TEIN SB040-01200 Standardized Straight Coil Spring 4kg/mm 70mm ID 200mm Free Length

The TEIN SB040-01200 is a universal standardized straight coil spring designed for use in performance coilover suspension systems. Sold as a pair, this spring features a 4 kg/mm (223.6 lbs/in) spring rate, a 70mm inner diameter, and a 200mm free length, making it a popular choice for custom suspension tuning builds.

TEIN's standardized springs are manufactured in Yokohama, Japan to strict JIS quality standards. These straight-type springs maintain a consistent inner diameter from top to bottom, making them compatible with coilover systems that use standard-sized upper and lower spring seats.

Key Features:

• Spring Rate: 4 kg/mm (223.6 lbs/in)
• Inner Diameter (I.D.): 70mm
• Free Length: 200mm
• Type: Straight — uniform I.D. from top to bottom
• Material: SWOSC-KV silicon chrome steel (JIS standard) for maximum high-tension strength and endurance
• Construction: Special cooling formation process ensures stable quality, durability, and consistent performance
• Quantity: Sold as a pair (2 springs)
• Fit: Universal — compatible with coilover systems using a 70mm I.D. spring seat

TEIN standardized springs are an ideal solution for enthusiasts looking to fine-tune their coilover suspension setup. Available in a wide range of spring rates, inner diameters, and free lengths, these springs allow precise corner-weight balancing and spring rate adjustments for street, track, or competition use. A specified spring seat is required for installation; note that outer diameter may change with alignment.