Parcel ground shipping
Items weighing 149 lb or less ship by ground parcel rather than freight.
Receive by Nov 13estimated, may change
New
BUILT Strength Fractal Series Leg Extension
300 lb weight stack
A rare stack size for selectorized machines
$3,495.00
4.8
ConditionNew
Availability
Available to Order
Pay over timeBusiness financing
Business financing from $…/mo*
*Estimate, subject to credit approval.
Parts & Labor, Plus Lifetime Frame
New equipment. Coverage starts on the date of delivery.
Shipping calculator
Enter your state and ZIP code to see delivery options and prices.
Machine overview
Condition: New
Warranty: 1 Year Parts & Labor (Extended Available)
Returns: 30-Day Returns & Exchanges
Shipping: Driveway Delivery, or Inside Delivery & Assembly
Receive by: Nov 13
How It Ships: Crated w/ Assembly Manual
Delivery options
How delivery works
Your item’s shipping method and price are confirmed in the shipping calculator and at checkout. Here is what each delivery path means.
Driveway freight delivery
Your equipment is palletized and protected. The freight carrier schedules delivery, then uses a liftgate to lower it to your curb or driveway. Moving it inside and unpacking it are up to you.
Inside delivery & assembly
When selected and available for your address, the delivery team brings the equipment into the room, assembles and tests it, then removes the packaging.
Full truckload
For commercial builds and multi-pallet orders, a dedicated trailer keeps the full order together in one delivery. We confirm the unloading plan before the truck ships.
Size: 65" × 42" × 58" tall
What New Means
Brand new, current-model equipment shipped in the factory crate with the full manufacturer warranty. Extended coverage is available at checkout.
Warranty Coverage
New and remanufactured equipment are both covered for one year, parts and labor, backed by us. Extended protection is available on either through BAG Care+. Used equipment is sold as-is with no warranty coverage, and is described honestly before you buy. We service nationwide - every ZIP code in the country - so coverage travels with the machine.
30-Day Returns & Exchanges
Change your mind within 30 days of delivery and you can return the machine or exchange it for a different size, color or configuration.
Return shipping is the customer's responsibility and a 15% restocking fee applies to preference returns and exchanges. Freight items must go back packaged to the same standard they arrived in. We will tell you exactly what that means before anything is collected.
Anything that arrives damaged or fails under warranty is handled separately and carries no restocking fee. Full terms are in our Returns, Exchange & Refund Policy.
Add before it ships
Before the freight bookingCoverage and accessories have to go on the same booking as the machine. Add them here and they travel together.
Extended warrantyRecommendedEvery machine includes 1 year parts and labor.
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Build A Gym
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a month ago
★★★★★
Great communication, products, and I'm very happy with what I purchased from them. I will be back!
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a month ago
★★★★★
Just want to say thank you to the team at CTX!! Not only was shipping fast and efficient, but customer service was outstanding!! Any question that was needed to be answered was meet with a quick response. Thank you again!!
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a month ago
★★★★★
Dillon was very helpful, patient with answering all my questions, very knowledgeable. He insured I had all the necessary answers before I made my purchase. Thanks Dillon, great customer service!
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2 months ago
★★★★★
I was thinking about getting Ozempic, but I’m not in the mood to go blind yet. So I decided I’d do it the old fashioned way and called CTX.
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2 months ago
★★★★★
CTX Built is a great company to work with. Excellent communication and customer service. Their team was easy to work with and extremely helpful. Would do more business with them and I plan to.
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2 months ago
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CTX stands by their products. I recently purchased a Precor elliptical from them & it arrived with a mechanical flaw. They coordinated with a technician to get my product fixed like new. They accomplished this despite the fact that my home was two states away. Special thank you to Nichole for staying accessible and attentive throughout the process!
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2 months ago
★★★★★
Great product and awesome leadership. Equipment was straight forward to build and team is always responsive when needing information or any help whatsoever. So glad I found them for outfitting my gym, best decision I have ever made for my business!
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2 months ago
★★★★★
Absolutely best in business! Not only is Dillon just genuinely a great human being, he’s real and honest. Loved everything I’ve gotten from him and the team. I’m about 10-15 pieces in deep with him and not stopping anytime soon! Absolutely recommend hitting these guys up for home/commercial equipment. New or refurbished!
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4 months ago
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Excellent selection of products with a large selection, consultants will help you decide
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4 months ago
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Dillion was great to work with!! Super friendly, quick turn around time, and great at communicating! The guys who delivered it Robb and JJ were also amazing. They came prepared and were very fast and efficient. They offered to help us move around other equipment to ensure we loved our gym! Super nice people and an amazing company! I would highly recommend working with them. Oh and the equipment itself is high quality and looks great in our home gym!
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5 months ago
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I inquired to sell a few machines from my personal training studio. From beginning to the end, customer service was great! CTX was very quick with responses and communication was there! I very much will take my business back to CTX, and I highly recommend them.
