Very strong and stable!
An absolute monster absolutely love it! Read full review
An absolute monster absolutely love it!
Bells of Steel · Hydra 3″ × 3″
Hydra Four-Post Power Rack – Bells of Steel
A modular four-post rack for squats, bench presses and pull-ups. Choose the dimensions and attachments that suit your space and training.
Supplier photos show example configurations. Safeties and other accessories are included only when selected. Free-weight barbells, plates and benches are sold separately.
A solid base for your home gym
Hydra combines a four-post layout with true 3″ × 3″ uprights and 11-gauge steel. Build a focused barbell setup now, with compatible cable, Smith, training and storage options available as your gym grows.
- True upright size
- 3″ × 3″
- Steel thickness
- 11 gauge / 3 mm
- Bench-zone spacing
- 1″ / 25.4 mm
- Supplier-stated rack capacity
- 454 kg / 1,000 lb
Bells of Steel’s stated rack capacity. Individual attachment ratings and installation requirements also apply.
- Choose from four upright heights and three internal depths to plan around your room. Available options are shown in the builder.
- Fine 1-inch spacing through the front bench zone helps you position the J-cups for your setup.
- Use compatible Hydra attachments to add more training and storage options over time.
Rack specifications
- Upright tubing
- True 3″ × 3″ / 76.2 × 76.2 mm
- Frame steel
- 11 gauge / 3 mm
- Attachment holes
- 5/8″
- Front bench-zone spacing
- 1″ / 25.4 mm
- Finish
- Powder coat
What is included in the essential build?
Four uprights, four side crossmembers, your selected front pull-up bar, your selected back piece and one pair of J-cups. The component list below shows the exact items and quantities for your choices.
Safeties, cable systems, Smith attachments and other extras are optional and start unselected. Free-weight barbells, weight plates and benches are sold separately.
Space, fit and setup
Choose 72″, 84″, 90″ or 108″ uprights and 24″, 30″ or 43″ internal depth, subject to availability. Internal depth is not the total footprint: allow additional room for footplates, attachments, loading plates and overhead movement. Assemble and secure the rack following the manufacturer’s instructions.
Attachments must suit true 76.2 × 76.2 mm uprights with 5/8″ holes. Check third-party attachment fit carefully; tubing size alone does not confirm compatibility.
Loading your rack options…
1. Build your rack
Choose your rack size, pull-up bar, back piece and one pair of J-cups. The starting build uses the lowest-priced available essentials.
2. Make it yours
SafetiesOptional
Optional. Choose no safeties, safety straps with connectors, flip-down safeties or spotter arms. Options match your selected rack depth.
Add a cable systemOptional
Add lat pulldowns and low rows. We match the attachment to your rack height and include any required support crossmember.
Add a Smith attachmentOptional
Choose a supplied Smith bar or use your own compatible barbell. A 72″ rack requires outside mounting; the necessary front foot stabilisers are included in the total.
Add training attachmentsOptional
Choose only the extras you will use. Quantities are per item, pair or pack as labelled.
Add storageOptional
Keep plates, bars and accessories close to your rack. Check access and loading clearance around your finished setup.
Your total
Fit, dimensions and what is included
Hydra uses true 3″ × 3″ (76.2 × 76.2 mm) uprights with 5/8″ holes. The selected height is the upright size and the selected depth is the internal rack depth. Allow room for footplates, plate loading, overhead movement and any attachments. Install and anchor the rack in accordance with the manufacturer’s instructions. Barbells, weight plates, benches and accessories are included only when listed in your parts summary.
Bells of Steel reviews
Hydra 4 post
An awesome addition to my garage gym. Read full review
An awesome addition to my garage gym.
Surprisingly good for a lot less
Upgraded from a 2x3 rack to the BOS Hydra and I have to say, it’s far better quality than what the images convey. Powder coat is very good as are the laser cut holes save one (1 hole wasn...Read full review
Upgraded from a 2x3 rack to the BOS Hydra and I have to say, it’s far better quality than what the images convey. Powder coat is very good as are the laser cut holes save one (1 hole wasn’t completely cut out but BOS immediately replaced the crossmember).
It really is a fantastic option and my only gripes are quite minor.
The bolts should have 2 washers as I bought extras to prevent the split washers from chewing up the beautiful powder coat. That should be a no brainer on BOS part and they could offset the cost simply by using a smaller OD on the washer as the BOS ones are huge.
The attachments (J-cups, spotter arms, etc) should be upgraded to have UHMW liners vs bare powder coat. Even Titan Fitness lines theirs.
And I would prefer the base plate on the uprights to be square to help with stability vs the rectangular plates they use (the same plate on the crossmembers). I get why they use the same plates for cost savings and it does make the packaging easier keeping them flat but I prefer square base plates.
Again, minor tweaks but nothing that detracts from the beastly-ness that is this rack. Highly recommend!
It really is a fantastic option and my only gripes are quite minor.
The bolts should have 2 washers as I bought extras to prevent the split washers from chewing up the beautiful powder coat. That should be a no brainer on BOS part and they could offset the cost simply by using a smaller OD on the washer as the BOS ones are huge.
The attachments (J-cups, spotter arms, etc) should be upgraded to have UHMW liners vs bare powder coat. Even Titan Fitness lines theirs.
