Eibach 1200.300.0350S ERO 12" x 3" ID 350 lb/in Off-Road Coilover Spring Silver

Vehicle Fitment

• Universal - fits any coilover shock or suspension system with a 3.000 in. (76.2mm) inside diameter spring perch
• Purpose-built for off-road coilover applications including long-travel truck/SUV suspension, prerunner builds, desert racing, rock crawling, and overlanding setups
• Compatible with bypass shocks, remote-reservoir coilovers, and long-travel race suspension accepting a 3.00 in. ID spring

Fitment Notes

• Confirm your coilover's spring perch inside diameter matches 3.000 in. (76.2mm) before ordering - this is the primary fitment dimension
• Verify that a 12.000 in. free length suits your coilover's designed travel range and desired ride height
• Sold individually - order two for a complete front or rear axle replacement
• The 350 lb/in. rate is suitable for medium-to-heavy off-road applications; consult your shock manufacturer or suspension builder for application-specific rate recommendations

Features

• ERO (Eibach Race Off-Road) series - engineered specifically for the elevated shock loads, high-frequency inputs, and extreme travel demands of off-road racing and recreation
• Manufactured from Eibach's proprietary Hi-Ten spring steel alloy for exceptional fatigue resistance under repeated high-impact loading
• CNC precision winding process ensures the highest linearity and rate consistency across the full 7.59 in. of available travel
• Each spring is individually tested and certified to its stated rate before leaving the factory
• Maximum travel in combination with one of the smallest block heights available for a 3.00 in. ID, 12 in. spring
• Silver powdercoat finish engineered for off-road environments - corrosion-resistant and highly visible for inspection in the field
• Ultra-lightweight steel construction minimizes unsprung mass relative to the rate for faster wheel response on rough terrain
• Trusted by professional off-road race teams competing in desert racing, rally raid, and extreme off-road events worldwide

Specifications

• Part Number: 1200.300.0350S
• Series: ERO (Eibach Race Off-Road)
• Free Length: 12.000 in. (305mm)
• Inside Diameter: 3.000 in. (76.2mm)
• Spring Rate: 350 lbs/in. (6.25 kg/mm)
• Block Height: 4.410 in. (112mm)
• Spring Travel: 7.590 in. (193mm)
• Load at Block Height: 2,657 lbs
• Color: Silver Powdercoat
• Weight: 5.36 lbs
• Quantity: Sold Individually (each)

Included Components

• 1x Eibach ERO Off-Road Coilover Spring (12.000 in. x 3.000 in. ID x 350 lbs/in.) - Silver

Product Description

The Eibach 1200.300.0350S is a 12-inch, 350 lb/in. coilover spring from Eibach's ERO (Eibach Race Off-Road) series - the silver-finished counterpart to the standard ERS race spring, engineered specifically for the rigorous demands of off-road suspension. At 3.000 inches inside diameter and 12.000 inches in free length, this spring is sized for long-travel coilover setups common in prerunner trucks, desert race vehicles, and purpose-built off-road platforms. With 7.59 inches of available travel before reaching block height and a load capacity of 2,657 lbs at full compression, it is built to handle the sustained high-amplitude inputs of rough-terrain driving without fatiguing or losing rate consistency.

Like all Eibach springs, the 1200.300.0350S is wound from proprietary Hi-Ten spring steel on CNC machinery, then individually tested and certified to its stated 350 lb/in. rate. The silver powdercoat is specifically chosen for the ERO off-road line for its durability in mud, water, and abrasive environments, as well as high visibility during post-run inspection. Order two for a complete axle set, and consult your shock manufacturer or suspension tuner to confirm whether 350 lb/in. at 12 inches is the right spec for your specific setup and vehicle weight.