Flightscope TheStack Swing Speed Trainer

The Stack System by FlightScope – Your Science-Based Speed Trainer

The Stack System is a groundbreaking variable-inertia speed training tool designed to increase your clubhead speed with precision and efficiency. Developed with biomechanical insights from Dr. Sasho MacKenzie, this high-tech system blends hardware, app-based guidance, and AI-driven programming to deliver measurable swing speed gains.

Premium Build & Customizable Resistance

Featuring five CNC-milled stack weights and a performance-engineered shaft (available in Adult 41.5″ or Junior 38.5″ versions), the system offers 30 unique weight configurations—from light to heavy—delivering versatile inertial training tailored to your current ability. The included dual-purpose storage case also functions as a phone stand for ease of use. [oai_citation:0‡FlightScope Golf US Store](https://flightscope.com/products/the-stack-system?utm_source=chatgpt.com)

Smart Training with TheStack App

• Guided Workouts: The Stack App generates dynamic training programs based on your baseline speed session, adapting as you improve. [oai_citation:1‡FlightScope Golf US Store](https://flightscope.com/products/the-stack-system?utm_source=chatgpt.com)
• Hands-Free Data Entry: Voice-entry technology allows you to record swing speeds verbally (even via AirPods), keeping you in the rhythm. [oai_citation:2‡FlightScope Golf US Store](https://flightscope.com/products/flightscope-mevo-and-thestack-system?utm_source=chatgpt.com)
• Metrics & Progress Tracking: Monitor Stack Speed, Distance Potential, Clubhead Speed, and Grit Score. Post-program reviews and progress checks ensure your training evolves intelligently. [oai_citation:3‡FlightScope Golf US Store](https://flightscope.com/products/the-stack-system?utm_source=chatgpt.com)

Why It’s Different

• Biomechanics-driven system developed by Dr. Sasho MacKenzie, trusted by elite golfers. [oai_citation:4‡The Wandering Golfers](https://thewanderinggolfers.com/the-stack-system-definitive-review/?utm_source=chatgpt.com) [oai_citation:5‡The Stack System](https://www.thestacksystem.com/?utm_source=chatgpt.com)
• Adaptive training—not one-size-fits-all—responds to your performance, fatigue, and recovery. [oai_citation:6‡The Wandering Golfers](https://thewanderinggolfers.com/the-stack-system-definitive-review/?utm_source=chatgpt.com) [oai_citation:7‡Big Tees Golf](https://www.bigteesgolfworld.com/the-stack-system-review/?utm_source=chatgpt.com)
• Compatible with launch monitors like FlightScope Mevo+ and others for seamless tracking integration. [oai_citation:8‡Golf Simulator Forum](https://golfsimulatorforum.com/forum/flightscope/409838-the-stack-system-and-mevo?utm_source=chatgpt.com) [oai_citation:9‡FlightScope Golf US Store](https://flightscope.com/products/flightscope-mevo-and-thestack-system?utm_source=chatgpt.com)

With precise hardware, intelligent programming, and personalized analytics, The Stack System offers a gym-level, neuromuscular approach to speed training—no random swings, just efficient gains in your swing speed and distance.