Best Home Gym Gear
EVO MX100 Dumbbells

MX Select

EVO MX100 Dumbbells

MX Select’s EVO MX100 is a cageless, rapid-change adjustable dumbbell built around the company’s patented rack-and-pinion Positive Lock System: press the release button, dial to the desired weight, and it locks in within a few seconds per side. This catalog listing is the knurled-steel-handle variant (MX100KS), one of two handle options MX Select sells on the same MX100 platform alongside a contoured-rubber-grip version (MX100CR) – the mechanism and dimensions are identical between the two, only the grip differs. Each dumbbell adjusts from 10 to 100 lb in 10 lb steps (10 settings), and MX Select’s optional magnetic increment plates add 5 lb steps up to a 105 lb ceiling. The open, cageless shape lets it sit flush for bench and overhead pressing like a fixed dumbbell, and each side can be offloaded independently for unilateral work. A steel core and internals are paired with a few plastic wear parts (the cradle and a dovetail catch) that owners and reviewers flag as the system’s main durability soft spot, offset by a manufacturer drop/impact warranty. At roughly $800-900 for the pair, reviewers consistently frame it as a strong value against similarly-capable systems like the Nuobell or Rep’s Pepin series.

Model EVO MX100KS (Knurled Steel Handle)
Warranty Manufacturer-stated drop/impact tolerance for manufacturing defects under normal home-gym use (~1 year per third-party review coverage; not itemized on the product page itself)
Mechanism Patented rack-and-pinion dial with Positive Lock System
Offloading Each side adjusts independently, in the plates' 5 lb increments once magnetic adders are installed
Construction Steel dumbbell body and internals; knurled steel handle and selector dials; powder-coated steel weight plates; steel/ABS selector mechanism; polyamide nylon cradle
Manufacturer MX Select
Variant note Also sold with a contoured rubber handle as the MX100CR -- same mechanism and dimensions, different grip
Footprint pair 18.70"L x 16.34"W x 8.07"H
Cageless design Yes -- no surrounding cage/carriage
Handle diameter 1.12" (~29 mm, close to a standard barbell grip)
Known wear points Cradle and a dovetail catch piece are plastic and are the parts owners most often report chipping or breaking
Handle grip length 5.98" (15.2 cm)
Dumbbell length max 16.98" (43.2 cm)
Dumbbell length min 10.58" (24.3 cm)
Weight range per dumbbell 10-100 lb (5.9-45.4 kg), 10 lb increments (10 settings)
Extended range with adders Up to 105 lb (20 settings, 5 lb steps) with optional Magnetic Increment Plates
Accessories sold separately MX Dumbbell Stand (V-shaped), MX Adjustable Bench, Magnetic Increment Plates
Total weight pair with cradles 213.19 lb (96.7 kg)

What is a Adjustable Dumbbell?

What adjustable dumbbells are

Adjustable dumbbells replace a whole rack of fixed dumbbells with one pair whose weight you change via a dial, pin, or selector plate. They are the space-and-money saver for home gyms: a single set can span roughly 5–50+ lb per hand. The trade-offs are bulkier handles, a fixed max weight, and a mechanism that can wear or rattle.

What to look for

Fast adjustment (dial or lever beats stacking plates), a wide and useful weight range, a balanced feel that doesn’t clunk mid-rep, and a durable locking mechanism. Many sets include or offer a stand — worth it, since the blocks are awkward to load off the floor.

How it compares

EVO MX100 Dumbbells QuickDraw™ Adjustable Dumbbells EXP 90 MX EVO MICRO WEIGHT PLATE UPGRADE
GymRadar rating 4.58/5 4.59/5 4.6/5 4.5/5
Price $335.99 $867.00 $79.00
Model EVO MX100KS (Knurled Steel Handle)
Warranty Manufacturer-stated drop/impact tolerance for manufacturing defects under normal home-gym use (~1 year per third-party review coverage; not itemized on the product page itself) 5-year limited warranty, residential use only
Mechanism Patented rack-and-pinion dial with Positive Lock System Lock-N-Load steel switch
Offloading Each side adjusts independently, in the plates' 5 lb increments once magnetic adders are installed
Construction Steel dumbbell body and internals; knurled steel handle and selector dials; powder-coated steel weight plates; steel/ABS selector mechanism; polyamide nylon cradle
Manufacturer MX Select PowerBlock
Variant note Also sold with a contoured rubber handle as the MX100CR -- same mechanism and dimensions, different grip
Footprint pair 18.70"L x 16.34"W x 8.07"H
Cageless design Yes -- no surrounding cage/carriage
Handle diameter 1.12" (~29 mm, close to a standard barbell grip)
Known wear points Cradle and a dovetail catch piece are plastic and are the parts owners most often report chipping or breaking
Handle grip length 5.98" (15.2 cm)
Dumbbell length max 16.98" (43.2 cm)
Dumbbell length min 10.58" (24.3 cm)
Weight range per dumbbell 10-100 lb (5.9-45.4 kg), 10 lb increments (10 settings)
Extended range with adders Up to 105 lb (20 settings, 5 lb steps) with optional Magnetic Increment Plates
Accessories sold separately MX Dumbbell Stand (V-shaped), MX Adjustable Bench, Magnetic Increment Plates
Total weight pair with cradles 213.19 lb (96.7 kg)

4.6/5 · 4 GymRadar reviews

Reviews by source

Expert 4.58/5 4 reviews
Youtube 4.7/5 3 reviews

The EVO MX100 earns consistent praise for squeezing 100 lb per side into a cageless, dial-adjustable dumbbell at a price well below comparable systems from Nuobell or Rep Fitness — GymRadar’s small but positive sample (4.58/5, n=4) and three independent YouTube testers all land on the same verdict: it’s an easy recommend for anyone who’s outgrown a caged or lighter adjustable set. Build quality is mostly steel, with knurled handles reviewers like, but the plastic dovetail catch and cradle are the one durability weak point — a piece owners have reported chipping or breaking if the dumbbells are set down carelessly. Versatility is strong (bench, overhead, curls, and 5 lb per-side offloading), though the fixed 10 lb increments and 100–105 lb ceiling limit it for advanced lifters chasing heavier singles.

  • +Value: at roughly $800-900 for a pair reaching 100 lb/side, GymRadar reviewers and YouTube testers repeatedly call it a better deal than Nuobell or PowerBlock at the same weight ceiling
  • +Functionality: the rack-and-pinion dial locks in a new weight in 5-10 seconds per side, with no wobble once the cradle is seated correctly
  • +Versatility: the cageless design sits flush for bench, overhead, and curl work, and each side offloads independently in 5 lb steps for unilateral training
  • +Build quality: handles and internals are steel with an aggressive, well-liked knurl that multiple reviewers singled out as a highlight
  • +Durability: ships with a drop-tolerance guarantee that reviewers cite as their main peace of mind at this price
  • −Durability: the dovetail catch and cradle are plastic, and are the piece owners report chipping or breaking if the dumbbells are set down at an angle or slammed
  • −Build quality: one long-term reviewer saw the plate paint chip and the weight-selector gears occasionally stick after a month of regular use
  • −Functionality: the standard 10 lb increments are coarse for smaller-muscle or beginner work, and the optional magnetic 5 lb adder plates have been reported to lose their magnets over time
  • −Value: the stand and magnetic adder plates add to the ~$800-900 base price, and durability is a step down from cage-heavy competitors like Rep's Pepin series

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