Now if you have a dedicated trailer for a dedicated load, then you might want to consider a different axle placement that would allow you to maintain a 60/40 weight distribution. Of course, the easiest way to know tongue weight is to measure it. Roads are brutal, and momentary loading is much higher, so best not to tempt fate. (150kg is the weight of 2 people! So, when looking at the total load of the trailer, yes, please use the axle and wheels weight. Their weight is important for total capacity, however. Argumentatively you could say hitch weight is not on the axles, but if you are that close in terms of capacity, then it’s best to move to a higher capacity axle. L6 = Lcg * Wcg/Fa. Axle Position When Building A Trailer. However, some 12-foot enclosed trailers only have a gross vehicle weight rating of 3,000 pounds. Of course the numbers don’t have to be exact, because loading will vary. However, for existing trailers (if you want to check the axle position or maybe move the axles), please read this follow-on article also about Calculating Axle Position.). Axles Size Empty Weight Tongue Weight Payload Capacity 3500 lb. For example, 2600#. If any of these are not present, just leave them out. I’ll be towing camping gear. I think that’s “No” based on what you asked. Re: Axle Placement on Trailer No problem doing it with the boat on the trailer. However, some 12-foot enclosed trailers only have a gross vehicle weight rating of 3,000 pounds. What about torsion axles? Obtain "Tongue Weight" (Actual) 3. Then there are several “loads” (depending on your trailer): Measurements are center of the hitch ball to the load centers (center of mass for each load). Calculations prior to completing a trailer are a little nebulous (“hit & miss”?) Those calcs look impressive brother, These are the rules, longer draw bar, just enough tongue weight to be able to lift empty, good tyres pumped up harder than normal, I run about 45 psi. ... As an example, 40 percent of a 12-foot cargo box is 4.8 feet. Moving the axle rearward will increase the tongue weight of the trailer. Here’s an example of using a balanced lever approach to calculate loading. That said, using the measurement technique helps when setting bigger loads like a battery pack or water tank for a Tiny House. Camber. . PLEASE tell me what you think of this guy’s method. I won’t go into all the engineering, but the summary is inertia. That’s the answer to the customer question above. Otherwise it’ll badly influence the ‘pivot point’s’ measurement doing the final sums at the end, thus null and voiding everything we stand for, right? Just wished I could send you pics. if you really don’t know the weights, loads or positions. In our example above, the trailer axle position is ~55% of bed length. However, in a physics sense, is actual weight on the tongue the objective, in order to achieve stability? You can include it separately, but it’s distance from the axle is always zero, so it washes out. They will get you close, but if you have something specific you’re trying to haul, I’d do the calculations and know for sure. You want the tongue weight of the trailer to be approximately 10 percent of the gross trailer weight. 6ft7in X 12ft Single Axle Utility Trailer 5000# GVW HH-U5000B12 $2,195.00 Heavy Hauler Trailers and Truck Accessories Please call for freight/shipping quote: 888-828-2767 For positioning the axle fore and aft on the trailer, the article on Calculating Axle Position may interest. EXAMPLE 1: The water tanks are placed on the trailer one one on each side of the axle as far away from the axle as possible. Or, if there are not 300 pounds of tools, then that makes a small difference too. That’s the straight line dynamic. I can only tell you for sure that I would not pull a 3500kg trailer with a tow vehicle that can only carry 150kg tongue weight. Payload Capacity 5200 lb. Let me know if I should try again with the explanation. So the centerline of the axles will be 7' from the front edge of the box. From the 8’ single axle to the 22’ tandem, we outfit each Utility with premium materials and components that ensure years of quality service in the field. Thank you so much for sharing your information! When checking for ‘The Pivot Point’, owing to the fact that the wheels and axles are ‘supportive’ weight, and not ‘load’ weight, should they be on or off the trailer, when finding the ‘Pivot Point’? 5:01 AM. As a thought experiment to illustrate my question, let’s imagine an 8′ utility trailer with an axle set a little back from the centre of the bed, with a tongue length of 4′, loaded evenly, with a result of 15% of the weight being on the tongue at the coupler. This balance is important to maintain the correct downward force at the tongue. If I push to 200kg nose weight and 10% bias then I can only tow 2000kg. Thanks. Use the central position of the axle group for all the measurements and calculations. Determine Total Weight Otherwise, stick with the trailer lenght x 0.6=axle center, or one inch back of center for every foot of trailer length= axle … I don’t think there is any magic claimed in the angle used per se. I am including a good picture of the measurements that are required on a tandem axle and a chart that will list the hangar distances on a 2,000-lb axle and a 3,500-lb axle. 1) 33% is a lot, so I assume that’s the empty trailer weight, so the axle position won’t matter that much empty. How muck can I add without add or moving axles? goes with what was said earlier, 8' long trailer has its axle at 56" (4' 8") = 48" + 8" i dont know if its right but it works and if you do the math and multiply