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Powerblock U-90 Stage 1 Dumbbell Set (5-50 Lbs.)

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  • Powerblock U-90 Stage 1 Dumbbell Set
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  • Column Stand Not included

Powerblock U-90 Stage 1 Dumbbell Set (5-50 Lbs.)



Powerblock U-90 Stage 1 Dumbbell Set has a weight range from 5-50 lbs. This set replaces 16 pairs of dumbbells or 825 lbs of free weights.


  • Expandable to 70 lbs, again to 90 lbs, and further to 125 lbs per hand
  • Increments - 2.5, 5, 7.5, 10,15, 17.5, 20 25, 27.5, 30, 35, 37.5, 40, 45, 47.5, 50 lbs per hand
  • Dimensions - 12.5" L x 7" W x 7.25" H
  • Lifetime home use warranty

Ships in 2 boxes.

Optional U-125 Stand for additional cost. This stand will work with any PowerBlock Set up to 130 lbs per hand, excluding XXXL Sets


Expansion kits are optional.


 Product Videos

PowerBlock U-90
  • PowerBlock U-90

 Specifications & Warranty

Lifetime Home Use Warranty

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 Product Reviews

  1. Great choice for a home gym 4 Star Review

    Posted by on 13th Oct 2015

    I have owned my Powerblock U-90s for about 2 weeks and have logged 10 workouts with them. In summary, they are a great alternative to a rack of free weights whose drawbacks are far outweighed by their benefits.

    Here's what I like:
    - Price. If you're like me and have workouts that run the rack, these are cheaper than most good 5-50lb DB rack sets. Once you consider the cost of expanding the set to 90lbs, the price becomes even more attractive.
    - Form factor. These stow away neatly in a corner behind my bench. Side by side, their combined footprint is about 1 foot by 16 inches, and their square shape helps them to blend into the background.
    - Adjustability. Changing weights is so easy it's ridiculous. 5 seconds, 10 if you're adjusting in 2.5 or 5lb increments. I was concerned about the switch from metal pin selectors to plastic fork selectors in the U series, but the forks are sturdy and feature strong magnets in the handles. Switching is smoother and easier than in any other adjustable set I have encountered (Bowflex SelectTech, Olympic dumbbells, Ironmaster). The urethane coating makes the sliding action of the plates smooth without adding bulk to the unit.
    - Urethane coating. My floors are safe. Very nice coating on this set.
    - Handle. It's slightly convex and very grippy. Probably the highest quality grip I have encountered on a dumbbell. Very comfortable in my large hands.
    - Build quality. Very solid build quality, especially compared to other adjustable dumbbell.

    Not everything is perfect. Here are some things I don't love:
    - Balance. Unlike traditional Dumbbells and adjustable sets, the Powerblocks' center of balance is not right on the handle, but rather in front of the handle. The Powerblocks feature 2 2.5lb slugs in each dumbbell that load into cylinders at the front of the unit. The weights feature padded wrist stabilizers to prevent you from going out of alignment due to the imbalance, but the imbalance is noticeable, especially when lifting lower weights with the slugs loaded, and doing non-press exercises (flies and raises). I did not notice the imbalance lifting heavier weights and pressing.
    - Slugs. The 2 2.5lb slugs in each weight have their own locking mechanism inside the white core piece. Besides changing the balance of the weight, it's a pain to have to remove the core unit, eject the slugs (not onto your wood floor--they're solid metal) and re-insert the core unit to adjust in 2.5 or 5lb increments. I am sure the slug design helps make the unit more compact, but if that's the case I wished they could have used a denser material and put the slugs in the handle to preserve balance.
    - Square edges. Every now and then I snag myself or my clothes with the corners of the Powerblocks. This is especially the case with movements that are really close to the body: upright rows, rear delt rows, etc.)
    - Goofy looking. But that's splitting hairs. Who cares how they look?

    I'm very happy with the purchase and would recommend them to anyone looking for a home dumbbell set.

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