Ativafit Martian 50 Lb Adjustable Dumbbell Set vs Bowflex SelectTech 552

Ativafit Martian 50 Lb Adjustable Dumbbell Set versus Bowflex SelectTech 552 is a spec comparison, not a test. 50 lb-class pairs at different list bands. Every number below is copied from a manufacturer page or official sheet and carries an as-of date of 2026-10-14 on the product records. If a field is blank on the maker’s page, it stays blank here.

Ativafit describes the Ativafit Martian 50 Lb Adjustable Dumbbell Set as: Dial-adjust pair published at 5–50 lb in 5 lb increments, 16.5 × 7.1 × 7.9 in, with a 2-year warranty. Ativafit publishes a 5–50 lb range, 5 lb increments, and dimensions of 16.5 in L × 7.1 in W × 7.9 in H for the Martian set. Adjustment is Dial Tech; materials are steel plates with a reinforced base and steel-core non-slip rubber grip. The compare page lists a 2-year warranty for the adjustable-dumbbell line.

Bowflex describes the Bowflex SelectTech 552 as: Dial-adjustable pair covering 5–52.5 lb per hand across 15 published settings in a 16.9 × 8.3 × 9 in footprint, with a 2-year parts warranty. Bowflex publishes 15 settings per dumbbell from 5 to 52.5 lb: 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 30, 35, 40, 45, 50, and 52.5 lb. Each unit is listed at 16.9 in L × 8.3 in W × 9 in H with quick-adjustment selection dials and a 2-year parts warranty. The pair is sold with storage trays; a stand is sold separately.

On listed height, Ativafit Martian 50 Lb Adjustable Dumbbell Set is 7.9 in and Bowflex SelectTech 552 is 9 in. Width is 7.1 in versus 8.3 in. Depth / length is not published in versus not published in (falling back to a listed length where a maker omits depth). Unit weight is not published lb versus 54.6 lb. Listed load or user capacity is not published lb versus not published lb.

Published range is 5–50 lb versus 5–52.5 lb. Increment is 5 lb versus 2.5 lb. Mechanism is dial versus dial. Listed length is 16.5 in versus 16.9 in. A 2.5 lb step at the bottom of a dial pair is not the same as a uniform 5 lb twist handle. Warranty text is “2-year warranty” versus “Parts 2 Years”.

FitScout spec scores — our weighted rubric, not Amazon stars — are 48 for Ativafit Martian 50 Lb Adjustable Dumbbell Set and 56 for Bowflex SelectTech 552. Missing fields do not count as zeros; they drop out of the average. The rubric for adjustable dumbbells is published on the methodology page.

We do not print manufacturer list prices or Amazon prices on this page. Use Check price on each card for the current offer.

Who the Ativafit Martian 50 Lb Adjustable Dumbbell Set is for, in our reading of the spec sheet: Lifters who want Ativafit's published 5–50 lb Dial Tech pair with steel plates and matching trays. Skip it when needs more than 50 lb per hand; Ativafit lists Lava 66 and Flare 88 for higher ranges.

Who the Bowflex SelectTech 552 is for: Lifters who want a manufacturer-published 5–52.5 lb dial pair that replaces 15 fixed weights in one compact tray-based set. Skip it when needs more than 52.5 lb per hand or a single uniform increment across the full range.

If ceiling height is the constraint, prefer the shorter published frame and then run Will-It-Fit with your ceiling, your height, and the exercise. HAJEX’s standing-press rule of thumb is height × 1.33 plus about 9 in for full-size plates. A rack that “fits the room” on assembled height can still fail a pull-up if there is not about a foot above the bar.

This page does not say either product was used, assembled, or worn-in by FitScout. Sources are the manufacturer URLs on each spec row. If a maker updates a dimension after 2026-10-14, the as-of date is the tell.

647 words. Spec-based analysis, not a test report.