Ground Base® Jammer
Built for raw power and explosive performance, the Hammer Strength Ground Base® Jammer is the real deal—no imitations, no compromises. While racks try (and fail) to mimic its movement, only the Jammer delivers the perfect blend of converging and diverging motion, unlocking true athletic drive.
Designed in the ‘90s and still unmatched today, it’s the gold standard for developing force, power, and on-field dominance. When it comes to training like an athlete, there’s no substitute—there’s only the Jammer.
Dimensions (L x W x H): 66 in x 79 in x 83 in (167 cm x 202 cm x 212 cm)
Weight: 370 lb (168 kg)
Built for Explosive Power
Athletes don’t just lift—they drive, push, and explode. The Ground Base® Jammer trains force production in the most athletic way possible, mimicking the powerful pressing movements seen in sport. Whether it's linemen battling in the trenches or sprinters driving out of the blocks, the Jammer builds the kind of strength that translates to real performance.
Unmatched Since the ‘90s
The Ground Base® Jammer isn’t new—it’s legendary. While other companies try to replicate its movement with half-measures, only Hammer Strength delivers the true Jammer experience. Designed in the mid-90s and still dominating weight rooms today, it remains the ultimate training tool for explosive strength.
Customize your own Jammer
Customize your equipment like never before with our 3D configurator tool, featuring augmented reality to visualize and drop your design directly into your space.
Specs
| Dimensions (L x W x H) | 66 in x 79 in x 83 in (167 cm x 202 cm x 212 cm) |
|---|---|
| Weight | 370 lb (168 kg) |
| Max Load Capacity (per arm) | 4 x 45 lb plates (4 x 20 kg plates) |
| Starting Resistance (per arm) | 8 lbs (3.6 kg) |
|---|---|
| Product Code | GB-J |
| Storage Weight Horns | 6 |
| Recommended Plate Mix | 4 x 45 lb plates, 4 x 25 lb plates, 4 x 10 lb plates |
FAQ
Additional Ground Base Products
Accessories on this Product
Riley Moss Our Athlete
- NFL Cornerback
- 2-Time All BIG10 Football Player
- All-American
Plate Loaded Resources & Guides
Hammer Strength Plate Loaded
There is a lot to think about when choosing commercial gym equipment, but one thing is never in doubt. Plate loaded machines are a must-have in strength training spaces. Learn more +Is Hammer Strength Plate Loaded Equipment Your Gym's Secret Weapon?
Discover how Hammer Strength Plate Loaded Equipment sets the new standard in strength training with premium materials, rigorous testing, and natural biomechanics Learn more +Hammer Strength Pendulum-X Infographic
View our infographic to learn how the Pendulum-X Squat is different from traditional pendulum squat machines Learn More +Hammer Strength Plate Loaded Ground Base Multi-Squat
Ground-based training is crucial for athletes because it allows them to perform movements that closely resemble those they encounter in their sports. Learn more +Hammer Strength Plate Loaded Super Fly
Unlike pec fly machines or free weights, our Super Fly elevates upper-body training with advanced design, flat-to-decline adjustability, and a smooth movement pattern. Learn more +SCHEDULE A CONSULTATION WITH A LIFE FITNESS REPRESENTATIVE.
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