Allstar's radiused climbing pinion mounts for quick change rear ends feature cam style adjusters for quick and easy setup of the j-bar or Panhard bar. Pinion mounts that feature a single cam adjuster have a threaded back nut that slides with the adjuster for easy single wrench adjustments. Also available is the double cam adjuster that has a cog style front and rear adjustment that is keyed together for smooth adjustments. Aluminum mounts replace the front pinion plate on most quick change rear ends and the steel mount is used with the original pinion plate. Having Radiused mounting slots eliminates the need to adjust the J-bar or panhard bar length.