ROC - from Europe's leading spring manufacturing group - offers the widest range of standard and heavy-duty replacement springs in the market. Produced in Lesjöfors, Sweden using cold coiling technology, every ROC spring undergoes a multi-stage manufacturing process to ensure optimum performance and the longest possible service life. All ROC springs are subject to shot peening after coiling, a process which bombards each spring with millions of tiny steel balls to introduce a positive residual stress in the spring; improving fatigue strength and preventing premature breakage. ROC springs are protected from corrosion by a chemical compound called Zinc Phosphate, which offers galvanic or 'sacrificial' protection via preferred oxidisation, i.e. the zinc corrodes before the spring steel, and generally at a slower rate, prolonging the life of the spring. Each spring is then coated with epoxy powder resin paint via electrostatics, providing further corrosion protection. Every ROC spring is inspected and tested to ensure it meets the highest quality standards, then marked with a production code and batch number to secure full product traceability. Safety For safety, suspension springs should always be replaced in axle pairs. Different springs on the same axle may cause an imbalance in the suspension, adversely affecting vehicle handling and braking. ROC's guarantee applies only when springs have been replaced in axle pairs. Always check the spring size and end shapes are correct prior to attempting fitment. Springs should be fitted with the same orientation as the original equipment spring. Appropriate care should be taken when replacing a spring. A compressed spring holds a huge force and could cause serious injury if it came loose during fitment. Special tools should always be used to compress a spring. For safety, spring installation should only be undertaken by a competent person and instructions from a recognised repair manual should be followed. Spring pans, bushings and link-arms should always be checked for damage and replaced if necessary. After installation, springs should be checked to ensure they are correctly located at the ends and are not too short or loose. Wheel alignment should also be checked. All ROC springs are manufactured in accordance with ISO9001 & ISO14001, and in a IATF16949 environment.