Mack Trucks

Keystone

Introduced 2026

1 documented generation

The Mack Keystone is a Class 8 vocational tractor introduced in 2026 for demanding highway, regional-haul and vocational applications. Building on the legacy of the Mack Pinnacle, Keystone combines heavy-duty capability with modern safety, comfort and connectivity technologies shared with Mack's newest truck platforms. It is designed for customers operating across highways, construction sites and challenging terrain.