Why Do Trucks Still Use Leaf Springs Instead of Modern Suspension?

Why do modern trucks still use leaf springs when coil springs and air suspension offer newer alternatives? The answer goes far beyond strength, durability, and cost. Leaf springs have been around since the days of horse-drawn carriages, yet they remain an important part of many modern pickup trucks and heavy-duty vehicles. So what makes this old suspension design so useful? In this video, we'll explore how leaf spring suspension works, why it handles heavy loads so effectively, and the surprising second job it performs: helping keep a truck's rear axle in position. We'll also compare leaf springs with coil springs and air suspension, explain how helper springs respond to extra cargo, and uncover the compromises that come with this simple but clever engineering design. From rough roads to fully loaded truck beds, discover why leaf springs have survived for generations—and why newer technology hasn't made them obsolete. If you drove a pickup truck every day, would you prefer a smoother ride when empty or better support under heavy loads? Let us know in the comments! Subscribe to Small Things for more fascinating explanations of everyday engineering, technology, and the hidden science behind familiar objects. #LeafSprings #TruckSuspension #HowThingsWork --- Timestamp: 00:00 - Intro - The Suspension That Refuses to Disappear 01:10 - From Horse Carriages to Heavy Trucks 02:25 - What Actually Happens When a Leaf Spring Bends? 03:56 - The Hidden Job Most People Never Notice 05:30 - What Changes When a Truck Carries a Heavy Load? 06:59 - Why Not Replace Them With Something Modern? 08:46 - The Price of Keeping Things Simple 10:08 - Why This Old Design Still Makes Sense --- ✨ About Small Things Small Things is created by Sarah, Maez, and Hassan — a small team who loves exploring the hidden stories behind simple things and small things. 🤖 Disclaimer: We may use AI tools to support research and production, but every video is reviewed and edited by our team. We respect copyright, original work, and YouTube’s policies. Thank you for supporting us. 🙏 If you notice any issues, please contact us at [email protected] #smallthings #simplethings