ByZoom Fitness

BYZOOM FITNESS Classic Series 50 55LB Adjustable Dumbbell Pair Set of 2 5-in-1 OR 15-in-1 Patented Secure System

5.0(7)
$249.99

766+ bought in the past month

About this item

  • 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.
$249.99

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Product details
BrandByZoom Fitness
Color55LB Pair Black
Item Weight110 Pounds
MaterialCast Iron
Special FeatureAdjustable Weight, No-Roll Head, Rust Resistant, Sweat Resistant, Unbreakable

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Customer reviews

5.07 ratings
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★★★★★

Classic Series 55LB Adjustable Dumbbell Set of 2 / 15-in-1 'Quick' Micro-Loading System. Quality !

Jim BMarch 14, 2026

This SOLID Cast Iron Adjustable Dumbbell Set is Very High Quality and Super-Easy/Quick to Adjust/Change the Weights. They are Very Heavy: 55-Pouns Max Weight-each. They are Very Large and the Adjustment Levers really do take just a few seconds to 'change' the Weight. In order to Select/Change the Weight, they MUST be inserted in the Floor Support Cradles/Stands. These Stands are Super Durable and Very Strong [High Quality/Density Plastic]. Included is a Work-Out Log and Easy to Understand 'User' Manual. Actually, this Set is Super-Easy to Adjust and Select the Desired Weight. The Contoured Hand Grips fit Very Well in My Large Hands. Very Easy to Maneuver thru the Workout Cycle. The Weights are Very Heavy @ Full Capacity: 55-pounds each. I have several Sets of 'standard' [different weight] Dumbbells. This Pair of Adjustable Dumbbells Replaces ALL of them [for Me]. I'll keep the smaller Dumbbells for Younger Kids/Family Members ... who can't utilize the heavier/larger weight within this New Byzoom Fitness Set. The 'Range' of Weights You can Select to Use when Working Out are: 10 to 55 Pounds per [each] Dumbbell. Great Weight Choices. And I can't Stress enough How EASY they are to Select and Change the Weight. The Weights are Very Stable Polygon Shapes and Don't Move or Rattle when in Use. Very Secure ... High Quality / Highly Durable Components. It took me a few minutes to get use to the Larger Size of this Set. It is 'Huge' when Lifting the total weight [110-pounds for both]. I use this weight for the 'Farmers Walk' ... and Lighter Weights while Doing other Exercises. I love the fact that you can Improve your Strength with 'Progressive Overload' ... Increasing the Weight [per each exercise] as you Progress over time. Weightlifting is a Sport/Science that enables you to Progressively Increase Weight as your Muscles get Stronger. It takes Time to Improve/Increase Strength & Everyone has Different time/ability/strength Improvement Progressions. This is the PERFECT SET of Dumbbells to use when Charting your Progress over Time. This is by far: The BEST overall Set of Dumbbells I have ever used [50+ years of Weight Training ... Home Gym ... I'm Not a Professional] ... and the Set is Definitely 5+++++ Star Rated Quality / Value ! Read more

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★★★★★

Can’t really ask for more in an adjustable dumbell

American DudeMarch 15, 2026

using them in my garage gym for a few weeks now. Ive gotta say theyre way better than I expected for the price. The polygonal bases are legit stable so no more weights rolling away when I do renegade rows or pushups on the floor like with my old round set. The micro loading setup is the real winner tho. Those extra 2.5LB plates give you so many precise options and its perfect for progressive overload without buying a ton of separate pairs. Saves alot of space in my small setup and the dumbbells actually shorten up at lighter weights which feels way more natural during curls. Build quality holds up great too the cast iron feels dense and that patented lock keeps things completely silent even during explosive lifts. No rattles at all which was my biggest complaint with cheaper adjustables. Only downside is it takes a bit longer to adjust than like power blocks or something because you have to drop in the base but we’re talking like 10-30 seconds so it’s not a big deal - I just do it between working sets - are they as good as fixed dumbells? Absolutely not. But are they just about as good as it gets for an adjustable.. yes. Best value Ive seen for a solid pair like this. 5 stars easy. Read more

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★★★★★

Excellent Adjustable Dumbbells for a Compact Home Gym

Airplane PrincessMarch 9, 2026

I ordered the BYZOOM Fitness adjustable Classic Series 50/55LB dumbbells, and they have been a fantastic addition to our home workout setup. These dumbbells are very well designed and allow you to quickly change weight levels using the adjustment dial on the side. This makes it easy to move between different exercises without needing multiple sets of dumbbells. The weight adjustment system feels smooth and secure. The plates lock in place well, and the handle has a comfortable grip that feels solid in your hand during workouts. Being able to adjust the weight in seconds is incredibly convenient, especially when doing circuits or switching between lighter and heavier lifts. Another thing I really like is how space-saving they are. Instead of having an entire rack of dumbbells, everything is contained in the base units. This makes them perfect for a home gym or smaller workout space. The included trays keep everything organized and make it easy to return the weights after each set. These dumbbells feel sturdy and well built, and they offer a wide range of weight options for different strength levels. Overall, they are a great all-in-one solution for strength training at home and a smart investment for anyone wanting a versatile workout setup without taking up a lot of space. Read more

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★★★★★

Convenient

MissLindzMarch 22, 2026

I've seen adjustable weights before and always thought the idea was neat but never actually went through with buying a set. I seriously wish I did sooner! Going to the gym isn't something I enjoy but I also don't want to have an entire gym setup in my apartment. This is a great happy medium for that since I'm able to tuck it away easily. I really appreciated that it came with a workout guide to help. Switching between weights is pretty easy although I have noticed after a while, the pin for it can get a bit stuck, but overall this is a great set of weights! Read more

★★★★★

An all around winner

Vi MarieMarch 16, 2026

Absolute must have for compact gym set up! It is SO EASY to pick your weight setting- just slide the latch and release! The weights feel very secure on the dumbbell and it doesn’t feel like one could accidentally drop. The handle is a good size and feels good in my grip. The design is intuitive and takes up so much less space than a traditional set up. You can even use the individual weights as free weights for additional training!! Highly recommend if you also dislike public gyms and want a quiet workout at home without committing the extra space. Read more

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