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BELLS OF STEEL / RACK ATTACHMENTS & COMPONENTS

Choose the fit for your setup.

Leg Extension / Curl Rack Attachment

Add seated leg extensions and standing single-leg hamstring curls to a compatible power rack without dedicating floor space to a separate machine.

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£299.99

VAT included. Free shipping.

  • Plate loaded
  • Extensions and curls
  • Match rack fitting
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Parts, adapters and upgrades

For compatible existing equipment. Select a part instead of the main product option.

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Check the selected option and product details for quantities, compatibility and included items. Other equipment shown in photos is for illustration.

Leg Extension / Curl Rack Attachment

Bells of Steel reviews

Outstanding addition

Scooped this up a month or so ago. Overall I’m very pleased the leg extensions require a band to get the most of the workout as stated in many other reviews. I set mine up pretty low so i...Read full review
Scooped this up a month or so ago. Overall I’m very pleased the leg extensions require a band to get the most of the workout as stated in many other reviews. I set mine up pretty low so it wouldn’t interfere with my bench. I like the multiple adjustments and found the “decline setting of the seat worked best for me. Aside from what’s stated as an extension an hammy curl I also use it as a glute bridge and calf raise.

Hydra (3" x 3"; 5/8" Holes)

Incentivised review

Nice addition.

Works great, easy to set up. Great addition for leg day at home. Need to figure out how to attach to my low pulley without the leg roller flipping up. No complaints Read full review
Works great, easy to set up. Great addition for leg day at home. Need to figure out how to attach to my low pulley without the leg roller flipping up. No complaints

2.3" x 2.3" (5/8" Holes)

Incentivised review

Worked perfect with my 3x3 rack by GetRXd.

Easy to assemble, came in two separate boxes. Easy to use and adjust. Read full review
Easy to assemble, came in two separate boxes. Easy to use and adjust.

Manticore (3" x 3"; 1" Holes)

Incentivised review

Great attachment!

Fits my 3x3 perfectly. Super heavy so a little cumbersome if you plan on taking it off/on regularly . Takes a minute to figure out the correct position/height for hamstring curls but it’s...Read full review
Fits my 3x3 perfectly. Super heavy so a little cumbersome if you plan on taking it off/on regularly . Takes a minute to figure out the correct position/height for hamstring curls but it’s a one-time thing. Highly recommend and great price point too.

Hydra (3" x 3"; 5/8" Holes)

Incentivised review

Added a picture

A great unit, feels rock solid, is silky smooth, and jacks up the quads. I love this thing.Read full review
A great unit, feels rock solid, is silky smooth, and jacks up the quads. I love this thing.

Hydra (3" x 3"; 5/8" Holes)

The perfect addition to my home gym!

Initially I was a little skeptical with the leg extension purchase. For two reasons. The first being, the rack I have is a different manufacturer and no 5/8s holes but still 3” columns. T...Read full review
Initially I was a little skeptical with the leg extension purchase. For two reasons. The first being, the rack I have is a different manufacturer and no 5/8s holes but still 3” columns. The second reason, some times ancillary products like this never work as advertised and do not have the same manufactured quality one expects…

As to my first hesitation. I’m extremely happy to report that this leg extension fits perfectly on my rig. I was able to drill a 5/8” hole myself and mount with ease.

Secondly, the overall quality of this unit blew away my expectations. It’s very heavy duty! Works exactly as advertised! Very smooth range of motion! It’s exactly what I needed to take my leg workouts to the next level.

If you’ve been looking for a leg extension machine for you home. Look no further!! This piece of equipment is exactly what you need!

Hydra (3" x 3"; 5/8" Holes)

Leg Curl / Leg Extension Rack Attachment

I’m seriously impressed! This is exactly what I was looking for. The quality and build are top-notch—super solid and sturdy. It’s also incredibly easy to set up and take down when you're ...Read full review
I’m seriously impressed! This is exactly what I was looking for. The quality and build are top-notch—super solid and sturdy. It’s also incredibly easy to set up and take down when you're done. If you’re tight on room, this is a total game-changer.

Manticore (3" x 3"; 1" Holes)

Product good, quality control bad

I did a lot of research before purchasing these and read all the reviews here. I’m happy with the product itself. It has its limitations but does what it’s supposed to do. Attaching a ban...Read full review
I did a lot of research before purchasing these and read all the reviews here. I’m happy with the product itself. It has its limitations but does what it’s supposed to do. Attaching a band definitely helps the initial part of the strength curve.

My biggest gripe, and this tends to be the case with anything I’ve ordered from BOS, is that the product always shows up road worn. The finish is chipped and worn off. There are scratches all over the place and the packing wasn’t that secure in the box. It’s my hope that BOS addresses their quality control when it comes to packing and what’s being sent. Because although I like their products, particularly because they use imperial system sizes that fit my rogue equipment, the finish quality of what I receive is becoming a turn-off.

