PRx Slam Balls
No Bounce Design
Absorbs the slam
Rubber Casing
Built for abuse
Shifting Fill
Works grip and stabilizers
10 to 35 lb
Five weight options
A slam ball's whole job is to take a beating and stay dead on the floor, and that is exactly what these do. The rubber casing absorbs every slam with no bounce back, while the shifting internal fill works your grip and stabilizers through twists, carries, squats, and weighted holds.
Weight:35 lb
Genuine PRx Performance
Synergy Custom Fitness is a PRx Performance retail partner. Every PRx free weight on our site is the same gear PRx sells directly, fulfilled and shipped to your door by PRx itself.
Dead on Arrival
No bounce means the ball hits the floor and stays there. Slam at full intent without playing dodgeball with the rebound. Full power, zero bounce, every rep.
A Casing Built for Abuse
The rubber shell is designed to absorb repeated max effort slams into concrete, session after session, without splitting or deforming. That is its entire job description.
The Shifting Load
The fill moves as the ball moves, forcing hands and core to keep adjusting. Russian twists, goblet squats, and carries all get harder in a useful way.
More Than Slams
Balance on it for push ups, pinch it between your feet for pull ups, hug it for lunges. One ball covers a surprising spread of conditioning work.
Genuine PRx, Shipped Direct
Synergy is a PRx Performance retail partner. Your order is fulfilled and shipped to your door by PRx itself, the exact same gear PRx sells on its own site.
Two Sizes, Five Weights
The 10 through 20 lb balls run 9 inches across, the 30 and 35 lb balls run 10 inches, so heavier never means unwieldy in your hands.
| Weights | 10, 15, 20, 30, 35 lb |
| Diameter | 9 inches (10-20 lb), 10 inches (30-35 lb) |
| Material | Rubber casing |
| Bounce | None by design |
Good to Know
| Sold As | Single slam balls |
| Ships From | PRx Performance, direct |
| Best For | Slams, carries, twists, conditioning work |
- Free weights arrive ready to use. No assembly required.
- Looking for rack assembly instructions? Visit our File Library ›
Frequently Asked Questions
For learning slam mechanics, 10 to 15 lb keeps the movement fast and honest. Conditioned athletes typically work between 20 and 30 lb. Heavier is not better if the slam slows to a lower.
Slam balls are dead weight built to hit the floor. Medicine balls are for throws, wall work, and partner drills where some rebound and a larger diameter help.
Yes. Synergy Custom Fitness is a PRx Performance retail partner. Every PRx item on our site is the same product PRx sells directly, fulfilled and shipped by PRx itself.
PRx free weights ship separately and arrive directly from PRx Performance. They are not part of Synergy's free shipping promotion, which applies to orders over $699 of Synergy racks and accessories. If your order mixes racks and free weights, expect separate deliveries.
Our standard 30 day return policy applies. Email support@synergycustomfitness.com with your order number to get a Return Merchandise Authorization within 30 days of delivery, and keep items in their original new condition and packaging.