A German automotive supplier has developed an innovation for a critical part in every car. Rheinmetall has invented a suspension spring that's up to 75 percent lighter than a conventional spring — ...

Circle Track: When tuning for a specific track, what areas of the car are the biggest factors. Jeff Smith: It depends on how close we are on the setup when we get there. We generally have three areas ...

If you own a 4x4, we know you've thought about suspension upgrades. Whether your dreams include building your rig monster-truck tall or simply replacing the shocks and springs under your work truck, ...