Search  for anything...
REP

Rep Fitness Adjustable Kettlebell | Weight Set for Home Gym | Strength Training Equipment for Men & Women | Compact Steel Bell with Ergonomic Handle | Choose 16 kg, 24 kg or 40 lb Models

Based on 153 reviews
Condition: New
Checking for the best price...
$159.99
Save $19.61 was $179.60

Buy Now, Pay Later


As low as $26.67 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – 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, Zip, Apple Pay, and Google Pay. 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 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.
Fulfilled by Rep Fitness

Arrives Oct 29 – Oct 31
Order within 19 hours and 20 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

At a glance

Condition
New
Color
Red | 40 Lb
Model
KB-4100-40
Weight
40 lb
Material
Iron
Handle Diameter
1.3 in

Features 5

  • SELECT YOUR WEIGH FAST: The Rep Fitness Kettlebell adjusts more quickly than any other on the market. Simply push down and twist to select the resistance that you need for your workout. Each kettlebell has 5 different weight settings to replace 5 different kettlebells.
  • Strength Training Equipment For All Levels: From beginners to advanced lifters, this adjustable kettlebell supports key movements like swings, squats, and pressesideal for building total-body strength and endurance.
  • BUILD STRENGTH, POWER, AND ENDURANCE: Achieve your fitness goals faster with Rep Fitness Ketllebells. Quickly improve metabolic conditioning and increase your overall lean muscle mass. Use them for swings, deadlifts, squats, get-ups, snatches and other Cross Training workouts.
  • DESIGNED FOR PERFORMANCE: Matte powdercoated surface isn't slippery like competitors' glossy surfaces. Internal nylon thermoplastic weight retainers are extremely rugged and each internal weight plate is secured by its own set of fasteners. Plus, the rubber bottom is easy on your gym floor.

Description

Features Simply push down and twist to add or remove weight. Each weight is secure with its own internal nylon thermoplastic fastener so not rattling or shifting Each Adjustable Kettlebell includes five different weight settings. Matte powder coated surface provides you with a secure grip. Adjustable Kettlebells have a rubber bottom to protect your floors. 20-40 LB Adjustable 8-16 KG Adjustable 16-24 KG Adjustable KG Kettlebell LB Kettlebell REP is a fitness equipment company based in Colorado with showrooms in Pennsylvania and California! Not only do we make great gear, but we use it too! We never cut corners on quality and never will. Our gear is designed for modern training regimens and will stand by you on your hardest days. Getting a PR is hard, but getting gear shouldn't be. We carry a full line of fitness gear from adjustable benches to Kettlebells and Power Racks Our mission is to provide high value fitness equipment with Trust, Expertise & Innovation. Bring the gym home with REP Based in Colorado, REP Fitness was founded by two gym-loving brothers in 2012. From adjustable benches to plyoboxes and dumbbell sets, we offer a full line of gym gear designed by in-house, weightlifting engineers for both commercial and home gyms. Our gear is designed for modern training and will stand by you on your hardest day. Here at REP we believe that getting a PR is hard, but getting great gear shouldn't be. Brothers Ryan and Shane Mcgrotty started REP in Longmont, Colorado, in a 1,200-square-foot retail storefront with a two-car garage. They filled it with a few pieces of equipment and stacked bumper plates to the ceiling in the closet. Their shop wasn’t a big, flashy space, but even in the humble garage, the brothers’ goal was to see people's eyes light up when they walked into the space. They wanted to bring back the art of customer experience. They also wanted to sell high-quality gear they would (and did) buy, use, and love themselves. Our respect for those who provide our freedom and security is what drove our desire to give back. In 2023, we chose to pledge $100,000 to three great charities that help military and first responder's families. In this way we can ensure the money we give goes to those with the greatest need, and continues our tradition of honoring those who serve our nation and our community. The three charities that we donated to (and encourage you to check out) are: - The First Responders Children's Foundation - Folds of Honor - Gary Sinise Foundation

Specs 14

Item Weight 40 pounds
Brand REP
Color Red | 40 Lb
Material Iron
Special Feature Adjustable, Ergonomic, Rust Resistant, Wide Handle
Brand Name REP
Manufacturer Rep Fitness
Number of Items 1

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 29 – Oct 31

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


Adjustable kettlebell that’s easy to use
Color: Red | 40 Lb
I have adjustable dumbbells so adjustable kettlebell was a no brainer. Always been a fan of REP fitness because they make good innovative products. Buying on Amazon is about the same give or take a dollar if you buy off their website. The kettlebell works as intended and seems solid, the weights inside clunk a little, but I haven’t thrown them across the room doing kettlebell swings yet so that’s good. I don’t drop mine, but the plastic core that holds the weights is robust. You always have that lingering thought in the back of your mind if it ever gave out. Overall, I like the product and it saves space. ... show more
Reviewed in the United States on October 22, 2025 by Dennis

Best adjustable kettlebell you could buy.
Color: Red | 40 Lb
Love this kettlebell. If you are hesitant we’ll don’t be. It’s great quality. And it helps cut down on multiple bells. It’s shaped as good as you can get to a non adjustable kettlebell. Rep Fitness did an outstanding job with this.
Reviewed in the United States on July 6, 2026 by Dustin

Nice bit of equipment
Color: Red | 40 Lb
so far works well and seems to be well built.
Reviewed in the United States on September 11, 2026 by Darran J.

Great quality!
Color: Red | 40 Lb
Absolutely love! Great quality and space saver for home gym. I highly recommend!
Reviewed in the United States on October 19, 2026 by Victoria Byron

Kettlebell feels like a normal one with all the features of an adjustable.
Color: Red | 40 Lb
So many good things to say about this Kettlebell, but I just couldn't give it 5 stars. Let's start with all the good. Love the shape, and feel (for the most part). The shape is very much like a standard kettlebell, so all of your standard exercises feel "right". I was looking for an adjustable that gave me the same experience and this one pretty much does it. Plus, it was a brand I knew rather than a no-name. The handle feels good, the right size for one or two hands with a comfortable non slip texture. Easy to adjust weights and enough increments that it is useful for my office without taking up much space. OK, now for the reason I took away one star. I've been using this for a couple weeks now and I found that the mechanism to hold the weights in place isn't perfect. While doing swings with it I noticed that the inner weights slipped out and jammed. To fix this I had to turn the dial down to the lowest setting and knock the kettlebell on the ground to free up the inner weights. Problem solved. I also mentioned above that I like the feel, for the most part. Inner weights rattle around a bit. I guess this is to be expected, but I'd like a little tighter lock on them, if possible. Really shouldn't even mention that tbh, but I notice it. All told, this really does what I wanted it to and I'm happy. ... show more
Reviewed in the United States on February 27, 2025 by Lomonster

Rep fitness adjustable kettle bell
Color: Red | 40 Lb
Been using it for a couple weeks. Easy to adjust. Feels sturdy and solid. Swings through the legs just fine. The grip is good for me one or two handed.. Yes, it’s probably more money than you want to spend but the ability to save space by having just one bell to me is worth it.
Reviewed in the United States on September 17, 2026 by Dougie

Great system
Color: Red | 40 Lb
Great ease of use and well made.
Reviewed in the United States on September 15, 2026 by Philip Curran

Value for money
Color: Red | 40 Lb
These are absolutely amazing. Extremely easy to adjust mid workout without hassle. Great value for money.
Reviewed in the United States on July 3, 2026 by Nikhil
Checking for best price...