How to Pick Out Correct Shackle Length for Trailer Suspension
Updated 03/28/2017 | Published 03/27/2017
Question:
I have a pop up camper that I want to convert from a slipper spring set up to a doubly-eye set up. Id like to re-use the existing hangers if possible. Just grind out the cylinder that is welded in the existing rear hanger so it can accept a bolt and shackle. After measuring, I got roughly 25.5inch from hole to hole on my existing hangers, so I think the SP-212275 leafs will work. How would I go about determining what length shackle to put on there?
asked by: Jeff
Expert Reply:
Well shackle length is mainly based on the height difference between the front and rear hangers. The rear hanger normally doesn't hang as low as the front so that the shackle can offset the difference and add the ability to move.
What is the height difference from the frame of the trailer to the hole on both hangers? With that we can see what would work best as a shackle. You want to go with the shackle length that allows the spring to sit as level as possible.
The most popular size is 2-1/4 inches like the part # TRSL225.
Product Page this Question was Asked From
- Trailer Suspension Parts
- Shackle Links
- Camper
- Car Hauler
- Utility Trailer
- 2-1/4 Inch Long
- TruRyde
more information >
Continue Researching
- Shop: MORryde Suspension Upgrade Kit for Tandem Axle Trailers - 3-1/8" Long Shackle Straps
- Shop: Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs
- Search Results: trailer suspension parts
- Search Results: bronze bushing
- Search Results: bronze bushing trailer leaf springs
- Shop: Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double-Eye Springs
- Search Results: trailer brakes
- Search Results: spare tire mount
- Shop: Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double Eye Springs - 2-1/4" Links
- Shop: MORryde Rubber Equalizers for Tandem Axle Trailers - 33" Wheelbase - 8K
- Shop: Terran Axle Tandem-Axle Hanger Kit for Double Eye Springs - 3-1/4" Tall Front
- Search Results: shackle
- Search Results: spring seat
- Shop: U-Bolt Kit for Mounting 5,200-lb to 7,000-lb, Round Trailer Axles - 7" Long U-Bolts
- Q&A: Can Longer Shackle Straps be Added to Tandem Axle Trailer
- Q&A: Determining Correct Shackle Strap Size for Top Brand Tandem Axle Trailer
- Article: Double-Eye Trailer Suspension System Review
- Q&A: Availability of Replacement ABS Brakes for 2024 Grand Design Momentum 395MS
- Q&A: Wet Bolt Kit for 2025 Keystone Coleman Light 17RX
- Article: How to Raise Your Travel Trailer Height
- Video: Review of Lippert Trailer Hubs and Drums - Hub with Drum ABS - LC27PX
- Q&A: Does Lippert 12" Electric Brake Assembly ABS Need To Be Programmed Or Paired For Setup?
- Video: Review of Lippert Trailer Suspension Parts - Equalizer Upgrade Kit - LC145546
- Video: Review of Lippert Trailer Brakes - Electric 12 Inch L R Trailer Brake Assemblies ABS Hubs - LC83PX
- Video: Review of Lippert Electric 12 Inch Right Hand Trailer Brake Assembly ABS Hub - LC22NX
- Q&A: Should Shackle Straps Angle Towards the Axles or Away From Them
- Video: A Closer Look at the Lippert AP Kit
- Q&A: Determining the Correct Leaf Spring Length for Trailer
- Video: An In-Depth Look at the MORryde X-Factor Crossmember for Standard Frame Hangers
- Article: How to Accurately Measure Trailer Leaf Springs
on Trailer Suspension Parts
