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Shoulder Boulder/Chest Fly Attachment

4.7
Rated 4.7 out of 5 stars
9 Reviews
$363.99 AUD

Build boulder shoulders & poppin’ pecs with this compact attachment.

Shoulder Boulder/Chest Fly Attachment
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Product Features

  • BUILD 3D DELTS

    Ditch the dumbbells and get more out of every rep! The smartly positioned weight horns increase tension at the bottom, where dumbbells fall short, targeting your delts more effectively. Perform lateral raises, single-arm front raises and rear delt flies to leave no delt undone on this full-shoulder solution!

  • UNLOCK CHEST FLIES

    On dumbbell chest flies, your biceps steal the show and pushing to failure feels more like gambling than training. But thanks to the Shoulder Boulder’s design, that sweet burn stays focused on your chest muscles. Plus, the 360° dial sets the ideal starting position AND acts as a safety catch—because your pecs deserve better odds than the roulette table.

  • COMPACT SHOULDER & CHEST STATION

    Why let a bulky machine take over your home gym? The Shoulder Boulder Lateral Raise Attachment mounts directly to your power rack and occupies a fraction of the footprint of a rear delt/chest-fly machine. This keeps your Castle of Gainz clutter-free; after all, the best gym is one you can actually walk through.

Product Details

Build boulder shoulders and poppin’ pecs for that iconic V-taper look!

Dumbbell shoulder and chest isolations suffer from inconsistent resistance, but the Shoulder Boulder’s design provides smooth, controlled movement with a superior resistance profile.

A standalone rear delt/chest fly station takes up a whopping 5-foot x 5-foot footprint (or more), while this rack attachment mounts to your rack to save space. Easily adjust its height on your power rack for the ideal fit.

This nifty unit uses weight plates, saving you money. Plus, easily micro-load the smaller muscles of your shoulders to minimize injury and get better gains!

While it doesn’t beat a cable machine for chest flies, the Shoulder Boulder comes in as a close second. Set it low & wheel over a bench (or mount a Seal Row Pad) for better chest flies that keep the tension exactly where it belongs: on your pecs.

With the new tightener knob and updated UMHW lining, the new 3" x 3" Shoulder Boulder fits securely on any 3" x 3" (75mm x 75mm) rack.

The 2.3" x 2.3" Shoulder Boulder is compatible with any 2.3" x 2.3" Cable Towers, All-in-One Trainers, or Power Racks with 2.3" x 2.3" (60mm x 60mm) uprights. 

IMPORTANT: For user & equipment safety, ensure your rack or cable tower is bolted down or otherwise secured. Tighten the spin lock before each use. Locking on your weight plates with collars is highly recommended.

PRODUCT SPECS

4.7
Rated 4.7 out of 5 stars
Based on 9 reviews
Total 5 star reviews: 7 Total 4 star reviews: 1 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
89%would recommend this product
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9 reviews
  • PS
    Peter S.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    Yesterday
    Best Chest/ Shoulder attachment

    The Bells of Steel chest and shoulder attachment is the best on the market! I love the easy to use and versatility it offers for any rack not just BoS. Add that extra ummpf to your workout without compromising space.

    Was this helpful?
    Bells of Steel Canada
    12 minutes ago

    Thanks a bunch for the stellar review, Peter! We're pumped to hear that the Shoulder Boulder/Chest Fly Attachment is a game-changer in your workouts. Easy to use and versatile? Just how we like it! Big thanks for the photo and video, too – they really bring your words to life!

    Yours in strength,
    The B.o.S. Crew.

  • A
    Alan
    Verified Buyer
    Rated 3 out of 5 stars
    3 days ago
    Decent, poor quality control

    Works as intended. Def has loose metal shavings in the arms which rattle when using. Irritating. Also the weight arms are misaligned, well the selector plate is. So the handles don’t start at the same angle. Irritating, if you have OCD. Does work fine for shoulders. Chest is meh.

    Was this helpful?
    Bells of Steel Canada
    3 minutes ago

    Hey Alan, thanks for sharing your experience and those snapshots. We’re sorry to hear about the loose metal shavings and misaligned selector plate! Please reach out to support@bellsofsteel.com if you would like to further discuss this issue. We appreciate you bringing this to our attention!

    Yours in strength,
    The B.o.S. Crew.

  • 이병
    이 병.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    3 days ago
    어깨운동에 최적화

    대한민국에도 없는 홈트레이닝용 어깨운동기구입니다.

    이 운동기구는 내 어깨를 변화시킵니다.

    항상, 함께 하고 있습니다.

    나의 작은 헬스장에서 여러 회원들이 함께 사용하고 있다.

    그 회원들도 자주 사용하고 만족해 한다.

    이 머신은 최고다.

    Was this helpful?
  • JB
    Justin B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    Decent space saving attachment

    Takes a bit of work to get everything adjusted properly and setup. Not as nice as a stand alone piece, but does the job. I find the workout is better if you hook to cable machine instead of using free weights. Free weights don’t keep muscles under tension for full range in my opinion .

    Was this helpful?
    Bells of Steel Canada
    1 week ago

    Thanks a ton for the detailed review and the stellar 5-star rating, Justin! We're pumped to hear that the Shoulder Boulder/Chest Fly Attachment is delivering as a solid space-saving solution for your setup. You're absolutely spot-on about the cable machine setup—that constant tension throughout the full range of motion really does make all the difference for maximizing those gains! Here's to efficient workouts and epic shoulder and chest development!

    Yours in strength,
    The B.o.S. Crew.

  • CW
    Cory W.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    Very nice attachment! Blows up the shoulders!

    Have really enjoyed this attachment! It works well for lateral raises, single arm front raises, rear delt raises as well as pec flys! Great addition to my home gym.

    Was this helpful?
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The Bells of Steel Shoulder Boulder/Chest Fly Attachment is a black mechanical device with adjustable arms and knobs, ideal for chest fly exercises to build the Shoulder Boulder look.
Bells of Steel

Shoulder Boulder/Chest Fly Attachment

$363.99 AUD

Build boulder shoulders and poppin’ pecs for that iconic V-taper look!

Dumbbell shoulder and chest isolations suffer from inconsistent resistance, but the Shoulder Boulder’s design provides smooth, controlled movement with a superior resistance profile.

A standalone rear delt/chest fly station takes up a whopping 5-foot x 5-foot footprint (or more), while this rack attachment mounts to your rack to save space. Easily adjust its height on your power rack for the ideal fit.

This nifty unit uses weight plates, saving you money. Plus, easily micro-load the smaller muscles of your shoulders to minimize injury and get better gains!

While it doesn’t beat a cable machine for chest flies, the Shoulder Boulder comes in as a close second. Set it low & wheel over a bench (or mount a Seal Row Pad) for better chest flies that keep the tension exactly where it belongs: on your pecs.

With the new tightener knob and updated UMHW lining, the new 3" x 3" Shoulder Boulder fits securely on any 3" x 3" (75mm x 75mm) rack.

The 2.3" x 2.3" Shoulder Boulder is compatible with any 2.3" x 2.3" Cable Towers, All-in-One Trainers, or Power Racks with 2.3" x 2.3" (60mm x 60mm) uprights. 

IMPORTANT: For user & equipment safety, ensure your rack or cable tower is bolted down or otherwise secured. Tighten the spin lock before each use. Locking on your weight plates with collars is highly recommended.

Shoulder Boulder/Chest Fly Attachment

  • 3" x 3" (5/8" & 1" Holes) - Hydra & Manticore
  • 2.3" x 2.3" (5/8" Holes)
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