Manticore (3" x 3"; 1" Holes)

Solid enough

I watched a couple reviews before purchase so I had an idea of the cons of the unit in terms of ROM and no tension at the bottom of the lift. Tension was easily fixed by a resistance band...Read full review
I watched a couple reviews before purchase so I had an idea of the cons of the unit in terms of ROM and no tension at the bottom of the lift. Tension was easily fixed by a resistance band to a plate peg. This caused the unit to twist, which was countered with a strap I had lying around for my canoe. This made the platform solid. I do my hamstring curls lying down and had to add a J hook where the adjustment bolt would touch the rack as it would cam over and be stuck at the top, this prevents it from locking out.

Only negative I can find is the seat wood is weak and starts to bow opposite the plate loaded side (I weigh about 203lbs) otherwise solid piece of kit. Definitely does the trick for small form factor. Yes it’s heavy and awkward, but that’s why we workout, so we can handle heavy and awkward things.

Manticore (3" x 3"; 1" Holes)

Incentivised review

leg curl/ extension attachment

4 star review. the machine almost fits my 3x3 rack from xtreme monkey. the machine does a fantastic job for leg day just add a band to it to create more tension on the down ward portion....Read full review
4 star review. the machine almost fits my 3x3 rack from xtreme monkey. the machine does a fantastic job for leg day just add a band to it to create more tension on the down ward portion. it is a solid build and can carry alot of weight. I wish it fit snuggly in my rack I had to add wedges to keep it from swaying.

Manticore (3" x 3"; 1" Holes)

Leg ext

Overall design is great, am using on a Rep 5000 rack with no fitment issues. Like the concept of the eyelet for cable attachment but disliked how it moved the pad around on the bottom p...Read full review
Overall design is great, am using on a Rep 5000 rack with no fitment issues.

Like the concept of the eyelet for cable attachment but disliked how it moved the pad around on the bottom pad pivot point almost would have like the pad to be solid at the end of extension arm. No issues when only plate loaded.

Due to the weight and awkward center of gravity it would be nice if there was handle mounted for easier instal and removal.

Other than the things above it fills a void I had missing in my home gym at a good price point and i would repurchase if I had to.

Manticore (3" x 3"; 1" Holes)

Attached to my non BOS rack and pulley system

Took a risk and ordered to try with another branded rack and pulley system. I didn't want to go through buying yet another bench and attachment or a separate machine so I took a punt on b...Read full review
Took a risk and ordered to try with another branded rack and pulley system. I didn't want to go through buying yet another bench and attachment or a separate machine so I took a punt on buying this from BOS to attach to my rack.
I've then attached a pulley. Don't get me wrong this isn't perfect but man it's helpful and convenient to attack quads in isolation without taking up a crazy amount of space. attached to my PR4000 rep rack and ares 1.0. I've tried it with stand alone weights and with different attempts of pulleys with various cables. I've found this so far the most convenient for me in terms of space taken and where I can leave it with quick pulley attachment. Images seem to not be uploading to show it.

Hydra (3" x 3"; 5/8" Holes)

Hydra Leg Extension

Great product so far. Super happy with it. Would be 5 stars but it’s challenging to store it with how the pins insert. Read full review
Great product so far. Super happy with it.
Would be 5 stars but it’s challenging to store it with how the pins insert.

Hydra (3" x 3"; 5/8" Holes)

Nice add-on

Very nice add-on for my cable tower and a great trade off for not having a dedicated machine but it can be a bit awkward putting it on/taking it off. I'm hoping it gets a bit more easy t...Read full review
Very nice add-on for my cable tower and a great trade off for not having a dedicated machine but it can be a bit awkward putting it on/taking it off.

I'm hoping it gets a bit more easy to use/keep set up when I replace my current rack with a BoS squat rack :)

2.3" x 2.3" (5/8" Holes)

Leg curl

Great addition to our rack. Wish it sat a bit tighter but works as intended and build quality is great Read full review
Great addition to our rack. Wish it sat a bit tighter but works as intended and build quality is great

2.3" x 2.3" (5/8" Holes)

Rack attachments & components

Details that matter

The facts, fitting notes and package information for this product.

Add seated leg extensions and standing single-leg hamstring curls to a compatible power rack without dedicating floor space to a separate machine.

  • Plate-loaded rack attachment for quadriceps and hamstring training.
  • Supplier-stated weight plate capacity: 250 lb / approximately 113 kg.
  • Supplier-stated user capacity: 250 lb / approximately 113 kg.
  • Choose the 2.3-inch, Hydra or Manticore fitting to match your rack tubing and hole size.

Installation: your rack must be bolted down when this attachment is in use. The supplier recommends inside-rack mounting for maximum stability. Weight plates and resistance bands are sold separately.

Bells of Steel leg extension curl rack attachment — product image 2
Bells of Steel leg extension curl rack attachment — product image 3

Before you order

What does my selection include?

The option name identifies the size, finish, fitting or pack being purchased. Product details below list supplied items and any separately sold accessories. Quantity applies to that selected option.

How do I check compatibility?

Match the exact dimensions, rack system, hole size and mounting requirements stated for the selected option. Contact BlackBear if you are unsure before ordering.

Is shipping included?

Yes. Free shipping is included. Check the selected option and package details before ordering.

Product reviews

EMPTY DOM REMOVE PROTECTOR