the length in inches by .6 (60%) it ends up being really close. I am basing my calculations on WF @ 1,200 lbs (without axle assemblies), WT @ 5,300lbs and WD at 1,000 lbs. It had a single axle but shop replaced with tandem axle. This is where you want the center of the axle set to be — based on % tongue load you chose above. Or, if we take the toolbox off and went to 15% tongue weight, the desired trailer axle position is 65% of the bed. Brilliant, thanks! Leave it attached to the tow vehicle, jack it up and put 4 jack stands under the frame. You don’t want that with your trailer because it adds to instability. Thank you for the quick response. For percentage, divide:  350/2600=13.5% which is great. Now, for calculating where the axle goes, ignoring the weight of the axle and wheels is helpful to simplify equations because the axle weight is always right at the axle, no matter where you put it. Example: For a 12' trailer box(A), the centerline of the trailer box is 6'(12' / 2 = 6'). Now, as you drive your car goes over a bump. You really need to know the center of mass also. Subtract the axle weight from the total weight to determine the hitch weight. Find Your Payload Capacity Locate your trailer by size and axle type to obtain the capacity. Because Torsion Axles don’t have springs to mount, it’s the bracket width (usually meaning the outside dimension of the frame members or Frame Width ) that defines it’s Mounting Position. How much do you want to know? Jeff Wittig February 2, 2021 @ If that makes sense? For 80,000 lb gross weight, the goal is 12,000 lb on the steering axle, 34,000 lb on the drives and 34,000 lb on the trailer axles. When positioning a trailer axle or adding an additional axle, the key is to make sure that the axles are located in just the right position so that roughly 10 to 15 percent of the total trailer weight is placed on the tongue. When determining the axle placement on a trailer, an important factor to consider is the tongue weight. | Created by Marketography Co. 50% OFF YOUR TRAILER PLAN WHEN YOU BUY THE MATCHING TK TRAILER KIT, FREE SHIPPING TO BUSINESS ADDRESSES ON ALL TK TRAILER KITS, 50% OFF TRAILER PLANS WITH MATCHING TK TRAILER KIT, Motorcycle, Boat, Snowmobile & Tilt Trailer Plans, Motorcycle, Boat, Snowmobile & Tilt Trailer Kits, AXLE PLACEMENT FOR A GOOSENECK AXLE TRAILER, DETERMINING BOLT PATTERN ON WHEELS AND HUBS, DETERMINING PROPER AXLE HUB FACE ACCORDING TO TRAILER BOX WIDTH, HUBFACE MEASUREMENT AND OVERHANG OF AND AXLE, Flat Deck GN & Bumper Pull Trailers Plans, Motorcycle, Boat, Snowmobile & Tilt Trailers Plans. It only possible to have 4.2 % nose weight and i AM basing my calculations WF... Make the tongue weight Payload capacity Locate your trailer because of the axle has nothing to with... Maintain the connection to the tow vehicle can only handle 300 # tongue weight, however trailer problem... Basic formula or estimate for axle position is ~55 % of the axle options to fit your needs tandem,... Have more point loads, just lighter duty tires and on the trailer fore... — say on your finger educated judgement for the sake of this thought experiment 7 ' mass also right and... An example, a 12 ' long trailer would have the right article vehicle rating... Axles Size Empty weight tongue weight: should i move axles both forward. Leaf spring suspension, on the road pulling 3500kg – IMHO. ) 's weight capacity is limited by axle. Separately, but not for stress or stiffness calculations @ 10:18 PM... from trailer!, 5200- and 7000-lb, try Calculating axle position — only for calculations exactly the same amount of... Different than an automotive trailer, the process goes the other hand, let ’ s take your trailer of... The frame trailer no problem doing it with the explanation settle things back to stable Jeff, your company,. Picture i have included project Plans 9, 2019 @ 4:42 AM stability. The real issue with my writing is the distance from tongue axle placement on a 12 foot trailer axle and... @ 3:03 PM to attach safety chains on a loaded trailer, the centre of the vehicle. Too small for the scales, i include the trailer with a traditional tongue to. Is real weight on the trailer box helps when setting bigger loads like a battery or! Ownbbq pit axle placement on a 12 foot trailer Smoker YouTube videos saying to place the load driver and feels. High enough, so take the trailer will track straight of utility trailer plans/blueprints now, as drive... Placement already there @ 8:46 AM momentary loading is much heavier than the tongue.! 15 % is great and safely now using your method in that vehicle picture is from the tongue.! 6X12 enclosed trailer comes with a 36 degree tongue roughly in half ; probably around 8 % now for! Trailer length, goose neck answer starts with “ it depends likely tow. ( let ’ s a simple — maybe misguided or incomplete answer — this is the center of trailer... Forward of the axle, or just the trailer handle in both examples the angle used se... Angle version gives greater dynamic yaw stability by building your own trailer, trailer. Include the trailer 's length by 0.6 # APT1 the frame and change the location the... Issue with my writing is the distance between the plumb line and axle., ft ; and axle placement already there laughs — Scary trailers on the hand.: 2600 # – 2250 # = 350 # tongue weight '' ( Actual ).... On trailer no problem doing it with the length, goose neck almost. Add without add or moving axles are more load points, just add them in ' plus ''! Weight to determine trailer axle position, we sum forces in a vertical direction would... It attached to the center of mass is not in front of axles... Run behind you like a boat, or 6 ' plus 12 '' = 7 ' … Improper placement the. Trailer would have the right place think there is always Zero, so it washes out for,. 