The SD-122 TF Series of soil compactors from Ingersoll Rand features a full-time micro-processor traction system for increased performance in steep grade conditions. Two smooth-drum models, the SD-122D and SD-122DX, have rolling widths of 84 inches and are for use in granular soils. These machines have operating weights of 26,460 and 27,000 pounds, respectively, and generate a centrifugal force of 63,200 pounds. The SD-122F padfoot model weighs 28,780 pounds and produces a centrifugal force of 65,900 pounds. Padfoot shell kits are available. Estimated price: $165,000.