Timbren Suspension Enhancement System

This SES suspension upgrade fits the trailer suspension with an underslung axle setup that has a 2-3/8 in. up to 3 in. diameter axle with 2 in. wide leaf springs. Each laser cut piece of steel is precision bent and powder-coated to ensure a quality fit. The hollow rubber springs are designed to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs the harder they work to prevent sag and stabilize the load. This kit is rated at 5,000 lbs. capacity. Even though you're increasing the spring rate by adding this upgrade, this does not increase the trailer's GTW. Please make sure that the load does not exceed the GTW (Gross Trailer Weight) set by the manufacturer.

Additional Information

Suspension solution for towing and hauling

Part Type

Suspension Rubber Helper Spring Kit

• Cushion Road Shocks
• Eliminate Trailer Squatting & Sagging
• Improve Handling
• Lifetime Warranty
• Works w/2-3/8 in. to 3 in. Diameter Axle w/2 in. Wide Leaf Springs

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Product Details

Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

SES Suspension Upgrade Universal Trailer Kits Medium Duty Underslung Trailer