Mack Launches Keystone Vocational Tractor, Redesigns Granite at ConExpo 2026

Key Details Mack Trucks unveiled two major vocational platforms at ConExpo-Con/Agg 2026: the all-new Keystone Class 8 tractor and a fully redesigned Granite model. The Keystone marks Mack's push to unify highway and vocational architectures under a common platform, bringing advanced safety features and driver-focused design to heavy-duty work applications. Why It Matters The Keystone is purpose-built for construction, agriculture, and severe duty on/off-road work. Named after Pennsylvania, where Mack manufactures all North American Class 8 trucks, the new model succeeds the Pinnacle line while incorporating technology from the Pioneer, Anthem, and redesigned Granite. Performance and Capability Powered by Mack's MP13 engine rated at 540 hp and 1,950 lb-ft torque, the Keystone pairs with the mDRIVE HD automated manual transmission for up to 6% improved fuel efficiency versus the Pinnacle. The tractor handles unpaved terrain, forests, and construction sites while maintaining highway performance. Market Expansion For the first time, Mack will offer this vocational tractor class in select Latin American markets, expanding the Keystone's reach beyond North America. Drivers get the same advanced safety suite and digital architecture found in Mack's highway truck lineup without sacrificing heavy-duty capability.