Regardless of tillage preference or row width, Unverferth has the extensions you need to center wheels down the middle of the row. From dual- and triple-axle spacers to MFWD hub extensions, Unverferth extensions keep your wheels on the track. Dual and triple spool-type extensions are constructed of cast ductile iron for greater durability and longevity. MFWD front hub extensions let you straddle four 30” rows and MFWD drum style hub extensions are available for popular makes and models of today’s tractors. Custom-built extensions are also available to meet most every other wheel spacing need.