Kelderman Manufacturing is a Midwestern producer of aftermarket air suspension systems for ¾ ton and larger trucks. Based in Oskaloosa, Iowa, Kelderman has over 50 years of experience with agricultural and automotive products. Our family-owned business was built on Midwestern values and continues to operate with those beliefs to this day. From the quality of products we engineer, manufacture, and market to the dedication in serving every customer that walks through the door, Kelderman is dedicated to our customers.