Top 100: Axle-Back Gets Tallest Frame

Granite Axle BackMack replaced the last of its R-model ancestry with the Granite Axle Back. The front axle is set 50½ inches behind the front bumper — that's 20½ inches further back than the standard Granite and the Granite Bridge Formula. The high-capacity Cornerstone frame, with taller main rails, is standard equipment. Flaring the frame rails up front allowed Mack to increase the radiator size.

Sept. 28, 2010
Mack replaced the last of its R-model ancestry with the Granite Axle Back. The front axle is set 50½ inches behind the front bumper — that's 20½ inches further back than the standard Granite and the Granite Bridge Formula. The high-capacity Cornerstone frame, with taller main rails, is standard equipment. Flaring the frame rails up front allowed Mack to increase the radiator size.