Does Trailer Axle Need to be Moved Forward?

Question

Question:

I used a caravan chassis to make a trailer I cut out 1.5m from rear the total length of trailer from the tow hitch to the rear end is 4.6 m now the front of trailer is very heavy to lift up do I need to move my axle forward as per 60/40 ratio and if I do move it do I measure from tow hitch which is 1 meter or from the trailer box which is 3.6m

asked by: Ricky

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Expert Reply:

The correct axle position should be determined by the formula I have added for you. The 60/40 ratio you mentioned is normally just a starting point and you would want to use the formula to figure out the optimal place for your axle. As for measurement, when using this formula you will want to measure from the end of your trailer tongue.

expert reply by: Kyle S

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Answer 1

The Timbren Axle-Less Trailer Suspension System - Straight Spindle Only - 3,500 lbs #ASR3500S05 has a deflection of 1-3/4 inches. I've attached a photo to assist. We recommend 4 inches above the tire in most cases for fender mounting to…

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Answer 2

For a single axle trailer, you want the shackle strap to be able to move so that you have the spring deflection needed for your suspension. Angled like the photo or even almost vertical is fine you just don't want the shackle strap to bind…

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Answer 3

Usually it's best to go with the leaf spring capacity that matches the axle capacity but if you are sure you'll be a lot under that I would shoot for a little over what it will weigh at max. So if you're going to be at 3,000…

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Answer 4

When you replace leaf springs on a trailer you want to match the capacity as well as the length. Since your 2021 Wolfpack 365PACK16 has 7k axles you want 7k leaf springs (3,500 lbs per spring). You can also use your spring eye to spring eye…

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Answer 5

The 60/40 axle placement formula is a great starting point and does take into account the tongue of the trailer from where the trailer sits on the hitch ball. Please keep in mind that this is a very basic formula or estimate for axle placement. For…

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Answer 6

Leaf springs stretch with use and age and to make sure you match their length, as well as their capacity, you will want to pull one out of the trailer's suspension so you can measure its eye-to-eye length. A well-used spring can stretch as…

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Answer 7

Generally speaking, on a single axle trailer you will want the leaf spring hangers to be spaced apart 1/2" less than the eye to eye measurement of your leaf spring. Therefore, you will want to place the hanger 25-1/2" apart on…

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Answer 8

The Single-Axle Trailer Hanger Kit for Double-Eye Springs part #APS4 uses 3/16" thick hangers.

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Answer 9

It would be the best to replace all of the springs at the same time with the same size and capacity like you are thinking about doing. In the 25-1/4 inch size the part #e57SR would work great.

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Answer 10

You can replace your current springs with higher capacity springs, like #e57SR which are rated for 4,000 pound axles (2,000 pounds per spring), but it isn't going to increase the weight capacity of your trailer. You'll still be…

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Answer 11

Good question, and what happens is that leaf springs elongate over time, and since you mentioned you got measurements of 25-1/2 inches from center eye to center eye and 26 inches under partial load, the best option for leaf springs really is the…

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Answer 12

I'd recommend the 3-Leaf Double-Eye Spring for 4,000-lb Trailer Axles part #e57SR which measure 25-1/4" long and have a bit more capacity than your standard 3,500 lb spring so they won't wear out as fast. This means you must…

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Does Trailer Axle Need to be Moved Forward?

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