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Mount your round, 3" diameter axle to your trailer's leaf springs with this U-bolt kit. U-bolts, plates and nuts included.
Features:
Specs:
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we'll be reviewing Part Number APUBR-9. This is Red Line U-Bolt Kit for mounting 5200 lbs to 7000 lbs round trailer axles. It's going to attach the trailer axle to your leaf springs, it's going to include four 7 1/4 U-bolts, 2 U-bolt plates for 1 3/4 inch or 2 inch springs, and then it's going to include eight 9/16 inch hex nuts. Spring seats are required for mounting the axle to the leaf springs and that's all going to be sold separately. It's going to fix axle diameters of 3 inches, typically 5200 lb to 7000 lb trailer axles. The spring width that this would fit is going to be 1 3/4 inch or 2 inch and we'll just take a few moments to go over some dimensions. We take a measurement of the length of the u-bolt, again we're measuring from the bottom of the cross member, to the base of the bolt post.
It's going to give us a measurement of 7 1/4. The threaded portion on each bolt is going to measure 3 inches. It's that portion there and then the width that we have in between is going to measure right at 3 inches and that's just a measurement between the bolt posts. Taking a look at one of the plates, it's going to measure 5 1/4 by 3 3/4. We measure the distance, center on center between the holes going this direction, it's going to measure 3 3/4 of an inch and then center on center going this direction is going to give us a measurement of 2 5/8 of an inch. That's going to do it for our look at Part Number APUBR-9, this is Red Line U-Bolt Kit for mounting round trailer axles and again the bolts are going to measure 7 1/4 of an inch in length.
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Average Customer Rating: 4.8 out of 5 stars (175 Customer Reviews)
Mount your round, 3" diameter axle to your trailer's leaf springs with this U-bolt kit. U-bolts, plates and nuts included.Excellent parts for the project I was working on. I installed a 1997 Chevy axle on a 1950 International box trailer. With a few “adjustments”, I made it work!
Worked great for my application. Quick shipping, pricing was best around.
Alexander P - 03/28/2021I chose this particular kit mainly for the 9/16" u-bolts. I could have easily used the 1/2" kit but it was a nice upgrade and not much difference in cost. These u-bolts and plates fit my car trailer perfectly without any modifications. Everything in product description was just what it said when I received them. Shipping was faster than I expected!
Delivered as promised and installed as required. No problems with service and the product. Excellent company to do business with. Always glad to have etrailer available for go to supplies at lowest cost.
I had rusted old bolts and leaf springs, these were great replacements. No issues look great work well and fast shipping.
Made these work. My original bolts were smaller and these had to be "made to fit", but these won't break.
Michael L - 09/18/2020These parts made installing the new springs much easier than struggling with rusty ones.
I finished installing my new springs on my trailer today. Every thing went together without any problem.i am very pleased with your product.
3 U-bolt kits, the hangers, rockers, etc. kit for a triple axle trailer, and 3 new sets of leaf springs went on a home-made 25' gooseneck we converted from 2 axle to 3 axle. We had no problems at all with the trailer since installation, and we've had it loaded down pretty well with logs, lumber, tractors, and equipment. Everything has held up well after several hours of service on the road and off-road. etrailer has always been great to work with, have had fast, accurate delivery, and timely updates on order status, etc. We've never had a problem, so I can't say how well Customer Service is!
I orderd u bolts and when we went to use them found the nuts that came with them was coarse threads instead of fine. We purchased the correct ones and then found they would not tighten all the way up do to threads being flattened half way up the u bolt. Had to end up using some old ones I had to complete the install of springs on trailer.
Victoria B - 11/25/2019I was happy with the fast free delivery. There was just one problem. There was 8 washer's missing in the sack of nuts for the u-bolts. I just installed the u-bolts with no washers
Heather A - 07/02/2020 Heather A - 07/02/2020Great product, I get everything I need for my fleet of goosenecks, brakes,springs,hitches all shipped right to my po box
Package arrived as promised Quick delivery Rep Mariah was very helpful and pleasant to deal with! This is second order from etrailer and I will probably now use them exclusively for all my trailer needs!
I bought new leaf springs and all the hardware to go with them. The only thing that was missing with this hardware was lock-washers. There were lock washers on the old springs so I thought it would be a good idea to have them on the new springs. These U bolts were thicker than the ones that I replaced so I had to get new washers at the local hardware store.
Replaced the 4 leaf leaf springs on my 5th wheel with the 5 leaf leaf springs and the mounting kit, so far it seems to have solved the problem of the springs breaking. The trailer handles better then ever on the highway and the back roads. Couldn't be happier.
robert s - 04/06/2018perfect fit, easy to assemble and great quality
Great product, easy to install. Would purchase again.
Etrailer is the perfect place to get anything. It's great products and fast delivery is on spot. I'll use this site for everything I need cause they have it all too. Thank etrailer your the best. I bought u bolts the last 2 orders and they were perfect quality.
etrailer made this whole process as easy as possible. Chose the 3 to 5 day shipping got it in three days. The package was intact all the parts were there and the instructions were very good. I even went on the products website and checked out their installation videos. Those were also very helpful. As usual etrailer took good care of me. To steal a quote “I’ll be back”
good quality parts
After 30 years and many miles of towing, my trailer suspension finally succumbed to the ravages of Michigan roads and the salt used on them. I replaced the original single leaf spring suspension with a new multi-leaf system from etrailer.com and couldn't be happier with the results. The trailer tows much nicer now and with everything new and tight my tires are wearing at a much slower pace. I have since ordered a hitch coupler rebuild kit from etrailer.com which installed easily and is working very well. I wouldn't hesitate to recommend etrailer.com to anyone.
Worked great
The fit was perfect didn’t even have to trim the bolts
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