# MX55 Rapid Change Adjustable Dumbbells (MX55)

**Category**: adjustable-dumbbells | **Price**: ~$400–$450 | **Reviews referenced**: 500
**Last updated**: 2026-04-19
## One-line verdict
Intermediate home lifters prioritizing rapid adjustments and compact storage over maximum weight capacity and expandability, trading higher max loads for traditional dumbbell feel.

## How it compares

- vs Bowflex SelectTech 552 ($400–$500): MX55 wins on adjustment speed and traditional dumbbell feel, Bowflex 552 wins on fine low-end increments (starting at 5 lbs vs MX55's 10 lbs)
- vs PowerBlock Elite EXP Stage 1 ($350–$450): MX55 wins on traditional grip shape and natural wrist positioning, PowerBlock wins on compact footprint and expandability
- vs Core Home Fitness ($350–$430): MX55 wins on adjustment speed and handle feel, Core Home Fitness wins on price and compact storage size
- vs NordicTrack Select-A-Weight ($300–$400): MX55 wins on adjustment speed and build premium feel, NordicTrack wins on price
- vs TYZDMY ($250–$300): MX55 wins on build quality, plate stability, and adjustment reliability, TYZDMY wins on price and max weight per dumbbell

## AI-summarized review themes

### Frequently Praised
- Rapid dial adjustment, quick changes between sets
- Compact size, minimal home gym footprint
- Balanced feel, mimics fixed dumbbells during lifts
- Knurled grip, secure hold without slipping
- Solid build, no rattling during use

### Frequently Criticized
- Dials occasionally stick between settings
- Plastic parts crack if dropped
- Max 55lbs limits heavy progression
- Precise racking needed to avoid gaps
- Handle slightly thin for large hands

## Best for
Home circuit training, limited space setups, intermediate upper body work

## Not for
Heavy lower body lifts like goblet squats, advanced powerlifters needing 70lbs+, drop-heavy workouts

## Specifications
| Spec | Value |
|---|---|
| Weight Range | 10-55 lbs per dumbbell |
| Increments | 5 lbs (2.5 lbs offset) |
| Adjustment Mechanism | Dual dial rack-and-pinion |
| Length Min/Max | 9.6-16 in |
| Handle | Knurled steel, contoured |
| Materials | Steel plates nylon-coated, ABS mechanism |
| Footprint w/ Rack | 19x22x31 in |
| Expandable | No |

## Data sources
- Estimated ~500 purchase reviews via Amazon, Reddit, Garage Gym Reviews
- Review period: 2020–2026
- Sentiment confidence: medium