Redline Trailer Suspension - Leaf Spring Suspension - APT4 Review Video

We don't carry the MR4 leaf springs but based on my research they look like they are 26 inch double-eye springs like part #e94SR. For springs of this length and the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs #APT4 the hangers are…

Based on my research, when using the Universal Group Leaf Springs #SP-222275 that has a spring eye length of 24-7/8 inches with either the Redline Tandem Axle Hanger Kit #APT4 or #APT3HD, you will want a distance of 29-1/2 inches between the…

The hanger spacing for the #APT4 with 25-1/8" leaf springs is 27-3/4" on center. I have attached a drawing for your reference.

The center hangers in the Tandem-Axle Trailer Hanger Kit #APT8 that you recently purchased are indeed longer. This is actually pretty common for tandem axle trailers. The reason for the extra length on the middle hanger is related to the shackle…

To improve your trailers rough ride and absorb road shock I would start by replacing your trailers equalizers with a shock absorbing equalizer system. The Equa-Flex Cushioned Equalizers part #LC279687 is designed for tandem axle trailers with…

Placement of the axles depends on several factors and there is a formula that you can follow to determine the best placement of the axles. Take a look at the picture I have included which explains how to determine where axles should be placed. Once…

The Dexter Heavy Duty Suspension Kit #K71-360-00 is designed for 33 inch axle spacing. To add your third axle, you cannot simply add a hanger spring and axle. You can keep your 35 inch spacing but you will need to relocate your hangers. I've…

First, the most important thing I can tell you is that mobile home axles are made for one time use and should not be used on utility trailers; for that you would need an axle designed for use on RVs and to choose the correct replacement axle for your…

The correct replacement axle for a Quality 3500 Lb 95 HF 80 SC is the Dexter Trailer Axle Beam with E-Z Lube Spindles part #7359765. This option will be a direct replacement with no modifications needed. If you want to replace the brakes and…

If you used the Dexter Equalizer kit part #K71-359-00 that you referenced the distance between the axles would be 33 inches.

I am happy to help! Starting with the two holes in the shorter hangers included in the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 4-1/2" Center #APT8 you were looking at. Those holes are not for bolting but…

Thank you for submitting the photo of your boat trailer showing the center spring hanger, shackle straps and equalizer. Based on the photo it does appear that non-standard replacement parts may have been used to repair or modify the suspension at…