Trailer axle capacity/sizing

[jonny rotten]

Shoreline trailers are no longer in business right? I have a single axle trailer with a 2x3 axle. Trying to figure out weight capacity. A google search shows multiple weight rating for that size axle from 3500 to 5200? How do I find out what it will hold. It's built like a brick shithouse. Also I'm going from a 19 foot to a 21 foot. I can slide the winch forward on the tongue but won't know the tongue weight till after it's on. How do I know if the trailer will even fit the boat correctly EDIT: Going from a 2500# boat to a #3500 1998 210 sundeck. The eye hook on the new boat is 27 in down from the bow. The old boat is 37 in. The new boat from Stern to eye is 2 feet longer. 15 minute ride to the ramp at 40 MPH

 

[Scott Danforth]

5-lug hubs?
6-lug hubs?
8-lug hubs?

 

[cyclops222]

Lots of pictures of the boat, trailer and tow vehicle will be a huge help to guide you. What type of brakes does the trailer have now ? Do you know if they work well ? Picture of the front of the trailer. Make and model of the new 21' boat ? Tire size and weight rating on both tires ? Do you always keep the tires at FULL rated air pressure? Any old age small weather cracks starting on the sides of the tires ? Can you find Load Rating on the tire side wall ?
Sounds like a lot of questions. But we have some great trailer people.
Do you do 65 to 80 mph if conditions & traffic are doing high speeds ?

 

[jonny rotten]

5 lug

 

[Scott Danforth]

5-LUG IS 2500# - 3500# most likely the axles are 3500# axles.

 

[dingbat]

A google search shows multiple weight rating for that size axle from 3500 to 5200? How do I find out what it will hold.

Single axle trailer........#3500 to #5200 involves a tire change.
Existing load rating = tire rating

Going from a 2500# boat to a #3500 1998 210 sundeck.

According to literature the dry weight of your new boat is #3,500.
Add fuel, coolers, toys and misc and your probably closer to #4,000.

 

[Lou C]

The 2x3 axles usually come with #42 spindles. They can be made in 5200, 6000, and 7,000 capacities. Same axle & spindle & same size inner bearing for all 3. What changes is the outer bearing is larger when you go from 5200–>6000
–>7000 and the & hub (drum or disc) is made to take a larger outer bearing. Both the 5200 & 6000 axles use a 6 lug hub but the 7000 goes up to an 8 lug hub.
Learned this when I had a 2x3 6000 lb axle made for my old single axle trailer. Overkill but I like it & it also allows you to use 12” brakes.
Looks like you have a 3500 axle (5 lug hubs).

 

[Lou C]

If you’re going with a 21’ boat I think a 3500 likely will be overloaded. You could buy a 5200 already made (Trailer parts depot sells them) or have one made by a place like Champion Trailers. That’s what the did. Took about a month and they did a great job!

 

[Scott06]

5-lug hubs?
6-lug hubs?
8-lug hubs?

in the pic they are 5 lug

 

[Lou C]

that's why I say it's prob a 3500.

Galvanized Trailer Axles 5200# Plus

Galvanized Trailer Axles 5200# Plus at Trailer Parts Depot

www.trailerpartsdepot.com

this if you need it fast but has to fit the hub width and spring center dimension if a spring axle
If you can wait, Champion Trailers can make it to your specs
they made me a 2x3, 1/4" wall thickness, galvanized, drop axle with the saddle center section for just a bit more than the cheaper ones in that link. Fit perfect.
Here's mine
now I don't worry when I trailer lol. 6000 lbs gives me a big safety margin
next thing is Load Range E tires
currently I have Load Range D on it
not overloaded though....
you can see my old 3500 lb axle on the side of my driveway
Champion made that one too back in 2004
sold it to a guy for $30 less than I paid, in 2004!

 

[Scott Danforth]

5200 and 6000# hubs are 6-bolt

 

[Chris1956]

A trailer for a 3500# boat will need to have a larger capacity, as the trailer itself weighs 600-700#. When I looked at trailers 4 or so years ago, a trailer for a 3500# boat was usually dual axle, with a capacity of about 4400#. You might want to double check the weight capacity of your trailer, as I thought single axle 4400# trailers were rare....

 

[Scott06]

A trailer for a 3500# boat will need to have a larger capacity, as the trailer itself weighs 600-700#. When I looked at trailers 4 or so years ago, a trailer for a 3500# boat was usually dual axle, with a capacity of about 4400#. You might want to double check the weight capacity of your trailer, as I thought single axle 4400# trailers were rare....

Agreed my 3500 listed dry weight boat is on a 5200 lb dual axle aluminum trailer. I would not want to go any smaller.

 

[Silvertip]

Go to the stickies at the top of this page. Bearing sizes can point to weight capacity of an axel. Although the chart covers up to 3500#, the bearing size on your trailer will tell you if the axle is rated 3500 or 5200. Option two is to measure the spindle diameter where the inner and outer bearings ride.