GE14 26mm-38mm Grayston Spring Assister To uprate the rear suspension of cars, estates and light vans for towing caravans, trailers and vehicles carrying heavy loads Coil spring assisters are necessary because most standard car springs are designed for the comfort of the passengers and are not strong enough to take the extra loading of towing and heavy weights carried in the boot Manufactured in a hard rubber compound and can be fitted by the average DIY motorist without special tools Gap distance to suit 26mm – 38mm Note: Gap is determined by the measurement between the coils (daylight) approx. halfway down the spring, when the vehicle is jacked up by the body until the wheel is clear off the ground.