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I can’t say enough great things about CTX Home Gyms. They did an incredible job on both my commercial gym and my home gym setup. The entire process was seamless from beginning to end — professional communication, top-quality equipment, attention to detail, and outstanding customer service.
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5 months ago
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Dillon and his team outfitted my entire new gym. We worked together from the beginning stages. They had the same exact vision I had. They did everything possible to make our dream gym. And they did!!
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The entire experience was amazing. I literally told them what I wanted and they made it even better. The Build line is amazing. I get compliments on it daily. From the stitching on the equipment to how smooth it is. I can not say enough good things about it. And the plate loaded build equipment is legit. I’m an equipment snob. I love finding the old pieces. But this stuff is even better. Pure quality and can stand some big weights!
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Our own equipment line
What BUILT Strength is
Commercial-grade gear we design, stock and stand behind, sold only through Build A Gym.
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Heavy commercial steel
Frames are laser-cut and welded from heavy-gauge steel, built for daily commercial use.
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We audit the factory’s work
Our team audits the factory regularly, checking machines, welds and finishes before they ship to Texas.
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Stocked in Texas
Most of the range ships from our Jarrell, TX warehouse. Try it first at our Georgetown showroom.
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Delivered and backed for life
1 year parts and labor plus lifetime frame coverage. Add inside delivery and assembly at checkout.
Product details
Commercial-grade equipment, inspected and supported by warranty.
The BUILT Strength Fractal Series Leg Extension isolates the quadriceps through a seated extension with an ergonomic seat angle engineered to reduce knee pressure - the seat geometry positions the hip and thigh in the correct relationship to the knee joint, distributing the extension forces more evenly across the patellar tendon and reducing shear stress under heavy loading. An adjustable backrest and pivoting ankle pad accommodate different leg lengths for precise positioning before every set.
A 300 lb selectorized stack supports bilateral and unilateral leg extensions with smooth, consistent tension through the full extension arc. A 636 lb heavy-duty commercial steel frame delivers the structural stability and longevity for sustained professional quad isolation training. New.
Primary muscles targeted
Rectus Femoris Vastus Lateralis Vastus Medialis Vastus Intermedius
Secondary muscles
Hip Flexors Tibialis Anterior
Key features
Ergonomic Seat Angle - Reduced Knee Pressure
The seat angle positions the hip and thigh correctly relative to the knee joint - distributing extension forces more evenly and reducing patellar tendon shear stress under heavy loading for joint-friendly quad isolation training.
Adjustable Backrest & Pivoting Ankle Pad
An adjustable backrest and pivoting ankle pad accommodate any leg length and preferred starting position - keeping the knee joint correctly aligned with the pivot axis for consistent quad loading across all user sizes.
Bilateral & Unilateral Extension
Both legs together for standard bilateral quad development, or single-leg unilateral work for addressing left-right strength imbalances - both options supported by the same 300 lb selectorized stack without any attachment change.
300 lb Stack · 636 lb Commercial Frame
A 300 lb selectorized stack covers light quad activation through serious progressive loading. The 636 lb commercial-grade steel frame provides the structural stability for sustained high-frequency professional quad isolation training.
Specifications
Dimensions (L × W × H)
65" × 42" × 58"
Machine Weight
636 lb
Weight Stack
300 lb
Pin-select selectorized
Condition
New
Fractal Series · BUILT Strength
Design & Adjustability
Ergonomic Seat Angle · Adj. Backrest & Pivot Pad
Joint-friendly seat angle · Adjustable backrest & pivoting ankle pad · Bilateral & unilateral · 300 lb selectorized
Frame
11-Gauge (3mm) Steel
PDF
Assembly manual
BUILT Strength Fractal Series Leg Extension
The step-by-step factory guide for putting this machine together. Handy to look over before delivery day.
View manual
Download PDF
Rather not build it?
We will assemble it for you
Brought inside to the room you choose
Assembled and set up by our crew
Packaging taken away
Choose Inside Delivery & Assembly as your delivery option at checkout.
How assembly works
1. What are the exact dimensions and footprint of this leg extension machine?
The machine measures 65 inches front to back, 42 inches wide, and 58 inches high, with a 19 square foot footprint. Allowing extra space around the machine is suggested for comfortable use and movement.
2. How much weight does the selectorized stack provide and what type of resistance does it use?
It uses a 300 lb pin-select weight stack for resistance, offering smooth, consistent tension throughout the full extension arc.
3. Which muscles does this machine target and what makes its design joint-friendly?
It isolates the quadriceps and also works the hip flexors and tibialis anterior. The ergonomic seat angle reduces knee pressure by distributing forces more evenly across the patellar tendon.
4. How does this leg extension accommodate different users?
It features an adjustable backrest and pivoting ankle pad, allowing precise positioning for different leg lengths and user sizes.
5. What is the warranty on this new machine?
New BUILT Strength machines come with the manufacturer’s warranty. You can find details and options for extended coverage on our product guarantees page.
