You can use metric measurements or imperial, as the calculations are the same. If you’re not, then please read this first, then come back here. The calculator assumes you are familiar with terms like GVM, GCM and TBM. NEW as of 24/10 – check front and rear axle weights, a common limit to run uo against!.Understand your trailer weights and get basic trailer weight advice.See how close you are to limits such as GVM, max tow, payload and GCM.Work out how much payload you have left once your trailer is attached.See the heaviest trailer or caravan your car or 4×4 can tow.Work out if your car can tow a given trailer or caravan.Just enter a few measurements below and you can: Moving the product forward or backward will distribute weight differently.Ĭhanging the kingpin setting and/or moving the trailer axle group forward or backward.Īxle spacing within an axle group has a lot to do with what is allowed by states, so check with the states directly.Got a trailer or caravan? Want to know if your weights are within limits? This tool is what you need! Not to over simplify this process, but typically an item can be adjusted in the case above you might move the product toward the back of the flatbed so the weight is evenly distributed on both the drive and trailer tandem axles. For example you might have 80,000 lbs total on your trailer like the image below, but you are over the legal limit on the drive tandem. However, it’s very difficult to get a trailer loaded so your axle weights would equal 80,000 lbs without going over on a set of axles. If you add all those weights up you get 80,000 lbs. So the image below shows a typical flatbed setup with max legal weight limits listed. States also have as mentioned axle weight limits. The max gross weight of a shipment with a tractor trailer combination is 80,000 lbs. – This is the max weight allowed on any axle configuration with a permit. – The max weight allowed on any axle configuration without requiring a permit. So review our Permits and Escorts Page for a list of axle weight limits by state. – Four axles arranged together and found on trailers.Īs mentioned, states range when it comes to axle limits. – Three axles arranged together and are found on drives, trailers, or both. Generally you have a drive tandem and a trailer tandem. – This is the most common tractor trailer axle configuration setup. – A single axle is generally seen in a smaller tractor trailer setup or on a spread axle trailer or as a booster. – The first axle and in fact steers the tractor. So lets break it down: Axle Configurations Secondly, states vary about what the rules are for these different axle configurations. The first thing to point out is there are several different types of axle configurations. Knowing the tractor trailer axle weights is vital to ensure a shipment is hauled legally. Understanding axle weights is extremely important in the heavy haul industry.
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