About
The Stack System is a comprehensive golf speed training solution that bridges the gap between Tour-level biomechanics coaching and everyday golfers. Developed by Dr. Sasho MacKenzie—widely regarded as golf's leading biomechanist—The Stack System delivers scientifically-backed speed training previously accessible only to professional Tour players. At its core, the system includes precision CNC-milled Stack weights that combine with a custom-engineered shaft and hardware to create 30 unique weight combinations, enabling dynamic variable inertia training sessions. Paired with the award-winning TheStack App (available on iOS and Android), golfers receive guided training programs, built-in timers, effortless data entry, and AI-powered algorithms that adapt programming dynamically as speed levels improve. To track performance, users connect a compatible speed radar device—including The Stack Radar—via Bluetooth directly to the app, ensuring accurate, real-time clubhead speed measurements. The system also includes Stack Putting, a gamified, analytics-driven putting practice module endorsed by 5-time PGA Tour winner Ben Crane. The Stack System is ideal for golfers of all levels—from serious amateurs to competitive Tour players—who want a structured, data-informed path to faster swing speeds. It offers adult and junior versions, wholesale options for coaches, and military/first responder discounts, making it accessible to a wide range of users committed to measurable improvement.
Key Features
- Dynamic Variable Inertia Hardware: 5 CNC-milled Stack weights combine with a custom-engineered shaft to produce 30 unique configurations for optimized speed training stimulus.
- AI-Powered Adaptive Training Programs: Training programs developed in the lab and proven on Tour dynamically adjust using AI algorithms as golfers level up their swing speed.
- TheStack App (iOS & Android): Award-winning mobile app featuring guided programs, built-in timers, Bluetooth radar integration, and key speed metrics to track progress over time.
- Stack Putting Module: Gamified putting practice with advanced analytics and actionable feedback, exclusively available inside the app with hardware purchase.
- Compatible Speed Radar Integration: Works seamlessly with The Stack Radar and other compatible speed-tracking devices via Bluetooth for accurate, real-time clubhead speed data.
Use Cases
- Amateur golfers looking to increase driving distance by systematically improving clubhead speed through structured training.
- Junior golfers developing foundational swing speed habits using a purpose-built junior version of the system.
- Golf coaches delivering data-driven speed training programs to multiple students using the wholesale/coaches pricing tier.
- Competitive golfers benchmarking and tracking long-term clubhead speed gains with AI-adaptive programming and real-time radar metrics.
- Golf enthusiasts supplementing on-course practice with guided off-course speed training programs between rounds.
Pros
- Tour-Proven Science: Designed by Dr. Sasho MacKenzie and validated by PGA Tour professionals including Matt Fitzpatrick, giving users confidence in the methodology.
- Adaptive AI Programming: The AI-driven system continuously adjusts training as the golfer improves, ensuring the program stays optimally challenging at every stage.
- All-in-One Ecosystem: Hardware, app, speed tracking, and putting analytics are fully integrated, offering a cohesive training experience without juggling separate tools.
- Available for All Ages: Both adult and junior versions are offered at the same price point, making elite speed training accessible to young golfers as well.
Cons
- Requires Additional Speed Radar: A compatible speed-tracking device must be purchased separately to use the full data-driven features of the system.
- Premium Price Point: At $299 for the hardware, the upfront cost may be a barrier for casual golfers or beginners still exploring the sport.
- Niche Use Case: Focused exclusively on golf speed training, so users seeking a broader fitness or sports performance platform will need additional tools.
Frequently Asked Questions
What is The Stack System?
The Stack System is a golf speed training platform combining precision hardware (CNC-milled weights and a custom shaft), an AI-powered mobile app, and biomechanics programming from Dr. Sasho MacKenzie to help golfers increase clubhead speed.
Do I need a speed radar to use The Stack System?
Yes, a compatible speed-tracking device is required to capture clubhead speed data. The Stack Radar connects via Bluetooth to TheStack App, though other compatible devices are also supported.
Is there a junior version available?
Yes, The Stack System is available in both Adult and Junior versions, both priced at $299.
What platforms is TheStack App available on?
TheStack App is available on both iOS and Android devices.
What is Stack Putting?
Stack Putting is a gamified putting practice module built into TheStack App, offering analytics-driven feedback and performance insights not available elsewhere. It is included with your hardware purchase.
