Let’s be honest. The customer service team at Timbren gets calls from customers all the time who think the load they’re hauling requires a “severe service” kit. Somehow they think ‘more’ is better. The truth about “severe service” is… not everyone needs it! You may ask, “What’s so special about a severe service kit?” Good question. The secret of a severe service kit is found in the style of the hollow rubber spring. Most rubber springs used on pick-up trucks are double-convoluted, providing a perfect blend of capacity and ride quality. But the rubber springs used for “severe service” are single-convoluted. Unless you’re hauling a slide-in camper or using a salt spreader, you do not need a severe service kit. Why? Compared to the double-convoluted style, single-convoluted springs are shorter and wider, designed to resist weight more aggressively. The result is reduced ride quality in exchange for more stability.