BYZOOM FITNESS Classic Series 50/55LB Adjustable Dumbbell Pair Set of 2 OR Single Unit (Check qty before purchase), 5-in-1 OR 15-in-1 Patented Secure System, Solid Cast Iron Core, Iconic 12-Sided Polygonal Anti-Roll Base, Professional Heavy Weight for Men and Women, Black

Price: $159.99
(as of Apr 09, 2026 07:45:23 UTC – Details)


DOMINATE YOUR HYPERTROPHY. NO COMPROMISE. The BYZOOM FITNESS Classic Series 55LB is engineered for the man who understands that small gains lead to massive results. By integrating two removable 2.5LB micro-plates into our industrial-grade cast iron frame, we’ve created a 15-in-1 tool that offers more precision than any other adjustable in its class. ENGINEERED FOR CHAMPIONS Tested and trusted by WNBF 3x World Champion Zack, this gear is built for the grind. While other brands use bulky composite fillers, we utilize nylon-coated cast iron for a shorter, tougher, and better-balanced dumbbell that survives years of heavy drops. PRECISION AT SPEED The 1-second weight change system allows you to jump between main weight levels instantly, while the micro-loading dials let you fine-tune your resistance. It is the ultimate space-saver, replacing a 15-piece commercial rack with one mission-focused unit. TECHNICAL SPECIFICATIONS: Material: High-Density Nylon-Shielded Cast Iron Weight Range: 10 LB to 55 LB (15 Levels) Form Factor: 12-Sided Polygonal Anti-Roll Base Micro-Adjust: Dual 2.5 LB Removable Plates Safety: Patented US/EU/Asia Dovetail System
ULTIMATE 15-IN-1 PRECISION: The 55LB Classic Series features dual 2.5LB removable micro-plates, giving you 15 precise weight increments to master progressive overload and break through strength plateaus. Buy One Set, Use Longer. Best Value for Home or Garage Gym.
FORGED CAST IRON DURABILITY: We use high-density, nylon-shielded cast iron to deliver a compact, balanced feel and a solid impact that won’t rattle or crack during high-intensity sessions.
STABLE 12-SIDED POLYGONAL BASE: Our classic polygonal plates provide a rock-solid, stationary foundation. Use the weights as a stable platform for renegade rows and floor push-ups without the instability or rolling risk of round dumbbells.
ADJUSTABLE LENGTH: Most adjustables stay bulky even at light weights. Our high-density iron allows the dumbbell to physically shorten from 15.94″ to 6.65″ as you drop weight, ensuring a natural range of motion that won’t bump your body.
PATENTED DUAL-LOCK SECURITY: Train with the confidence of a 3x World Champion. Our patented safety dovetail mechanism secures the main plates, while the secondary rotation lock keeps micro-plates tight for a silent, rattle-free experience during explosive lifts.