6. What delivery options are available for this machine?
We offer Driveway Freight Delivery or Inside Delivery & Assembly, with stairs quoted separately. The shipping calculator on the product page shows available options and costs for your location.
30-Day Returns & Exchanges
Buy with confidence. Every Build A Gym order includes a 30-day window to return or exchange, whether you want a different size, color or configuration. Return shipping is the customer's responsibility and a 15% restocking fee applies to preference returns; warranty and damage claims carry no restocking fee. Full details in our Returns, Exchange & Refund Policy.
The BUILT Strength Fractal Series Leg Extension isolates the quadriceps through a seated extension with an ergonomic seat angle engineered to reduce knee pressure - the seat geometry positions the hip and thigh in the correct relationship to the knee joint, distributing the extension forces more evenly across the patellar tendon and reducing shear stress under heavy loading. An adjustable backrest and pivoting ankle pad accommodate different leg lengths for precise positioning before every set.
A 300 lb selectorized stack supports bilateral and unilateral leg extensions with smooth, consistent tension through the full extension arc. A 636 lb heavy-duty commercial steel frame delivers the structural stability and longevity for sustained professional quad isolation training. New.
Primary muscles targeted
Rectus Femoris Vastus Lateralis Vastus Medialis Vastus Intermedius
Secondary muscles
Hip Flexors Tibialis Anterior
Key features
Ergonomic Seat Angle - Reduced Knee Pressure
The seat angle positions the hip and thigh correctly relative to the knee joint - distributing extension forces more evenly and reducing patellar tendon shear stress under heavy loading for joint-friendly quad isolation training.
Adjustable Backrest & Pivoting Ankle Pad
An adjustable backrest and pivoting ankle pad accommodate any leg length and preferred starting position - keeping the knee joint correctly aligned with the pivot axis for consistent quad loading across all user sizes.
Bilateral & Unilateral Extension
Both legs together for standard bilateral quad development, or single-leg unilateral work for addressing left-right strength imbalances - both options supported by the same 300 lb selectorized stack without any attachment change.
300 lb Stack · 636 lb Commercial Frame
A 300 lb selectorized stack covers light quad activation through serious progressive loading. The 636 lb commercial-grade steel frame provides the structural stability for sustained high-frequency professional quad isolation training.
Specifications
Dimensions (L × W × H)
65" × 42" × 58"
Machine Weight
636 lb
Weight Stack
300 lb
Pin-select selectorized
Condition
New
Fractal Series · BUILT Strength
Design & Adjustability
Ergonomic Seat Angle · Adj. Backrest & Pivot Pad
Joint-friendly seat angle · Adjustable backrest & pivoting ankle pad · Bilateral & unilateral · 300 lb selectorized
Frame
11-Gauge (3mm) Steel
PDF
Assembly manual
BUILT Strength Fractal Series Leg Extension
The step-by-step factory guide for putting this machine together. Handy to look over before delivery day.
View manual
Download PDF
Rather not build it?
We will assemble it for you
Brought inside to the room you choose
Assembled and set up by our crew
Packaging taken away
Choose Inside Delivery & Assembly as your delivery option at checkout.
How assembly works
1. What are the exact dimensions and footprint of this leg extension machine?
The machine measures 65 inches front to back, 42 inches wide, and 58 inches high, with a 19 square foot footprint. Allowing extra space around the machine is suggested for comfortable use and movement.
2. How much weight does the selectorized stack provide and what type of resistance does it use?
It uses a 300 lb pin-select weight stack for resistance, offering smooth, consistent tension throughout the full extension arc.
3. Which muscles does this machine target and what makes its design joint-friendly?
It isolates the quadriceps and also works the hip flexors and tibialis anterior. The ergonomic seat angle reduces knee pressure by distributing forces more evenly across the patellar tendon.
4. How does this leg extension accommodate different users?
It features an adjustable backrest and pivoting ankle pad, allowing precise positioning for different leg lengths and user sizes.
5. What is the warranty on this new machine?
New BUILT Strength machines come with the manufacturer’s warranty. You can find details and options for extended coverage on our product guarantees page.
6. What delivery options are available for this machine?
We offer Driveway Freight Delivery or Inside Delivery & Assembly, with stairs quoted separately. The shipping calculator on the product page shows available options and costs for your location.
30-Day Returns & Exchanges
Buy with confidence. Every Build A Gym order includes a 30-day window to return or exchange, whether you want a different size, color or configuration. Return shipping is the customer's responsibility and a 15% restocking fee applies to preference returns; warranty and damage claims carry no restocking fee. Full details in our Returns, Exchange & Refund Policy.
Save 5%
Complete the room
The machines our install crew puts in the same room as this one - priced as one shipment, delivered in one booking.
$3,495.00
This machine
Bundle total
- Items
- $6,065.00
- Bundle price
- $5,761.75
- Estimated bundle saving
- −$303.25
- Everything arrives by
- Nov 13
One freight booking, one delivery window, one crew. Inside Delivery & Assembly available on the whole bundle.