Chryser (FCA US LLC) is recalling certain model year 2014-2015 Ram 4500 and 5500 cab chassis trucks manufactured August 20, 2013, to January 27, 2015 and equipped with 6.4L Hemi engines. The affected vehicles have a maximum governed speed of 106 mph but are fitted with tires that are only rated for a maximum speed of 87 mph.