wheels on Top? - YouTube

  Apr 29, 2025 — those extra wheels are officially known as tag axles or lift axles they're designed to be raised or lowered depending ...

  YouTube ·

  Mr. Concrete

  

• What are those third (3rd) set of raised wheels and axle on a dump truck ...

  Oct 6, 2018 — The extra wheels (sometimes also known as a tag axle among other terms) do indeed help distribute the weight of the tru...

  Quora

• WHY DO THESE TRUCKS HAVE SO MANY WHEELS? ▶ SPECIAL ...

  Aug 25, 2023 — this is why the company equips its trucks with additional axles which are retractable. as their use is focused on spec...

  YouTube ·

  Gear Tech HD

  

• Tri-Axle Trucks: Safety and Compliance Considerations - Lytx

  The additional axle provides extra support and weight-bearing capacity, allowing the truck to carry heavier loads than a standard ...

  Lytx

  

• Invest in Tri-Axle Dump Trucks: Dos and Don'ts

  Oct 23, 2017 — So if you're looking to invest in dump trucks what are the best options? While there are pros and cons to every dumper...

  Coopersburg & Liberty Kenworth

  

• The Indispensable Role of Dump Trucks in the Ready Mix Concrete Business

  Oct 17, 2023 — These regulations are put in place to protect roads and bridges from unnecessary stress and damage. Overloaded dump tr...

  Central Carolina Scale