The Stack System is widely regarded as one of the most effective and scientifically grounded golf speed training systems available today. Designed to help golfers increase clubhead speed, add real driving distance, and do it safely, The Stack System has become a go-to tool for amateurs, competitive players, and PGA Tour professionals alike.

In this The Stack System review, we evaluate whether it truly delivers measurable increases in clubhead speed and driving distance, based on hands-on use and long-term testing, along with performance data tracked across multiple golfers and training cycles. Unlike traditional speed sticks, The Stack System is built around biomechanics, individualized programming, and measurable results — not guesswork.

For golfers serious about increasing clubhead speed, this is one of the most credible solutions on the market.

What Is The Stack System?

The Stack System is a variable-inertia golf speed training system created by Dr. Sasho MacKenzie, one of the most respected biomechanics researchers in golf. Rather than relying on fixed-weight speed sticks, The Stack uses adjustable weight configurations and an AI-powered app to deliver personalized overspeed and overload training protocols.

The system is designed to:
• Increase maximum clubhead speed
• Improve force production and sequencing
• Deliver lasting speed gains that transfer to the course

It is fundamentally different from traditional speed training tools because every workout adapts to the golfer — not the other way around.

What’s Included With The Stack System

A complete Stack System kit includes:
• Precision-engineered training club with a custom shaft
• Interchangeable CNC-milled weights (20g–100g), combinable into 30+ unique load configurations
• Full access to The Stack App (iOS, Android, and web)
• Optional Stack Radar, which provides accurate, real-time clubhead speed feedback

The adjustable weight system enables both overspeed and overload training, allowing golfers to train across a wide force–velocity spectrum — something fixed-weight speed sticks simply cannot do.

How The Stack System Works

The process begins with an initial speed assessment inside The Stack App. Golfers swing the club using different weight configurations while speed data is recorded (especially accurate when paired with the Stack Radar or a compatible launch monitor).

From there, the app generates a personalized training plan, typically:
• 3 sessions per week
• 20–30 minutes per session
• Structured around specific loads, rep schemes, and rest intervals

As training progresses, the system automatically adjusts programming based on performance trends. The app also includes:
• Progress tracking dashboards
• “Grit” and consistency scoring
• Educational content explaining why each protocol works

This data-driven approach keeps training efficient, engaging, and sustainable. One underrated advantage of The Stack App is motivation and adherence: guided workouts, progress tracking, and performance feedback create accountability that most traditional speed sticks lack. Instead of guessing workouts on your own, the app tells you exactly what to do each session — which dramatically improves consistency and long-term results.

Real-World Speed Gains: What We’ve Observed

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Based on our hands-on testing, long-term use, and performance data shared within the Stack community, golfers using The Stack System commonly report measurable speed improvements over structured training cycles.

Typical outcomes include:

• 5–8 mph increases in clubhead speed within 6–8 weeks for many users
• 10–15+ mph gains over longer 10–12 week cycles for highly committed golfers
• Driving distance increases often translating to 15–30+ additional yards

Importantly, these gains are rarely random spikes. The Stack’s progressive, app-guided programming is built to produce repeatable speed increases that hold up under on-course conditions.

Many golfers track their speed gains using launch monitors like the Mevo Gen2 or SkyTrak+, allowing them to verify on-course carry improvements.

PGA Tour players such as Matt Fitzpatrick have publicly credited The Stack System as part of their structured speed development — highlighting its effectiveness at the highest levels of competitive golf.

Beyond raw speed, many users also report:

• Improved rate of force development
• More efficient sequencing and coordination
• Speed gains that persist beyond the training cycle

Unlike generic overspeed sticks, The Stack System’s biomechanics-based protocols are designed to prioritize long-term development while minimizing unnecessary injury risk.

Compatibility With Launch Monitors & Speed Training Setups

One of The Stack System’s biggest strengths is how well it integrates with modern golf technology. Because speed gains are measured primarily through clubhead or ball speed, pairing The Stack with reliable speed tracking makes the program significantly more effective.

While the optional Stack Radar is designed specifically for this purpose, many golfers also use compatible launch monitors, including radar-based systems like the FlightScope Mevo Gen2, the Garmin R10, as well as the ST Max and SC200 Plus. For a full list of compatible launch monitors, check out The Stack System website.

For golfers building a complete practice environment, combining The Stack with a launch monitor allows you to track speed gains during training sessions and then immediately see how those gains translate into ball speed and carry distance during full swings.

If you’re unsure which unit fits your setup, we break down the top options in our Best Launch Monitors Under $5,000 guide, along with more budget-friendly choices in our Best Launch Monitors Under $1,000 article.

Pros and Cons of The Stack System

Pros
• Fully personalized, AI-driven speed training
• Built on peer-reviewed biomechanics research
• Used by elite amateurs and PGA Tour professionals
• Engaging app that promotes consistency
• Measurable, trackable results
• Suitable for beginners through advanced players

Cons
• Higher upfront cost than basic speed sticks
• Requires commitment to the program for best results
• Radar strongly recommended for optimal feedback

How The Stack System “Stacks” Up

From our experience testing speed training systems at Center Face Golf, the biggest difference between The Stack and most competitors isn’t the club — it’s the structure.

Many speed trainers give you a weighted club and leave the rest up to you. You’re responsible for building routines, tracking progress, and staying consistent. For some golfers that works, but for many, it’s easy to get complacent or stop altogether.

The Stack System solves that problem with its app-driven programs. Each session tells you exactly what to do, how many swings to take, and when to progress. There’s no guesswork.

Proper warm-up and stretching before speed training is critical to help prevent injury, which is why the Stack app includes guided warm-up protocols that should always be followed.

Several Center Face Golf testers have used both The Stack and traditional speed trainers, and the feedback has been consistent: The Stack is much easier to stick with. A few testers admitted they eventually gave up on other systems, while The Stack’s guided programs kept them engaged and accountable.

Pricing & Value

The Stack System retails for $299 for the standalone kit and $499 for the bundle that includes the Stack Radar.

While this is more expensive than basic speed sticks, you’re not just buying a weighted club — you’re buying structured, adaptive programming that dramatically increases adherence and long-term results.

For golfers who are serious about adding distance, the added structure is what separates short-term gains from sustainable improvement.

Golfers can save 10% using coupon code TOP10 when purchasing directly from The Stack System.

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Frequently Asked Questions

How much speed can you gain with The Stack System?

Most committed users report 5–8 mph gains within the first 6–8 weeks, with larger improvements possible over longer structured cycles.

Is The Stack System better than traditional speed sticks?

Unlike fixed-weight speed sticks, The Stack uses adjustable loads and app-driven programming to create personalized training plans.

Does The Stack System offer a coupon code?

Yes. Golfers can save 10% by using coupon code TOP10 when purchasing directly from The Stack System website.

Is The Stack System Worth It?

For golfers who are serious about adding distance the right way, The Stack System is absolutely worth it.
It’s not a gimmick or a quick-fix training aid. It’s a complete speed development platform built around data, adaptability, and proven training principles. Golfers who follow the program consistently see real improvements — not just faster swings, but better overall athletic efficiency.

If your driver distance has plateaued, or if you want a structured, safe way to swing faster, The Stack System stands out as one of the most effective tools available.