Why don’t they match?

Ever notice your car says you’re doing 70 MPH while your phone’s GPS says 67? So which one is actually right? In this video, we’re breaking down how your car calculates speed, how GPS can figure out your speed using signals from space, and why the two numbers don’t always agree. We’ll also look at how tire wear, low tire pressure, and different tire sizes can change what your speedometer tells you. And the faster you go, the more obvious the difference can become. Sometimes your car is right. Sometimes your GPS is right. And sometimes… something else is going on. Thanks for watching CRS Off-Track! Don’t forget to subscribe for more everyday automotive mysteries explained. 🔗 Support the Channel & Stay Connected Amazon Storefront 👉 https://www.amazon.com/shop/crsfirearms Direct Support (Cash App) 👉 https://cash.app/$hooverfamily1520 ⸻ 📬 Mail & Correspondence If you’d like to send letters, parts, or project-related items: CRS Off-Track P.O. Box 223 Coloma, WI 54930 ⸻ ⚠️ Disclaimer I am not a licensed mechanic, engineer, or automotive technician. The content on this channel is presented for educational, informational, and entertainment purposes only. Always verify specifications, procedures, torque values, tuning data, and safety requirements before working on any vehicle. Improper modifications, repairs, or maintenance can result in vehicle damage, personal injury, or death. Work at your own risk.