King Shocks SPR3-16-300 3.0" ID 16"300 lb/in Coilover Spring Blue for 2.5"Shocks

Vehicle Fitment

• Universal - fits all coilover shock absorbers with a 2.5" outside diameter body and a 3.0" spring perch seat. Compatible with King Shocks 2.5" coilovers and all other brands of 2.5" OD coilover shocks accepting a 3.0" ID spring.
• Verify the spring seat diameter and required free length on your specific shock before ordering. This spring has a 3.0" inside diameter, 16" free length, and 300 lb/in rate.

Fitment Notes

• The SPR3-16-300 is a 3.0" ID coilover spring designed for use on 2.5" outside diameter shock bodies. It is not compatible with 2.0" body shocks (which use the 2.5" ID SPR25 series) or 3.0" body shocks (which use the 3.75" ID SPR375 series). Confirm your shock body diameter before ordering.
• At 16" free length and 300 lb/in, this spring functions as a soft-rate single-rate primary spring for longer-travel 2.5" body coilover applications on lighter vehicles - providing compliant, long-stroke suspension behavior appropriate for builds where maximizing wheel travel and ride compliance over high-frequency terrain is the priority. The 16" length accommodates the longer spring perch spans found on higher-travel 2.5" coilover setups.
• Spring selection requires matching free length, rate, and ID to the shock travel and the vehicle's suspension geometry, weight, and intended use. Consult your suspension builder or King Shocks directly to confirm this spring is correct for your specific configuration.
• Sold individually - one spring per order. Most coilover applications require two or more springs per build; order the quantity needed.
• The spring rate of 300 lb/in is etched directly into the top coil for clear identification after installation and hard use.

Features

• 300 lb/in linear spring rate - a soft, compliant rate that maximizes ride comfort and wheel articulation over high-frequency terrain inputs on lighter vehicles running 2.5" body shocks; the low rate allows the suspension to move freely over small obstacles without transmitting harshness into the chassis while still providing progressive resistance as suspension loads increase through the travel range
• 16" free length - a longer primary spring dimension that provides extended working travel for high-travel 2.5" body coilover applications, accommodating the larger spring perch spans found on long-travel suspension builds and allowing the 300 lb/in rate to work across a wider range of suspension movement without approaching coil bind
• Wound specifically for off-road applications from the ground up - not repackaged automotive or industrial springs. King designs spring rate, wire diameter, and coil geometry exclusively for off-road suspension use, with every specification validated through real-world competition testing from Baja to Dakar
• High-tensile chrome silicon wire - the highest grade spring wire material, providing the tensile strength and fatigue resistance to maintain a consistent 300 lb/in rate across the full 16" travel envelope under repeated off-road suspension cycles without sag or rate degradation
• Closed and ground ends - both ends are precision ground flat for square, stable seating on spring perches without rocking, cocking, or producing lateral side loads on the shock shaft; correct end seating across a 16" spring length is essential for consistent, predictable spring behavior throughout the full stroke
• Blue powdercoat finish - provides corrosion resistance and visual identification within King's color-coded spring lineup; durable against rock chips, trail debris, mud, and UV exposure in off-road environments
• Spring rate etched on top coil - permanently etched into the metal before powdercoat application, remaining legible after installation and extended field use for rate confirmation without spring removal
• Compatible with King Shocks and all other brands of 2.5" OD coilover shocks - the SPR3 series is a universal spring line, not exclusive to King shock bodies
• Made in USA - manufactured to King Shocks' specifications using domestic production processes and materials
• Lifetime warranty against sagging and breakage - King covers these springs for life to the original purchaser; in the rare event of failure, replacement is provided with no questions asked

Specifications

• Part Number: SPR3-16-300
• Brand: King Shocks
• Spring Type: Coilover (Single Rate, Linear)
• Spring Rate: 300 lb/in
• Inside Diameter (ID): 3.0" (76.20mm)
• Compatible Shock Body OD: 2.5"
• Free Length: 16" (406.40mm)
• Wire Material: High-Tensile Chrome Silicon
• End Type: Closed and Ground
• Finish: Blue Powdercoat
• Rate Identification: Etched on top coil
• Fitment: Universal - King and all brands of 2.5" OD coilover shocks
• Quantity: Sold individually (1 spring per order)
• Made in USA
• Warranty: Lifetime against sagging and breakage

Included Components

• 1x King Shocks 3.0" ID x 16" x 300 lb/in Coilover Spring (Blue Powdercoat)

Product Description

The King Shocks SPR3-16-300 is a 3.0" inside diameter, 16" free length, 300 lb/in linear coilover spring for use on 2.5" outside diameter shock bodies. It is a universal spring compatible with King Shocks 2.5" coilovers and all other brands of 2.5" OD coilover shocks that accept a 3.0" ID spring. Sold individually. Made in USA. Lifetime warranty against sagging and breakage.

The 300 lb/in rate and 16" free length make this spring well suited as a soft-rate single-rate primary for lighter vehicles running longer-travel 2.5" body coilover setups - where the goal is maximizing suspension compliance and wheel travel over varied terrain rather than controlling the body motion of a heavier, more heavily loaded vehicle. The 16" length provides more usable working travel than the 14" primary variants, accommodating the extended spring perch spans of high-travel 2.5" coilover configurations without approaching coil bind prematurely at full compression. At 300 lb/in, the spring allows the suspension to absorb small and medium terrain inputs with minimal resistance, keeping the tires in contact with the ground and the chassis isolated from high-frequency chatter.

Like all King coilover springs, the SPR3-16-300 is wound from high-tensile chrome silicon wire developed exclusively for off-road use. The longer free length demands consistent wire properties and manufacturing precision across more coils to maintain the stated 300 lb/in rate evenly throughout the full stroke - King's chrome silicon wire and USA production standards deliver the accuracy and durability that off-road competition requires. Closed and ground ends ensure flat, square seating, and the rate is permanently etched into the top coil for field identification.