How to Determine if 26" Leaf Springs Will Work

Question

Question:

Looking for replacement leaf springs for my boat trailer, currently has 1/3/4 axel, 4 leaf spring , measurements for leaf springs are 28” from middle of bolt to middle of bolt, but it is loaded - will 26” work ? I can send a picture.

asked by: Michael S

0

Expert Reply:

Hi Michael,

It's going to be impossible for me to tell you if the 26" long 4-Leaf Double-Eye Spring for 2,000-lb Trailer Axles # e77SR will work because you can't measure with a loaded trailer. To determine the right leaf springs there's really no choice but to measure them with an unloaded trailer because having weight on them will cause them to flex an untold amount.

I'll go ahead and link our options for replacement springs for you to come back to when you get a chance to measure the springs when the trailer is not loaded.

expert reply by: Kyle S

0

Jameson C.

1/27/2026

Hey Michael, were you able to remeasure your boat trailer’s leaf springs once it was unloaded? Knowing what you found could really help others trying to match the right spring length for their trailers.

Answer 1

For your 1965 Ford F100, the rear air suspension you want is the Firestone Ride-Rite Air Helper Springs - Double Convoluted - Rear Axle #F2071. This is a confirmed fit. You may also be interested in a compressor like #AL25804 to adjust the pressure…

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Answer 2

The Timbren Trailer Suspension Enhancement System Light-Duty Trailers 1,000 lbs #TTRA1702 will be a great help in reducing body roll and helping dampen the bounce. Based on your measurements this will immediately take on load and stabilizing while…

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Answer 3

The Timbren Trailer Suspension Enhancement System #TTRA1702 is 2-3/4" tall with no load on the spring. This particular system is designed to mount to the frame with the included bracket(see image) and when the suspension compresses the axle will…

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Answer 4

Thanks for your question, John! Wish I had an easy and quick answer for you but I'll need a bit more information to get you the right spring. I searched your trailer and there isn't any information out there IDing the length and capacity of…

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Answer 5

Usually when a trailer is bouncing around a lot behind tow vehicle, it starts with an improperly loaded trailer that has too much tongue weight and weight that is not properly distributed. Typically a trailer should have 10-15% of the total weight on…

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Answer 6

We have confirmed with SumoSprings that the #TSS-107-40 can be cut down to shorten them, but the brackets will fit a U-Bolt plate that is at least 3-7/8" wide. This will typically be larger than what is used on an axle that is less than 3,000…

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Answer 7

Hi Jeremy; can you send me a picture of your axle tag? Assuming the axle manufacturer is still around that is the easiest way to identify a replacement. If it is missing or worn, you will need to measure. I'm going to need to know the capacity,…

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Answer 8

It sounds like you installed leaf springs that weren't the correct length for your setup. Looking at your equalizer it looks like your springs are too long. The simplest solution would be to have your front and rear suspension hangers removed and…

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Answer 9

There should be enough free play in the shackles to allow them to move. There is no specific torque rating for shackle bolts. The first thing you should make sure of is that the bolts you use are long enough so that when installed you will have at…

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Answer 10

Hello Robert from Norway, and greetings from Wentzville Missouri USA! The 2 bolts for the leaf spring should be tightened but there is no specific torque setting. You don't want them too tight because this could cause the suspension to bind. The…

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Answer 11

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 12

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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How to Determine if 26" Leaf Springs Will Work

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