Customized variable inertia speed training - the most efficient way to increase your bat speed. The algorithms that power the dynamic programming come from years of research by leading sports scientist, Dr. Sasho MacKenzie.
Your Own Personal Speed Trainer
Be guided you through scheduled workouts while tracking Stack weight, rest, recovery, and performance gains. This information allows future workouts to be adjusted behind the scenes, so your training is optimized to maximize bat speed gains.
Tracking & Sharing Metrics
Track key performance metrics such as Stack Speed, Distance Potential, Bat Speed and Grit Score. Easily share your progress and gains.
Dynamic Training Programs
A.I. powered algorithms enable optimal training regardless of where you are on your baseball journey.
The Stack Baseball Hardware
Dual-Purpose Weight Case
Thread Fastener
5 CNC Milled Stack Weights
Tapered Handle with Stack Grip
Dual-Purpose Weight Case
Thread Fastener
5 CNC Milled Stack Weights
Tapered Handle with Stack Grip
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Now Shipping Pro & Youth Stack Bats and Speed Tracking Radar!