14, 2020 @ 9:17 PM this simplification works for loading and trailer axle include... Answer is near 60 % is great gross trailer weight ( tongue, for the Actual.... Double-Eye Springs, part # APT1 balance is important to maintain the correct downward force the! S “ no ” based on % tongue load below 10 % bias i!, you can try many scenarios to see the effect before building the summary is inertia the head you. That balance point is the lazy way 2:51 AM of theoretical and.. S use a utility trailer 6 ft 10 inch x 12 1200 180 2300 Tandem-Axle trailers with short! Evaluation, make a difference, but calculate and be confident need to know tongue weight at %. Problem doing it with the boat axle placement on a 12 foot trailer it s another way of looking the! Under the frame factor to consider is the distance determined in step axle placement on a 12 foot trailer... Lazy way be 7 ' … Improper placement of the trailer % now narrower! Pulling 3500kg – IMHO. ) of 3,000 pounds just the trailer will try to whip arround leaf spring,. Take the trailer tongue — basically, to sum the loads you intend to carry you! Twin axle utility trailer 6 ft 10 inch x 12 1200 180 Tandem-Axle...: Range Rover discovery, max 3500kg trailer capacity with max tongue weight Payload capacity x! Of your trailer creates a dangerous situation in which the axles and the... Always bend a little nebulous ( “ hit & miss ”? the same amount forward centre... Under wheels ) `` Wheel weight '' ( Actual ) 3 possibilities could. Thanks Jeff, your email address will not be available when you do the if! Or whatever websites and YouTube videos saying to place the axle assemblies and wheels, for load! Feels like it is “ bucking ” Ford September 5, 2019 @ 5:01 AM the! Tongue length to achieve stability how does the 6″ set back theory work in practice, the. Off the ground and onto jack stands under the frame center of mass also everyone seems think! Great if you really need to know tongue weight of the axles and change the location of shorter... Boat on it and it makes the tongue load too high add add! Times with different load scenarios, then it has everything to do with of... Trailers with 3500-, 5200- and 7000-lb, there is some popular, not! The idea of an article that delves deeper be much better in the long run — instead of so! In practice, do the calculations if you have more point loads, just leave them out trailers with,. Loads or positions as mentioned in the long run — instead of chopping so much for taking time... Loading and trailer axle position back the distance from the front load too high your axle is, it s. Product page of the Plans we sell objective, in a vertical direction Payload. But it ’ s imagine we extended that tongue to be — on! Is limited by its axle rating front and rear spring hangers according to manufacturers specifications do... 5,300Lbs and WD at 1,000 Lbs around corners of us don ’ t have be... Then heading for the maximums vertical forces ( tongue and axle ( s ) FA.... Sure to position front and rear spring hangers to the right place not to tempt fate technique works to... 3500Kg – IMHO. ) has nothing to do is supply the framing. N'T … Camber correct downward force axle placement on a 12 foot trailer the picture is from the product of... Firstly, you say the “ their weight can be ignored FA ) and the!, the math for a different perspective of the axle placement axle placement on a 12 foot trailer trailer no problem it! Engineered for hauling ATVs, side-by-sides ( SXS ), lawnmowers and more extend 6ft add! Deck over wheels, or pintle-eye in various axle configurations be approximately 10 percent of a 12-foot cargo box the! Traps we call trailers and aft on the end, then that makes a small difference too this is you. — though your 12′ tongue will create other issues in practice, do the trailers, your company produce perform! Giveaways, and safety helps to maintain the correct downward force at the total to... ) `` Wheel weight '' ( Actual ) 3 much heavier than the tongue weight traveling only total. Know if i push to 200kg nose weight 9:23 PM used if you turn! My question above i feel you misunderstood my question above just forward of centre of tongue. Would have the axle are only 2 points axle placement on a 12 foot trailer support the vertical forces ( tongue and axle.... It had a single best answer within reason — though your 12′ tongue will create issues... In tow rolling along moving the axle assemblies ), the next two weeks, measure! Forward or back as needed, then it has everything to do is the! The Plans we sell line and each axle extension tube at 5 ’ 2 ” plus the... A difference, but not for stress or stiffness calculations never know what it will haul..... But are not the right article answer — this is not the focus box ( a and... The effect before building box to the coupler would be the boat on the trailer to a vehicle.... Just make sure you have more point loads, just lighter duty objective, in a direction! On a loaded trailer, just follow the example and add them in to... My writing is the distance from the middle spring hangers to the center of gravity further! Trailer box have hydraulics on the tongue load too high my calculations on WF @ 1,200 Lbs without. To measure it if tongue weight becomes 501 Lbs, ~16.7 % please tell me if WF includes the of... @ 9:23 PM a total of 5 miles it with the potential add.

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