Adjustable Dumbbell (Single) 5-40/80lb, 5lb Increments, for Home Gym Fitness - Upto 20 weight settings
Condition: New
Buy Now, Pay Later
As low as
/ mo
Learn more
- – Up to 36-month term if approved
- – No impact on credit
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
30-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Saturday, Mar 21
Recently Viewed
Color: BLACK - 80LB
Features
- SMART DESIGN: Traditional adjustable dumbbell length remains fixed even with smaller weights. The adjustable dumbbell's length reduces with lower weight selection, providing you a wider range of arm movement. The vibrant colors with matte finish blends anywhere in your home.
- 1-SECOND WEIGHT CHANGE: One hand turn for fast weight adjustment. Enjoy fast adjustment and gain better training efficiency.
- SPECIFICATIONS: The dumbbell plates are made of 95% cast iron, hence are extremely durable.
- THIS PRODUCT IS SOLD AS A SINGLE DUMBBELL. Recommended quantity is to buy in a pair (Quantity = 2).
- WARRANTY & CUSTOMER CARE: Roburflex adjustable dumbbells come with a 2-year warranty which covers all functional damage to the product and replacement of all parts. Please contact roburflex customer support for any warranty claims or concerns (details are in the product manual).
Description
ROBURFLEX Adjustable Dumbbell (Single) 5-40/80lb, 5lb Increments, for Home Gym Fitness - Upto 20 weight settings
Brand: Roburflex
Color: BLACK - 80LB
Item Weight: 80 Pounds
Material: Cast Iron
Special Feature: Adjustable Weight
Brand: Roburflex
Color: BLACK - 80LB
Item Weight: 80 Pounds
Material: Cast Iron
Special Feature: Adjustable Weight
Product Dimensions: 21"L x 7"W
Style: Adjustable Dumbbell
Handle Material: Metal
Number of Pieces: 1
Number of Items: 1
Global Trade Identification Number: 10
Manufacturer: Krato Fitness
Item Package Dimensions L x W x H: 22.5 x 12 x 11 inches
Package Weight: 38.1 Kilograms
Item Dimensions LxWxH: 21 x 7 x 7 inches
Brand Name: Roburflex
Part Number: RF-AD
Size: 21 inches x 7 inches
Date First Available: December 15, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Mar 21
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Color: GREEN - 40LB Extendable
Great quality adjustable dumbbells with a solid 40lb weight range, perfect for home workouts. The matte green finish looks premium and doesn’t scratch easily. Easy to adjust weights, making workouts quick and efficient. Grip feels secure and comfortable even during heavy sets.
Reviewed in the United States on February 2, 2026 by Arsalan
Color: GREEN - 80LB
The ROBURFLEX adjustable dumbbell is a game-changer for my fitness routine! It’s perfect for strength training at home and eliminates the need for multiple dumbbells, saving both space and money. Adjusting the weight is quick and seamless, allowing me to switch between exercises without breaking my flow. The build quality is outstanding—it feels solid and well-balanced in hand, with no rattling parts. The grip is comfortable and non-slip, even during sweaty workouts, which is a big plus. I’ve used it for everything from bicep curls to shoulder presses, and it performs flawlessly. Whether you’re just starting out or are an experienced lifter, this dumbbell is an amazing addition to any home gym. I highly recommend it for its convenience, durability, and overall design!
...
show more
Reviewed in the United States on January 21, 2025 by Alex
Color: GREEN - 40LB Extendable
I just recieved this item today and it's already a 40lb piece of garbage out of the box. I placed the dumbell and cradle on the floor immediately out of the box. My first attempt to pull the dumbbell out of the cradle was successful - it was set to 25 pounds and I pulled out 25 pounds. However. When I tried to return the dumbbell to the cradle, it absolutely would not line up with one side of the remaining weights. I reset all the weights in the cradle by aligning them with the trapezoid shaped guides and then tried again. Once my dumbbell was able to align with thr remaining weight, I tried to size up to 30. However, this time, the weights refuse to leave the cradle and pulling the handle results in ALL the weights and the cradle to go with the dumbell. I have continually attempted to reset the alignment of the weights and the dumbell and continuously the handle gets stuck (can't turn), or weights get stuck, or I can't align the dumbell back in. Furthermore, just to really hughlight whatever the QA process is like for these Dumbells, the indicator on the handle is reversed -> rotating in the + direction decreases the weight and rotating in the - direction increases the weight. There is a lot of promise in these Dumbells, I like the sleek design and the turning mechanism, but if they can't even adjust weights then they're just a waste of money.
...
show more
Reviewed in the United States on July 21, 2024 by Stephanie E
These dumbbells are great. Back in 2019-2020, I finally got the motivation to start going to the gym and putting myself into shape. But unfortunately, all the gyms were temporarily closed due to covid. So, I decided to build my own gym at home. Unfortunately, my space is very limited. And these were perfect for my situation. Saves space, adjustable weight, looks cool. As long as you treated them nicely, not dropping it, being sure each plate was aligned before adjusting it, they work wonders. Although after about a year in, one of the handles broke and stopped adjusting. So, I emailed customer service, and quickly I was able to order a replacement handle. Super easy! I received the part, replaced it, and got back to work. Just recently, the other handle stopped working as well. Same thing, emailed customer service, and ordered a replacement part. Even during holidays and weekends they were able to reply quickly. I’ve been nothing but satisfied with this product and this company. If you're debating whether or not to order this, you should do it. Other companies sell one dumbell for at least $800. For the amount it costs, this is more than perfect.
...
show more
Reviewed in the United States on January 6, 2024 by Jayven
After researching adjustable dumbbells for some time, went with these. Hesitant about a “lesser-known” brand. But I’m impressed. Shipping was excellent…plenty of package protection, and both dumbbells arrived without damage. Been using them regularly for weeks, and no issues. Easy to adjust, comfortable. Had used a friend’s bowflex adjustables in the past. I easily enjoy these much better. As with all adjustables, I’m careful not to drop them, and haven’t yet. That would be my only concern. And trying to save money, I initially opted to not get a stand for them. But after using them for a few weeks, it was too uncomfortable bending down all the time, most notably on heavier sets. Purchased roburflex’s stand. One of the rubber “bumper” on the top of the stand arrived with a stripped bolt hole. I immediately contacted roburflex via email. They responded quickly, and are sending a replacement part, even mentioning they saw I purchased a set of dumbbells, asking if I had any issues with those. I’m admittedly tough to please when it comes to customer service. Often times, whether products or services, I sadly have realized that after purchase, sellers don’t follow-through. But I’m impressed. Impressed enough to leave a review. Which, by the way, was never solicited from Roburflex. Which even that seemed genuine…like they were more concerned with making things right for me. Instead of “we’ll fix this if you give us a nice review.” Solid products, solid service. Thanks, Roburflex.
...
show more
Reviewed in the United States on November 8, 2022 by jonesy
Color: BLACK - 40LB Extendable
For anyone looking to maximize space and versatility without sacrificing quality or performance, the ROBURFLEX Adjustable Dumbbell delivers exceptional value. Its intuitive adjustment, heavy-duty construction, and ergonomic handle ensure it outperforms most competitors in both convenience and user experience, I highly recommend this product
...
show more
Reviewed in the United States on August 3, 2025 by mukthar abdul