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Old 06-17-2008, 01:36 PM   #1
fishkisser
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Cool Trailer Axle Rating

Hi Guys ... Does anyone know if there is a way to check what your axle on your boat trailer is rated to carry ...
Thanks for your
Barney

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Old 06-17-2008, 01:50 PM   #2
Chrome Bumper
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Default Re: Trailer Axle Rating

Go to the trailer store, find a similar axle and check its rating. They are pretty standard, seems like 5 lug=3500, 6=5200, 8=7000
:

http://www.trailerpart.com/trailerax...FSoZagodll1jVg
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Old 06-17-2008, 01:56 PM   #3
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Default Re: Trailer Axle Rating

The most common are 3500lb tandoms 5 lugs, and 5200 6 lugs. The brake mounts are specfic to the axles rating too I beleive.

What he said.
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Old 06-17-2008, 03:12 PM   #4
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Default Re: Trailer Axle Rating

If the manufacturer applied rating label is missing or illegible, try contacting the trailer manufacturer with the trailer's serial number - some keep amazing records for every trailer.
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Old 06-17-2008, 04:50 PM   #5
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Cool Re: Trailer Axle Rating

The reason I'm asking is I finally weighed my boat today at the scale .
Hooked to the truck the load at the single trailer axle is 3200 lbs .
Its a Carnai Lazer trailer ... close as I can figure its a 1820 with a payload rating of 2900 ...
with ST215 / 75D 14C tires with a rated payload of 3740
Do manufacturers really lowball this stuff in like that , oh yea 5 lugs on the hubs if that counts for anything
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Old 06-17-2008, 07:57 PM   #6
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Default Re: Trailer Axle Rating

Sounds like the axle is 3500#

The biggest killer of tires is heat. Watch the weather, tire inflation, road surface and speed and you will get to your planned destination.

Every thing engineered has a certain facotr of safety built in. Are the springs bottomed out?

Here's a tire that will give 3740# rated capacity.
http://www.tirerack.com/tires/Compar...14&RunFlat=All

Ew, read the reviews on this tire, not good.
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Old 06-17-2008, 08:59 PM   #7
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Default Re: Trailer Axle Rating

Quote:
Originally Posted by fishkisser View Post
Do manufacturers really lowball this stuff in like that.....
A lot of it is hitting a certain price point. Adding a couple grand extra for a trailer that is properly sized can mean you might loose a sale to a competitor. Most folks dont even give the trailer a second thought. Of course you can always rely on that "safety factor". I wonder if the safety factor is the same for an ezloader vs a tricker.......
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Old 06-17-2008, 09:07 PM   #8
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Cool Re: Trailer Axle Rating

Thanks Waterdog now I feel all warm and fuzzy ...
Kinda like dryer lint ...
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Old 07-06-2010, 11:18 PM   #9
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Default Re: Trailer Axle Rating

measure the spindle diameter. the bearings size is all different on the various axle rating... lug count doesnt mean anythinng since you can get 5 lug and 6 lug on 3500, 5000, and 6000 lb axles. 4 and 5 lug on 2000 and 3500 lb... the size difference in rating comesdown to the tube diameter and spindle size... and an 1820 carnai has a 4000 lb axle under it.. fyi...

Last edited by jackr up; 07-06-2010 at 11:22 PM.
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Old 08-07-2010, 07:06 AM   #10
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doh Re: Trailer Axle Rating

Quote:
Originally Posted by jackr up View Post
measure the spindle diameter. the bearings size is all different on the various axle rating... lug count doesnt mean anythinng since you can get 5 lug and 6 lug on 3500, 5000, and 6000 lb axles. 4 and 5 lug on 2000 and 3500 lb... the size difference in rating comesdown to the tube diameter and spindle size... and an 1820 carnai has a 4000 lb axle under it.. fyi...
Sorry jack wrong again ... my trailer has an axle rating of 3750 this information is from .Michelle Dorgan
Carnai Trailers, Inc.
19103 E. Cataldo
Spokane Valley WA 99016
Later ...
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Old 08-14-2010, 10:15 PM   #11
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Default Re: Trailer Axle Rating

Quote:
Originally Posted by fishkisser View Post
Sorry jack wrong again ... my trailer has an axle rating of 3750 this information is from .Michelle Dorgan
Carnai Trailers, Inc.
19103 E. Cataldo
Spokane Valley WA 99016
Later ...
then it got derated by carnai from the spindle rating, since i just yesteday i finished replacing a set of spindles on an 1820 carnai that has been in my shop since i originally made that post... and the spindles were 1750/ 2000 lb units from titan/dexter axle. but since carnai builds their own axle tube assemblies i could understand the derating

the only thing that differes on a 1750 lb spindle(3500lb axle) or a 2000 lb spindle(4000lb axle) is the stub used to attach it to the main axle cross tube. its 1/4-1/2 in longer on the 2000lb spindles, ensuring a larger weld surface area to carry the weight. a 1750 lb spindle on the particular trailer i just repaired was to short, and the 2000lb spindle was a perfect match.


i built a trailer from scratch that is a 6 lug pattern, has a 5000lb rated axle tube, but i only put 1750 lb spindles on it, and a 1.98 " hub size. but i run 235/75st15 rated at 2540 per tire... so if i ever needed to haul a car on my little quad trailer i could... just by swaping to a 5200lb set of spindles and hubs...

Last edited by jackr up; 08-14-2010 at 11:55 PM.
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Old 08-16-2010, 02:38 PM   #12
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doh Re: Trailer Axle Rating

Well Isn't that special ...
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