AST Linear Race Springs - 140mm Length x 150 N/mm Rate x 61mm ID - Single

AST is a well-known name in the performance suspension world, and these linear race springs are a solid option for track-focused builds. This particular spring measures 140mm in length with a spring rate of 150 N/mm, and it has a 61mm inner diameter, making it suitable for many coilover applications where precise control is needed.

Linear springs offer a consistent spring rate throughout their travel, meaning the force required to compress the spring increases predictably as it's compressed. This predictability is crucial for tuning suspension response on a race car or a performance street setup. The 61mm inner diameter is a common size for many performance coilovers, and the 140mm length helps achieve the desired ride height and suspension geometry when paired with appropriate damping components.