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The fact your outer bearing fits on a .75 diameter spindle means we aren't going to have a standard bearing kit to fit since that's not a standard dimension. Can you get me the C dimension as well? It could be that you need the part…

I attached a chart that has all of the recommended lug nut torque specs for trailer wheels. Based on your studs being 1/2 inch, your wheels being 15 inches in diameter, and your lug nuts being coned you would want to torque your lug nuts to 90-120…

After you've packed the bearings and assembled everything, carefully slide the hub assembly onto the spindle and install the outer bearing. Install the spindle and tang washer and run the spindle nut down finger tight, then rotate the hub back…

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…

If the leaf spring part #e57SR that you referenced matches up dimensionally to what your trailer has and has a capacity that is 400 lbs more than needed it would work just fine. Having a bit extra capacity for the leaf springs would not cause an…

Trailer wheel bearings are specific to the spindle that is installed on the axle that is on your trailer. You will need to safely support the trailer, remove the wheel and tire, remove the grease cap, remove the cotter pin and washer that secures the…

The correct lug nut torque for any given trailer wheel depends on a few things. You can refer to the linked diagram that provides a range of values depending on the factors like stud size and wheel material. For 1/2-inch studs with coned lug nuts for…

Having 5 inches above the trailer tire or no less than about 4 inches when the trailer is loaded is perfect. A leaf spring suspension will allow the axle to rack to a certain degree, so to prevent the tires from rubbing I'd allow the same 4-5…

We usually tell people to look for about 3 inches of clearance to account for the total travel capabilities of trailer suspension. If you have less than 3 inches you might be able to compensate by using slightly longer shackle straps. I have included…

The Timbren axle-less suspension kits are offered in either 4-on-4 or 5-on-4-1/2 bolt patterns; none is available with a 8-on-6-1/2 pattern idler hubs. All such kits are shown on the linked page. Several of these 3500-lb kits, parts #ASR3500S06,…

Thanks for the picture of your trailer and truck. The Timbren Heavy-Duty Axle-Less Trailer Suspension 4" Lift Spindle - Off-Road Tires item #ASR35HDS02 you were looking at would work with your trailer but it might be a bit excessive as it is…

To correctly measure a leaf spring, you'll want to jack the trailer up on jack stands so the axle is hanging freely, then measure directly across from the center of one spring eye to the other, as shown in the provided diagram. The height of the…