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MX30 Rapid Change Adjustable Dumbbells vs NordicTrack Select-A-Weight Dumbbells

Buy the MX30 pair if you want two dumbbells with fine 2.5 lb steps and a 7.5 lb starting weight for micro-load work. Buy the NordicTrack 55 lb Select-A-Weight if you need heavier single-dumbbell work up to 55 lb and knurled handles. The NordicTrack is $179.00 at Best Buy as of November 7, 2026, down from $319.99 on November 3. No current price was given for the MX30, so compare its live price before deciding.

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MX30
MX30 Rapid Change Adjustable Dumbbells

MX30 Rapid Change Adjustable Dumbbells

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Choose the MX30 if you want a matched pair with 19 settings, 2.5 lb increments and a light 7.5 lb start for small progressions.

Pros
  • Two dumbbells in one set, so you can train both arms at once
  • Fine 2.5 lb jumps suit micro-loading and beginners
  • Light 7.5 lb starting weight
  • Metal gear selection system with a secure cradle
Cons
  • Tops out at 30 lb per dumbbell
  • Plastic and nylon components on plates
  • No current price given to judge value
NordicTrack
NordicTrack Select-A-Weight Adjustable Dumbbells

NordicTrack Select-A-Weight Dumbbells

NordicTrack Select-A-Weight Adjustable Dumbbells

$179.00at Best BuyObserved Nov 7, 2026, 3:52 PM
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Choose the NordicTrack Select-A-Weight if you want one dumbbell that goes to 55 lb with knurled steel handles and a storage tray.

Pros
  • Reaches 55 lb, enough for heavier pressing and rows
  • Knurled handle gives a firmer grip
  • Storage tray included
  • $179.00 at Best Buy as of November 7, 2026, well below its $319.99 high on November 3
Cons
  • Sold as a single dumbbell, so a pair costs double
  • 5 lb plate steps are coarse for small progressions
  • Plastic-coated plates and plastic tray feel less durable

What separates them

MX30 Rapid Change Adjustable DumbbellsNordicTrack Select-A-Weight Dumbbells
Number of dumbbellsPair includedSingle dumbbell (package quantity 1)
Weight range7.5 lb to 30 lb per dumbbell, 80 lb totalUp to 55 lb
Weight increments2.5 lb steps, 19 settings5 lb plates
GripContoured antimicrobial grips, 36 mmModerate knurling on steel handle
Adjustment systemPatented rack and pinion dial with 100% metal gearsSelect-A-Weight dial, quick switch between sets
StorageHandset cradle and cradle feet includedHigh-impact plastic storage tray included
BuildMetal gears, nylon-coated plates, powder-coated rackPlastic-coated plates, plastic tray, steel handle
PriceNot provided$179.00 at Best Buy as of November 7, 2026

Price history

$319.99$179.00
Nov 2Nov 7
  • MX30 Rapid Change Adjustable Dumbbells: lowest $199.00 on Nov 2 at mxfitnesssupply.com.
  • NordicTrack Select-A-Weight Dumbbells: lowest $179.00 on Nov 7 at Best Buy.

Prices at every store

MX30 Rapid Change Adjustable Dumbbells

  • mxfitnesssupply.comCheck price at mxfitnesssupply.com
Prices and history →

NordicTrack Select-A-Weight Dumbbells

  • Best BuyNew

    In stock

    $179.00Free shippingObserved Nov 7, 2026, 3:52 PM
    Visit Best Buy
  • Lowe'sNew

    Out of stock

    $299.41Free shippingObserved Nov 7, 2026, 3:52 PM
    Visit Lowe's

Also available at

  • Abt Electronics & AppliancesCheck price at Abt Electronics & Appliances
  • AmazonCheck price at Amazon
  • BrandsMart USACheck price at BrandsMart USA
All 2 stores and price history →

Specs compared

SpecMX30 Rapid Change Adjustable DumbbellsNordicTrack Select-A-Weight Dumbbells
MaterialPlastic, MetalPlastic (tray)
Individual Weight8.75 lbs (offset)55 lb
Total Weight80 lb55 lb
TypeDumbbellDumbbell
Plate Weight1.25 lbs5 lb
Included AccessoriesMX patented handset cradle, MX handset cradle f…Storage tray
Build TypeDumbbellsDumbbells
Build FinishPowder coated (weight rack and cradle)Knurling finish (handle)
Grip Diameter1.4 in (36mm)Fixed
Length9.5 in (dumbbell at 7.5lbs)Shorter at lighter weights
Height6 in (plate)9 inches
CoatingPowder coated (weight rack and cradle), Polyani…Plastic-coated
Show all 35 specsShow fewer specs
SpecMX30 Rapid Change Adjustable DumbbellsNordicTrack Select-A-Weight Dumbbells
Grip TypeAntimicrobial contoured gripsKnurled, Moderate knurling
ColorBlackBlack
Design HighlightsRapid Change AdjustableiFIT Capable
Weight Increments2.5 lbs—
Width6.5 in (plate)—
ErgonomicsContoured grips—
Diameter—8.5 inches (weight plates)
Shape—Rounded design (plate)
Impact Resistance—Storage tray is made of high-impact plastic

Questions and answers

Which is better for beginners?
The MX30. Its 7.5 lb start and 2.5 lb steps let you add weight slowly. The NordicTrack jumps in 5 lb steps and starts heavier.
Which goes heavier?
The NordicTrack, at 55 lb per dumbbell. The MX30 stops at 30 lb per dumbbell.
Do I get two dumbbells with each?
Only with the MX30, which ships as a pair. The NordicTrack listing is one dumbbell, so buy two for a pair.
Is the NordicTrack worth $179.00?
Yes if you need 55 lb per hand. That price at Best Buy as of November 7, 2026 is $140.99 below its $319.99 price on November 3.
Which has the better grip?
The NordicTrack's moderate knurling grips better under heavy load. The MX30 uses contoured antimicrobial grips that are easier on the hands.
Which lasts longer?
The MX30's metal gears and nylon-coated plates should hold up better. The NordicTrack uses plastic-coated plates and a plastic tray.

More comparisons

  • MX30 Rapid Change Adjustable Dumbbells vs NordicTrack Select-A-Weight Dumbbells
  • PowerBlock Elite EXP Adjustable Dumbbells vs NordicTrack Select-A-Weight Adjustable Dumbbells
Size
—
Compact
Skill Level—Beginner
Package Contents—Dumbbell
Package Quantity—1
Rack Material—Plastic
Grade—Residential
Series Name—55lb Select-A-Weight Dumbbell
Total Weight (lbs.)—55
Maximum Weight (lbs.)—55
Minimum Weight (lbs.)—10
Number of Weights—15
CA Residents: Prop 65 Warning(s)—true
Warranty—90-day limited
Collection/Series Name—55lb Select-A-Weight Dumbbell