By Heather Burlingame, Senior Production Editor | September 28, 2010

S190 Series AxleBilled as having the fastest axle ratio for a single reduction drive axle for the North American trucking industry, the S190 Series of single-drive axles is now available with a 2.53 ratio. The axle is designed to maximize fuel efficiency for emissions-friendly engines that operate best at lower rpm. Twenty-two ratios are available from 2.53 to 7.83.