What Spring Bars Should I Use on my Blue Ox SwayPro WD System for a 3,500 lb Dry Weight Trailer

Question

Question:

I have the blue ox sway pro I believe thats what its called.. Im pulling a 20foot camper that weights 3500 dry. What size bars should I be using? The ones that came with it when attached are about an inch from the road and rub the road on every bump. The have the single dot on them.

asked by: Greg D

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Expert Reply:

When you are looking at a Weight Distribution System, you are going to want to base the weight rating off of the Tongue Weight (TW) of your loaded and ready-to-go trailer, plus any cargo that will be behind the rear axle of your tow vehicle. Since the ideal TW of a trailer is 10-15 percent of the Gross Trailer Weight, the Blue Ox Spring Bars that are rated for 350-550 lbs # BXW4005 will work well if your TW plus any cargo behind the rear axle of your tow vehicle does not exceed 550 lbs.

For your application, since the dry weight of your trailer is already at 3,500 lbs, I recommend using the Blue Ox Spring Bars that are rated for 750 lbs # BXW4006. These bars have a range of 550-750 lbs which should be in the range of your trailer's loaded and ready-to-go TW plus the weight of your cargo behind your tow vehicle's rear axle.

It is always wise to prepare your trailer and tow vehicle as if you were getting ready to leave on a trip and then figure out these weights so that you can pick the appropriate spring bars for your setup.

I have attached links to some demonstration videos and a few helpful articles for you to review as well.

expert reply by: Jon G

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Answer 1

Thanks for the pictures! The 550 lbs spring bars you are using are too small and is causing the sagging in your Silverado's rear end. I looked online your 2022 Winnebago Micro Minnie Travel Trailer has a 6,000 lbs total weight capacity. Tongue…

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Answer 2

Based on the information you sent, you are landing at the top capacity of one set of replacement spring bars, Item #BXW4006, and the lowest capacity of another set of replacement spring bars, Item #BXW4007. With your guess of 730-lbs to 800-lbs…

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Answer 3

Springs bars from Blue Ox that have two dots (sometimes called dimples or notches) are rated for up to 750 lbs of tongue weight. What you have are the Spring Bars for Blue Ox SwayPro Weight Distribution System #BXW4006.

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Answer 4

Using spring bars that are overrated for the total tongue weight of your trailer can cause a pretty rough ride but other wise would not actually harm anything. If you notice the rough ride then replacing your spring bars with one that are rated for…

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Answer 5

Using a Weight Distribution (WD) system that is rated too high or too low is never a good thing. Too high and your ride will be very stiff but too low and you won't see any benefit from it. Luckily we have a solution for you that does not require…

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Answer 6

There's a surprisingly easy way you can determine exactly what spring bars you have and therefore exactly what their tongue weight rating is. The bars are going to have dimples on them (see accompanying photo) which is going to tell you the bars…

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Answer 7

I spoke to my contact at Blue Ox and he informed me that the Blue Ox Base-Plate-to-Tow-Bar Lock #BX8859 that you referenced has a capacity of 10,000 lbs and has a plated steel finish, not quite chrome but close.

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Answer 8

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 9

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…

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Answer 10

Hey Travis, congrats on the new 2024 Jayco Flight 284BHS! Your travel trailer looks to have a GVWR of 7,950 lbs so I recommend going with the Equal-i-zer Weight Distribution w/ 4-Point Sway Control #EQ37121ET and pairing it with the Shank…

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Answer 11

For sag from towing a trailer the best recommendation I can make is actually a weight distribution system. Suspension enhancement will help level your truck while towing. But the advantage to a weight distribution system is that it levels the vehicle…

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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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