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Hybrid Stone Molds

10" dia. 35LB Hybrid Stone Mold
10.75" dia. 50LB Hybrid Stone Mold
12" dia. 65LB Hybrid Stone Mold
13" dia. 95LB Hybrid Stone Mold
14" dia. 115LB Hybrid Stone Mold
14.5" dia. 130LB Hybrid Stone Mold
15" dia. 145LB Hybrid Stone Mold
15.5" dia. 160LB Hybrid Stone Mold
16" dia. 173LB Hybrid Stone Mold
17" dia. 215LB Hybrid Stone Mold
18" dia. 250LB Hybrid Stone Mold
18.5" dia. 275LB Hybrid Stone Mold
19" dia. 300LB Hybrid Stone Mold
Women's Hybrid Mold Set
One Each: 10-12-13 + Free Shipping
Men's Hybrid Mold Set
One Each: 13-14-15 + Free Shipping
Mammoth Hybrid Mold Set
One of Each Mold: 10-12-13-14-15-16-17-18 + Free Shipping
Hybrid Funnel

3 Ships Free Item

Buy 3 or More Items Marked "3 Ships Free" & They All Ship For Free

Cont. US 48 Only

Hybrid Stone Molds

Developed by Rob Orlando at Hybrid Athletics in Connecticut, Hybrid Stone Molds have been trusted by Strongman athletes for the better part of a decade as a way to produce their own custom-sized Atlas Stones, be it for personal use or as complete sets for multiple athletes in a larger facility.

Unless you lived down the street from an Atlas Stone manufacturer, acquiring these implements in the past generally meant taking on astronomical shipping costs or working out a complicated pick-up. These durable, relatively lightweight plastic molds solve this issue while still enabling a wide range of training options. Molds can be purchased from as small as 10” in diameter (approx. 35 LBS) to as large as 19” (300 LBS), and setting the stones is quite simple.

Each Hybrid Stone Mold divides into two hemispheres. To create an Atlas Stone, start by opening and cleaning the inside of each hemisphere with a lubricant, then re-connect the halves securely via zip ties and position the sphere on a stable base (such as a turned over tire). Create your concrete mix + water at the desired weight corresponding to the mold, then add the mix to the mold, ensuring that the entire mold is filled.

After three days, you can use a tap stick to wedge off the hemispheres and reveal the Atlas Stone, which will also include a Hybrid “H” logo. Any unwanted edges can be smoothed over with sandpaper to complete the process.

Available Stone Mold Sizes

Please Note: Weights listed for each stone mold size are estimates. This can vary due to variation in concrete and the process used to make the stone.


  • Made in the USA
  • Designed by Rob Orlando of Hybrid Athletics
  • Durable plastic construction, lightweight and portable
  • Build multiple stones off of the same mold
  • Available individually or in sets
  • 13 different size options (10” to 19” diameter, resulting stone weight of 35 LB to 300 LB)
  • Will require concrete mix (not included)
  • Atlas Stones will include “H” Hybrid logo

Stone Mold Sizes:

Diameter 10" 10.75" 12" 13" 14" 14.5" 15" 15.5" 16" 17" 18" 18.5" 19"
Weight (LB) 35 50 65 95 115 130 145 160 173 215 250 275 300

Gear Specs

Brand Hybrid
Made In USA Yes
Color Black
Hybrid Stone Molds is rated 4.7 out of 5 by 30.
Rated 5 out of 5 by from Atlas Stone molds I bought these a month ago, and we have been testing out to make different sizes with different weights. Love them.
Date published: 2021-06-22
Rated 5 out of 5 by from First stone and love it Ordered this Hybrid stone and it was so simple to make. Used a laundry detergent bottle (cut to scoop the concrete) to fill the stone. Sprayed the mold, zip tied it together, filled it, let it sit and it came out very well. Used a large plastic trash bag to catch any substance that came out of the seams. Not much at all came out because of the consistency of the mix. No finishing it or smoothing it out for me as it's not too rough. My son, other college athletes and myself have all used the stones numerous times for loading and not one problem with it at all. Great customer service from Rogue and speedy shipping as well. Will definitely order again.
Date published: 2021-06-12
Rated 5 out of 5 by from Great product. Quick delivery too Very happy with my 3 moulds, tempted to buy another now, does anybody have any tips to Make less holes? I do vibrate it and tap it. Tia
Date published: 2020-10-23
Rated 5 out of 5 by from High quality First time buying a mould and it worked better than I ever thought Hele together really well and cleaned up easy ready for next time definitely will be buying another sized mould in the future
Date published: 2020-10-22
Rated 4 out of 5 by from stone mold my second one of these, decent quality mold makes good stones
Date published: 2020-10-20
Rated 5 out of 5 by from Great Product! I use the mold to make atlas balls for my concrete fence. Molds are easy to use and durable material. Lots of complements from my neighbors as the balls were huge and smooth looking.
Date published: 2020-10-02
Rated 4 out of 5 by from Easy to use I've made a couple of Atlas stones using Hybrid molds, now. They're pretty simple to use, and they offer a funnel (I haven't used it) to make things even easier. Some criticism I'd give is that the seam isn't the best design. Slater molds have a better seam design, but they don't have the best options for weights, especially for beginners. Regardless, this will help you make a big heavy rock for picking up, and putting back down, and stuff.
Date published: 2020-07-19
Rated 4 out of 5 by from Quality molds but shrink your logo Hybrid. I’ve been making stones during the lockdown. I have mostly Hybrid molds. Easy to use, clean up nice. One thing stops me from giving 5 stars. The oversized ugly logo. I understand Hybrid want to promote their company. But a smaller logo would be better and wouldn’t effect the actual lifting of the stone. Also putting the weight number on the mold is odd. Depending on product, the stones always weight more. Usually 5-15 pounds more.
Date published: 2020-07-03
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