And I would prefer the base plate on the uprights to be square to help with stability vs the rectangular plates they use (the same plate on the crossmembers). I get why they use the same plates for cost savings and it does make the packaging easier keeping them flat but I prefer square base plates.
Again, minor tweaks but nothing that detracts from the beastly-ness that is this rack. Highly recommend!
Hydra Rack - 108"
Great "CAGE"...not many options for >100"...able to add heavy bag due to increased height capability...also added two plate-loaded towers...squat rack on one-side and functional trainer o...Read full review
Great "CAGE"...not many options for >100"...able to add heavy bag due to increased height capability...also added two plate-loaded towers...squat rack on one-side and functional trainer on the opposite...complete walk through system. Stay safe.
Awesome equipment - very happy
Great experience. Found everything I needed to get the home gym off the ground. The YouTube videos for building everything was really helpful and quality is exactly what I would expect. ...Read full review
Great experience. Found everything I needed to get the home gym off the ground. The YouTube videos for building everything was really helpful and quality is exactly what I would expect.
I bought 2x barenaked bars, the 4 post hydra, buzzsaw bench and a couple other attachments and safeties to round it out. Would definitely recommend.
I bought 2x barenaked bars, the 4 post hydra, buzzsaw bench and a couple other attachments and safeties to round it out. Would definitely recommend.
Excellent value!
I saved money by picking the rack up in Toronto. This is a tank of a rack. Pictures do not do it justice. Its overbuilt in a good way. My kids are now working out with me, which is a bles...Read full review
I saved money by picking the rack up in Toronto. This is a tank of a rack. Pictures do not do it justice. Its overbuilt in a good way. My kids are now working out with me, which is a blessing. So happy ti support a Canadian company doing good work!
Absolute unit
Very happy with my hydra rack. After using a cheap rack for several years I decided to upgrade to something more substantial. This is a very sturdy rack, the 3x3 uprights and 11 gauge ste...Read full review
Very happy with my hydra rack. After using a cheap rack for several years I decided to upgrade to something more substantial. This is a very sturdy rack, the 3x3 uprights and 11 gauge steel give it a commercial gym feel, and the black powder coat gives it a high quality look. I purchased the bolt on straight pull-up bar and the dip attachment and am quite happy with the quality. I also appreciate that the uprights and crossbeams can be purchased separately, in the future I plan on turning my 4 post into a 6 post rack. The customer service is also fantastic, they were very responsive from my experience. The packaging was all high quality, nothing was damaged on arrival. I live locally but shipping was quite fast, my order arrived 3 business days after ordering.
Fantastic.
Better than my previous Rogue Rack (Monster Lite). EVERYTHING about the rack was better than my previous Rogue SML-2/H2. Seriously. I have no idea how someone would pick that over a Hydra. .Read full review
Better than my previous Rogue Rack (Monster Lite). EVERYTHING about the rack was better than my previous Rogue SML-2/H2. Seriously. I have no idea how someone would pick that over a Hydra. .
Hydra rack
Very nice rack and very solid for the priceRead full review
Very nice rack and very solid for the price
Finally, something for my goblin cave
A solid rack that fits my basement. I have ~81" of space to work with vertically, and short of just getting a squat stand that went to 72" I had very few options until this was released. ...Read full review
A solid rack that fits my basement. I have ~81" of space to work with vertically, and short of just getting a squat stand that went to 72" I had very few options until this was released. It is doing its job admirably, and I barely fit in the uprights vertically to be able to do squats. A word of advice- if you are 6"0' or taller be very careful about pull-up bar selection on 72" uprights. If you attempt to get greedy you will find you have no room to use your power rack for squats.
Great rack
I just put my rack together and love it. Super solid if you bolt it down. Great quality at a really good price I highly recommend.Read full review
I just put my rack together and love it. Super solid if you bolt it down. Great quality at a really good price I highly recommend.
The Small Things
After a month of waiting (Ordered it Nov. 18 and received it Dec. 19) I finally received my rack. Apart the top pieces popping off ever so slightly on all the uprights, the rack is amazin...Read full review
After a month of waiting (Ordered it Nov. 18 and received it Dec. 19) I finally received my rack. Apart the top pieces popping off ever so slightly on all the uprights, the rack is amazing. Welds are great, the lazer-cut numbering is amazing, finish...everything about the rack is great. However, the reason I'm giving it a 3 is because shipping and customer service is honestly a hassle. Took over month to finally receive the rack. I wouldn't be too upset over it (with it being the holidays) if I was able to receive my information or contact support easily enough. Took many trys to talk with someone and each time I did, they said they would send my tracking number and all relevant information to my email. Never did. I was surprised by my rack arriving. I was actually about to try and cancel my order on the day it arrived because i was tired of waiting and not knowing. Well, at least I finally have my rack. So I went to assemble it and all that. Well turns out they never sent the pieces that the safety straps attach to that connect to the rack. This, after ordering the spotter arms initially but was *graciously* upgraded to the safety straps, after being told the arms were on hold till February. I figured the pieces come with it but I guess I was wrong. So now I have a pair of 150ish dollar straps but no safety equipment of any kind. It's this kind of stuff that just gets infuriating...
TL:DR the rack itself is great but the extras associated with it, shipping, and customer service may end up ruining your experience
TL:DR the rack itself is great but the extras associated with it, shipping, and customer service may end up ruining your experience