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Item #:
23708821
2 Pairs of SW4B Trailer Spring - 25-1/4" Double Eye 4-Leaf Spring 1-3/4" Wide for 3,500 lbs (3.5K) Trailers (1750 lb Capacity Per Spring)
Item #:
23708821
BND 306
Price Details
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Imported from USA store
QTY:
Order now and get it around Thursday, August 13
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What Stands Out
Heavy-Duty Capacity
Designed to support up to 3,500 lbs, these springs ensure robust performance for medium-duty trailers, providing the necessary strength for reliable transport of heavier loads.
Durable Construction
Constructed with four durable leaves, each spring offers exceptional resilience against wear over time, making them perfect for regular use in varying terrain conditions.
Easy Installation
The double eye design allows for straightforward mounting, enabling users to quickly replace old springs with minimal tools, saving time and enhancing user convenience.
Product Details
- SW4B Trailer Spring - 25-1/4" Double Eye 4-Leaf Spring 1-3/4" Wide for 3,500 lbs (3.5K) Trailers (1750 lb Capacity Per Spring)
- Length from center of spring eye to center of spring eye: 25-1/4"
- Spring width: 1-3/4", Eye diameter with bushing: 9/16"
- Leaf Thickness 5/16", Number of leaves: 4
- Equivalent to UNA212, UNA-212, SW4B, PR4B, LIB-401-DE, 93184, 9150014, 72-42, 72-042, 4 LEAF, 3500, 25-1/8, 124903
Product Technical Details
| Manufacturer | M-Parts |
| Brand | M-Parts |
| Item Weight | 45.7 pounds |
| Package Dimensions | 28 x 11 x 3 inches |
| Manufacturer Part Number | SW4B |
Who Should Buy?
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Lightweight Trailers
Ideal for lightweight trailers needing reliable suspension support without heavy-duty requirements.
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DIY Enthusiasts
Perfect for DIY projects where users need affordable and easy-to-install trailer springs for customization.
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Budget-Conscious Users
A cost-effective choice for users wanting to replace worn-out springs without breaking the bank.
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Heavy-Duty Use
Not suitable for heavy-duty trailers requiring springs that handle higher weight capacities and stress.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What are the specifications of M-Parts SW4B Trailer Spring?
Answer: The M-Parts SW4B Trailer Spring features a double eye design, comprised of 4 leaves, and is 1-3/4 inches wide. Each spring has a capacity of 1,750 lbs, making the total capacity for the pair suitable for trailers weighing up to 3,500 lbs. This robust construction ensures effective load distribution and reliable performance, ideal for various trailer applications. -
Question:
What types of trailers can benefit from these springs?
Answer: These trailer springs are versatile and can be used with standard 3,500 lbs trailers, such as utility trailers, cargo trailers, or even boat trailers. The double eye design and appropriate capacity make them suitable for applications requiring stability and durability, ensuring a smoother ride and reliable support for the load. -
Question:
How do I install the M-Parts SW4B Trailer Springs?
Answer: Installation requires a few tools, such as a wrench and a jack, to safely lift and support the trailer. Start by removing the old springs, then align the new springs to the mounting brackets and secure them. Proper installation is crucial for optimal performance, so attention to detail ensures your trailer's suspension operates smoothly for various towing needs. -
Question:
What is the advantage of using 4-leaf springs compared to 2-leaf springs?
Answer: 4-leaf springs provide enhanced stability and load-bearing capacity compared to 2-leaf springs. They distribute weight more evenly, reducing the risk of spring failure and improving overall ride quality, especially under heavy loads. This makes them an excellent option for users who frequently transport substantial equipment or cargo. -
Question:
Can M-Parts trailer springs be used in off-road conditions?
Answer: Yes, the M-Parts trailer springs are designed to withstand various terrains, including off-road conditions. Their robust construction and ability to handle rough surfaces make them suitable for users who take their trailers on adventurous journeys, ensuring reliable performance under challenging circumstances. -
Question:
What maintenance is required for trailer springs?
Answer: Regular maintenance includes inspecting the springs for signs of wear or damage, cleaning any debris, and checking the mounting hardware for tightness. Keeping the springs lubricated can also enhance their performance and lifespan. This routine check ensures the springs remain effective, promoting safe towing practices. -
Question:
What weight capacity do these springs support in practical usage?
Answer: With a capacity of 1,750 lbs per spring, the M-Parts SW4B Trailer Springs can effectively support a total of 3,500 lbs when used in pairs. Practical usage includes towing vehicles like small boats or landscaping equipment, where it's essential to balance load distribution for safe transport. -
Question:
Are the M-Parts trailer springs suitable for replacement on existing trailers?
Answer: Absolutely! The M-Parts SW4B trailer springs can be used as a replacement for existing suspension systems, provided they match the specifications of the previous springs. Ensuring the right fit is crucial for maintaining the trailer's overall function and safety during use. -
Question:
Can I buy M-Parts 2 Pairs of SW4B Trailer Springs in Brunei?
Answer: Yes, you can conveniently purchase M-Parts 2 Pairs of SW4B Trailer Springs at Ubuy in Brunei. Ubuy offers a range of products, ensuring you receive high-quality trailer components that meet your needs. Check their website for detailed information and availability. -
Question:
What makes the M-Parts SW4B springs a good investment for trailer users?
Answer: Investing in the M-Parts SW4B springs means choosing reliability, durability, and enhanced load management for your trailer. With their 4-leaf design and high capacity, they contribute to safer towing experiences and reduced wear on your trailer. This is particularly beneficial for those who frequently haul equipment or travel long distances.
M-Parts Springs Editorial Review
This product is a set of leaf springs for trailers with varying weight capacities. When customers had questions about the product, such as the inclusion of bushings or the compatibility with their specific trailer, M-Parts was able to promptly answer their questions. The leaf springs were generally well-received, with most customers noting that they were easy to install and provided good value for the money. However, one customer reported that the springs sagged after a relatively short trip and were unable to handle the weight load, causing tires to rub. Another customer cautioned against overloading the trailer, as these leaf springs are only intended for trailers with certain weight capacities. Finally, customers found that the product description was accurate and that the product arrived before the due date.
Customer Reviews & Ratings
73 customers ratings
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5 Star
80%
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4 Star
7%
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3 Star
5%
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2 Star
0%
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1 Star
8%
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Pros
- Provides good value for the money
- Easy to install
- Overall positive customer experience
Cons
- May not be able to handle heavy weight loads
Platform Trust & Buyer Confidence
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Mohammad
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“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
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BND 306
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