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. Grayston coil spring assisters are manufactured in a hard rubber compound and can be fitted by the average motorist without specialist tools. They are progressive in operation and GE14 suits vehicles with a spring gap of between 26 – 38mm. To determine the distance of the gap between springs, measurement is taken halfway down the spring with the vehicle jacked up by the body until the wheel is clear of the ground. PRICE FOR A PAIR