Bowflex SelectTech 552 vs NÜOBELL 580

Bowflex SelectTech 552 versus NÜOBELL 580 is a spec comparison, not a test. Dial 52.5 versus twist-lock 80. 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.

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.

NÜOBELL describes the NÜOBELL 580 as: Twist-handle pair covering 5–80 lb per hand in 5 lb steps, 485 × 193 × 185 mm per unit, with a 2-year warranty extendable to 4 years when bought from NÜO Athletics. NÜO Athletics publishes the 580 range as 5–10–15–20–25–30–35–40–45–50–55–60–65–70–75–80 lb, with shown handle numbers allowed to differ up to ±5%. Net weight is 80 lb per dumbbell; product dimensions are L 485 × H 185 × W 193 mm with a 105 mm × 32 mm aluminum handle. Warranty is 2 years, plus a 2-year extension when purchased directly from NÜO Athletics.

On listed height, Bowflex SelectTech 552 is 9 in and NÜOBELL 580 is 7.28 in. Width is 8.3 in versus 7.6 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 54.6 lb versus 80 lb. Listed load or user capacity is not published lb versus not published lb.

Published range is 5–52.5 lb versus 5–80 lb. Increment is 2.5 lb versus 5 lb. Mechanism is dial versus twist-handle. Listed length is 16.9 in versus 19.09 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 “Parts 2 Years” versus “2-year warranty, plus 2-year extension when bought directly from NÜO Athletics”.

FitScout spec scores — our weighted rubric, not Amazon stars — are 56 for Bowflex SelectTech 552 and 65 for NÜOBELL 580. 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 Bowflex SelectTech 552 is for, in our reading of the spec sheet: 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.

Who the NÜOBELL 580 is for: Lifters who want a published 5–80 lb twist-handle pair that replaces 16 traditional dumbbell pairs. Skip it when needs increments finer than 5 lb or a starting weight below 5 lb.

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.

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