SumoSprings Kit Recommendation for a Single Axle Boat Trailer and a 1,500 lb Boat

Question

Question:

Hello, Im looking for Sumo springs for a single-axle boat trailer. The trailer itself weighs 1,000 pounds, and the boat and motor combined weigh 1,500 pounds. The 1 3/4 leaf springs are under the 2 square axle. There is 5 3/4 of space between the leaf spring and the frame. Do you have a solution? Thanks

asked by: Carlos

0

Expert Reply:

Hey Carlos, thanks for reaching out!

Sounds like you're needing the SumoSprings Trailer Helper Springs w/ Line Relocation Bracket # TSS-106-40.

It might seem like the specs you referenced don't quite match up, but you only told me the weight of the trailer and the boat - I'm sure the axle is rated for a little more than that. And the spacing you have, I'm guessing was taken while the boat was loaded whereas the spacing SumoSprings talks about is with the trailer unloaded. So, you're actually good on both ends!

Was there anything you're needing to upgrade/replace while you're at it?

expert reply by: Jon G

0

Carlos

7/12/2025

Hello Jon, Unfortunately, the bracket did not fit my boat trailer. The bracket sits on the leaf spring just like it should, but the long side mount U-bolt hits the leaf spring U-bolts as if the long Sumo U-bolts are not wide enough, and the square axle blocks the bracket mount holes anyway. The frame is 2" wide, so if there is a spring that I can mount to the top and the spring points downward, that should work.

Jon G.

7/21/2025

@Carlos Sorry for the delayed response on this - I was out of town. Would you be able to send me some photos directly to [email protected]? If this isn't working I'd be happy to send in a note to our customer service team to look into a return for you.

Answer 1

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…

view full answer...

Answer 2

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.

view full answer...

Answer 3

Hi Paul, you’re definitely on the right track here, and I can help you narrow this down with confidence. With your tandem 3,500 lb Dexter axles and 33 inch spacing, both the Dexter EZ Flex part #K71-652-00 and the Lippert Road Armor part #LC53CK are…

view full answer...

Answer 4

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

view full answer...

Answer 5

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

Answer 6

Hey Bryan, that's a good question. The pricing can definitely be misleading, but I wouldn't use it to judge the quality of the tire. A lot of that comes down to promotions, inventory, and whether you're looking at a tire by itself or…

view full answer...

Answer 7

You can use leaf springs that are rated higher than the axle without any issues as long as they measure the correct measurement for your trailer. For example the 6-leaf double eye spring for 7,000 lb axles part #e64SR measures 24-7/8" eye to…

view full answer...

Answer 8

Hey Doug! The Firestone Ride-Rite Air Helper Springs #F35FV are the right kit for your 2026 Ford F-350 FX4 dually. However, you will need to measure to be sure it fits. The distance from the top of your rear axle to the top of the jounce bump stop…

view full answer...

Answer 9

Since the pin weight of your camper is 2.1k, I recommend going with the LoadLifter 5000 opposed to the 7500. While technically there is not reason you couldn't use the 7500 kit, it really is not necessary for a camper like yours. Generally the…

view full answer...

Answer 10

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

view full answer...

Answer 11

The 5.30-12 tires, being wider, are going to make more contact with the road. This means that the noise, and heat build up will be higher than a 4.80-12 tire but the rolling resistance will actually be less because the tire is larger diameter. The…

view full answer...

Answer 12

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

view full answer...

SumoSprings Kit Recommendation for a Single Axle Boat Trailer and a 1,500 lb Boat

Product Page this Question was Asked From

Featured Help Information

Instructions

Continue Researching