Leaf Springs for Trailer Carrying 20-ft Pontoon Boat
Question:
My 18 ft pontoon when pulling bounces up and down quite a bit and you have to slow down to get it to stop bouncing it has 25.25 4 leaf spring.would you go with a six leaf spring ? And would I need a u bolt kit to install and how do I measure the size of axle 2 or 3 inch.
asked by: Al
Helpful Expert Reply:
If your trailer has the correct carrying capacity for your pontoon boat and if the trailer's suspension is in good order you may not gain anything by switching to 6-leaf springs. Trailer leaf springs are made with varying numbers of leaves and they are selected based on their specific weight rating which needs to match the axle. Spring length also matter too, of course.
If the springs are rusted/badly worn you may just need new ones of the same rating. The double-eye leaf springs we have in your length of 25-1/4-inches are rated for different capacity axles, for example part # e68SR which is a 4-leaf spring rated for a 3500-lb axle.
All of our double eye springs are displayed on the linked page. Be sure to measure your leaf spring length when it is not under tension and choose the weight rating based on the axle weight capacity.
The linked article on trailer suspensions will be helpful; it includes the typical diameters for axles of various weight ratings. Your trailer's main sticker should have axle ratings or they will be found on the stickers or plates on the axles themselves.
Sometimes trailer bounce just happens from driving speed and there will sometimes be no better solution than slowing down. Note that trailer tires do carry speed ratings and for safety reasons you do not want to exceed that rating for your particular tires. Tires use a letter code for speed ratings, such as L for up to 75-mph and M for up to 81-mph, and these will be noted on the tire sidewall along with the required psi pressure for safe operation.
Product Page this Question was Asked From
etrailer Rust-Resistant 4-Leaf Double Eye Spring for 3.5K Trailer Axles - 25-1/8" - Dacromet
- Trailer Leaf Springs
- Double Eye Springs
- 3500 lbs
- 1-3/4 Inch Wide
- 4 Leaf
- 25-1/8 Inch Long
- Dacromet
- etrailer
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: 3-Leaf Slipper Spring w/ Flat End for 2,900-lb Trailer Axles - 30" Long
- Q&A: Recommended Leaf Spring Capacity for a Conversion Boat Trailer
- Q&A: What Is Normal Deflection Of Leaf Springs On Trailer
- Shop: 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long
- Shop: 4-Leaf Slipper Spring w/ Radius End for 2,000-lb Trailer Axles - 24-5/8" Long
- Shop: 4-Leaf Slipper Spring w/ Radius End for 2,000-lb Trailer Axles - 24-5/8" Long
- Shop: 3-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 23-1/8" Long
- Shop: 3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long
- Shop: 4-Leaf Slipper Spring w/ Flat End for 3,700-lb Trailer Axles - 30" Long
- Q&A: How Far do Trailer Springs Typically Compress
- Q&A: Can I Put the Leaf Springs on Top of the Axle to Give me More Tire Clearance
- Article: How to Raise Your Travel Trailer Height
- Search Results: boat trailer axle
- Video: Review of CE Smith Trailer Axles - Leaf Spring Suspension - CE33201GA-HUB
- Shop: Suspension Enhancement
- Q&A: How To Measure To Make Sure The MORryde CRE3000 Equalizers Will Fit Your Trailer
- Search Results: leaf spring
- Article: How to Accurately Measure Trailer Leaf Springs
- Q&A: How to Determine Hanger Spacing for Tandem Axle Trailer Suspension with 26 Inch Springs
- Search Results: leaf springs
- Article: Double-Eye Trailer Suspension System Review
- Shop: Trailer Hitch
- Article: 5 Tell-Tale Signs It’s Time to Replace Your Trailer’s Leaf Springs
- Q&A: Best Cushioned Equalizer Replacement for Equalizer that is 6 inches Wide
- Search Results: trailer leaf springs
- Shop: Trailer Wiring
- Shop: Fifth Wheel Hitch
- Video: MORryde Tandem Axle Trailer Suspension Upgrade Kit Installation
- Search Results: equalizer
- Shop: Brake Controller