Products on pre-order are not eligible for Bench Week discounts. Get 10% off a BlackWing™ or Nighthawk™ adjustable bench with code BENCH10 in checkout.
Ordering the Leg Extension & Leg Curl Attachment does not include the bench.
Build Your Package
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BlackWing™ -
Nighthawk™
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ZeroGap® - AB-5000
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Spring Clips
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Leg Extension & Leg Curl Bench Attachment Cable Kit
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5-15 lbs Resistance Pair -
5-35 lbs Resistance Pair -
20-60 lbs Resistance Pair
ADD-ON
Orders placed on November 21, 2025 are estimated to start shipping by . If already purchased refer to your order confirmation for ship date.
Orders placed on November 21, 2025 are estimated to start shipping by . If already purchased refer to your order confirmation for ship date.
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Overview
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Features
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Dimensions
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Media Gallery
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FAQS
Bring commercial-quality leg workouts into your home gym with the best Leg Extension and Leg Curl Bench Attachment. This compact, space-saving accessory instantly transforms your REP® BlackWing™, Nighthawk™, or AB-5000 bench into a versatile leg isolation station — no need for bulky, standalone equipment. Effortlessly switch between leg extensions and prone hamstring curls for a complete lower-body session.
Easily attach it to your weight bench using the convenient 2 lock-pin mechanisms — a quick, one-person setup with no heavy lifting. Choose from three resistance options to match your training style: dual-sided plate-loaded weight horns, integrated band pegs for resistance bands, or connect directly to ANY cable machine with the optional Cable Kit add-on — supporting up to 250lbs of resistance. The built-in cam lever ensures smooth, consistent tension, while the optimized strength curve challenges your quads and hamstrings through their strongest and weakest points for more effective results.
Adjustable shin pads and built-in side handles keep you secure when using this hamstring curl or leg extension attachment, and the flat thigh pad distributes pressure evenly — unlike standard round pads that pinch — for a more comfortable, pinch-free experience during leg curls.
Product Highlights:
- • 2-in-1 Functionality: Perform both hamstring curls and leg extensions with this leg attachment for bench.
- • 3-in-1 Resistance Capabilities: Add challenge with weight plates, resistance bands, or an optional cable machine attachment.
- • Optimized Strength Curve: Resistance remains consistent from start to finish thanks to the placement of the cam as well as strategic use of bands — outperforming other leg curl bench attachments on the market.
- • Bench Compatibility: Fits the REP® BlackWing™, Nighthawk™, or AB-5000 exercise bench.
- • Limit the Effort to Your Workout: Simple and quick installation, and built-in transport wheels for effortless setup and storage at home.
- • Comfort and Control: Anchor yourself with built-in side handles, get comfortable with adjustable shin pads and flat thigh pads to provide balanced support, and secure your weight plates with the included spring clips.
Watch Our Videos:
REP Leg Extension & Leg Curl Bench Attachment Engineering Video: Complete Review & Feature Details
What to Know When Using Resistance Bands w/ The REP Leg Extension & Leg Curl Bench Attachment
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MULTI-FUNCTIONAL DESIGN
Train quads and hamstrings with one space-saving attachment. Move seamlessly from leg extensions to prone leg curls without swapping gear — ideal for supersets and efficient sessions. -
3 RESISTANCE OPTIONS
Choose your resistance — plates, bands, cables, or any combination — to train your way. Dual-sided, plate-loaded weight horns and integrated band pegs make loading fast and seamless, while the optional bolt-on cable kit lets you connect directly to any cable machine. -
COMFORT & ADJUSTABILITY
Lock in for leg extensions with the side handles, while adjustable shin pads let you customize this attachment to fit your body. The flat thigh pad spreads the load evenly across your legs — unlike a traditional roller — making leg curls more comfortable. -
STRENGTH CURVE
Each form of resistance has an optimized strength curve often missing from other brands' attachments. Pairing resistance bands with weight plates ensures consistent tension throughout your range of motion, and the built-in cam lever ensures smooth, consistent tension when attached to a cable machine. A refined, optimized strength curve challenges your quads and hamstrings through their strongest and weakest points for more effective results. -
ENGINEERED FOR STRENGTH
A wide, solid base plants this unit to the floor so it won’t shift, sway, or tip — even when you’re moving the full 250 lbs it’s rated for. The overbuilt frame and reinforced stance deliver superior stability and a locked-in feel rep after rep. No flex, no wobble, no flimsy shortcuts — just dependable strength you can trust under max load. -
ROLL TO POSITION, PIN TO TRAIN
Built-in wheels do more than make storage easy — they let you slide, tweak, and dial in your setup in seconds, especially handy when using the optional cable attachment. Installation is just as simple: attach the receiver brackets and secure the unit to your bench with the 2 lock-pin mechanisms. It’s a quick, one-person setup with no heavy lifting required.
