Top 100: Axle-Back Gets Tallest Frame

September 28, 2010

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.

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