Hammer Strength Plate Loaded Ground Base® Jammer
Model code GB-J
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.
Pricing is quoted per project after a free floor plan. Manufacturer warranty and lead time are confirmed in your quotation.
Plate Loaded Ground Base® Jammer specifications
| 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) |
| Storage Weight Horns | 6 |
| Recommended Plate Mix | 4 x 45 lb plates, 4 x 25 lb plates, 4 x 10 lb plates |
Hammer Strength · Plate-LoadedGround Base Combo Incline
145 × 165 × 183 cm (L × W × H)
Hammer Strength · Plate-LoadedGround Base Twist Left
140 × 137 × 138 cm (L × W × H)
Hammer Strength · Plate-LoadedPlate Loaded 4-Way Neck
153 × 91 × 176 cm (L × W × H)
Hammer Strength · Plate-LoadedPlate Loaded Abdominal Oblique Crunch
Hammer Strength Plate-LoadedDescription, specifications and images © Life Fitness, LLC (Hammer Strength). Hammer Strength is a trademark of its owner. Manufacturer's product page.