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Length33.3" / 846mm
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Width25.5" / 648.7mm
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Height36.2" / 918.5mm
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Leg Roller Length9.4" / 240mm
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Leg Roller Diameter5.5" / 140mm
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Weight Horn Length7" / 177mm
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Weight Horn Diameter2" / 50mm
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Handle Length8.3" / 212mm
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Loadable Weight Capacity250lb / 113.6kg
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Bench Decline Angle15 degrees
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Height adjustments of extension roller (to center of roller)12.5-17.5" / 317.5-445mm
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Height adjustments of curl roller (to center of roller)33.6-35.4" / 852.5-900mm
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Minimum distance from trolley for cable use (from front of bench foot plate to end of carabiner)43" / 1100mm
VIDEOS
- REP Leg Extension & Leg Curl Bench Attachment Engineering Video: Complete Review & Feature Details
- What to know when Using Resistance Bands w/ The REP Leg Extension & Leg Curl Bench Attachment
REP Leg Extension & Leg Curl Bench Attachment Engineering Video: Complete Review & Feature Details
BLOGS
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How To Build More Muscle on Leg Day With the Lying Leg Curl — CPT Approved
Targeted hamstring action.
read full story -
How to Build Your Quads with Seated Leg Extensions — CPT Approved
Quads of the gods.
read full story
The Leg Extension & Leg Curl Bench Attachment is compatible with the REP® Nighthawk™ - Adjustable Bench,
BlackWing™ Adjustable Bench, and ZeroGap® - AB-5000 Adjustable Bench with both the standard and wide bench pads.
Resistance Options
REP x Dialed Motion attachment: Only sectorized cable resistance with the built-in cable retractor.
REP variant: Three resistance options (plate loaded, resistance bands, cable). Users can choose to mix and match or use all three at once for the REP variant.
Exercises
REP x Dialed Motion attachment: 3 lower body movements (leg extensions, prone leg curls, as well as seated leg curls)
REP variant: 2 lower body movements (leg extension and prone leg curl)
Storage
REP x Dialed Motion attachment: Not free standing and requires a rack mount or wall mount storage holder when not in use.
REP variant: Equipped with a wheeled base for maneuverability and free-standing storage.
Compatibility
REP x Dialed Motion attachment: Will be compatible with additional benches on the market (final list TBD).
REP variant: Compatible with the REP® Nighthawk™ - Adjustable Bench, BlackWing™ Adjustable Bench, and ZeroGap® - AB-5000 Adjustable Bench with both the standard and wide bench pads.
Adjustable Handles
REP x Dialed Motion attachment: Has adjustable knurled handles that can be set based on the desired exercise (final positions TBD).
REP variant: Has fixed rubber coated handles.
No, these benches are not compatible.
We cannot guarantee compatibility due to machining/manufacturing differences between companies.
No, this attachment cannot be used as a freestanding leg extension/leg curl machine.
You can perform leg extension and leg curl variations, decline sit-ups, and decline bench.
The bench decline angle is 15 degrees.
Yes, only one person is needed for installation. Unboxing and product assembly is estimated to take 1-2 hours. All the tools you need will be included.
The total weight capacity of the attachment is 250lbs. You can combine all three resistance options if they do not exceed 250lbs. The starting weight is 12.7lbs.
The Leg Extension & Leg Curl Bench Attachment has an optional Cable Kit that allows you to connect your attachment directly to any cable machine in addition to the built in weight horns.
Disconnect the top cable attachment point when using only weight plates and/or resistance bands and storing the coiled cable. This prevents the machine from pulling on the coiled cable and causing it to jam.
Considering you can only mount a Smith machine on the inside of your rack with a cable machine, the cable trolleys are still accessible and can be attached via the cable connection kit.
Yes. You can make sizing adjustments while the cable machine is attached.
Yes. The cable attachment for the Leg Extension & Leg Curl Bench Attachment can be found here.
Yes. Adapters for the the REP® Nighthawk™ - Adjustable Bench, BlackWing™ Adjustable Bench, and ZeroGap® - AB-5000 Adjustable Bench are available for purchase here.
The unit is self supporting, so it can be wheeled to the desired storage space when not in use. While the base plate does allow this attachment to stand with plates loaded, we do recommend removing plates prior to removing this from your bench. This attachment can be stored comfortably with 2 x 45lb plates on it.
The tube adapter stays attached to your bench, not attached to the Leg Extension & Leg Curl Attachment. It can remain installed or be removed from the bench to allow for use of the Adjustable Bench Leg Roller Attachment as well as future attachments that will use the tube port. The adapter that mounts to the rear foot of the bench remains bolted, but still allows for vertical bench storage. This part will limit incline bench capabilities as it will contact the Ares™ 2.0 foot plate depending on user size.
Band resistance: 2 bands are recommended, but you can utililze different bands on each side depending on your desired tension.
Plate resistance: Yes, plates can be loaded unevenly depending on your desired weight.
If you have the Cable Kit installed: Disconnect the top cable attachment point when using only weight plates and/or resistance bands and storing the coiled cable. This prevents the machine from pulling on the coiled cable and causing it to jam.
This attachment works with the Adonis™ - Cable Tower (on its low row cable), Ares™ 2.0, Athena®, Arcadia™ - Functional Trainer, Arcadia™ Max Functional Trainer, Selectorized Lat Pulldown and Low Row (1000 Series), Selectorized Lat Pulldown & Low Row (4000/5000 Series), and Plate-Loaded Lat Pulldown & Low Row (4000/5000 Series).
Yes, this is ok. The back pad is supported by the adapter at the top of the Leg Extension & Leg Curl Attachment.
Structural welds on attachments and frames have a lifetime warranty*. Upholstery (pads) have a 30-day warranty. Pop-pins, pulleys, bearings, and cables have a 1-year warranty.
Two to three depending on what is purchased. The standard plate loaded unit will ship in two (base, adapter). The cable kit will add an additional package for a total of 3 boxes.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
