Parcel ground shipping
Items weighing 149 lb or less ship by ground parcel rather than freight.

Parts & Labor, Fully Rebuilt
Remanufactured to full mechanical spec, covered from the day it lands.
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Delivery options
Your item’s shipping method and price are confirmed in the shipping calculator and at checkout. Here is what each delivery path means.
Items weighing 149 lb or less ship by ground parcel rather than freight.
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.
When selected and available for your address, the delivery team brings the equipment into the room, assembles and tests it, then removes the packaging.
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.
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.
Coverage and accessories have to go on the same booking as the machine. Add them here and they travel together.
Commercial-grade equipment, inspected and supported by warranty.
The Nautilus Nitro Leg Extension is designed to deliver precise, effective quadriceps training with biomechanics that support full knee extension and optimal muscle contraction. Engineered to maintain proper axis alignment throughout the movement, this selectorized machine allows users to achieve a maximum range of motion while reducing unnecessary joint stress.
Classic full-range variable resistance cams provide smooth, consistent loading from start to finish, ensuring strong quad engagement through every repetition. A quick-set leg pad makes it easy to achieve proper positioning for users of all sizes, while the heavily padded movement arm roller and traditional seat pads enhance comfort during training. Ergo Grip® handles offer added stability and control throughout the exercise.
Built with durable 2" × 4" steel frame construction, the Nitro Leg Extension is made to withstand high-use commercial environments. The partially shielded weight stack features 5 lb increments, allowing for quick, convenient resistance changes without interrupting workout flow.
Specifications & Features
Selectorized leg extension machine
Designed for full knee extension and maximum quadriceps contraction
Maintains proper axis alignment throughout the movement
Classic variable resistance cams for smooth, consistent loading
Quick-set leg pad for fast, accurate user positioning
Heavily padded movement arm roller for enhanced comfort
Traditional seat pads for familiar, supportive feel
Ergo Grip® handles for stability during exercise
Partially shielded weight stack with 5 lb increments
Heavy-duty 2" × 4" steel frame construction
Weight stack: 245 lbs
Dimensions (L × W × H): 55" × 36" × 54"
Machine weight: 557 lbs
1. Which selectorized lower-body machines are essential?
Leg extension, leg curl, and seated leg press are are top sellers and most common in gyms.
2. How do I adjust range of motion?
Most machines have adjustable backrests and pivot points; use numbered markers for consistency.
3. Do they require floor mounting?
Not required, but it never hurts; ensure a level surface and clear 3′ around the machine.
4. What financing options exist?
Same 0% APR financing available for all selectorized machines via Shop Pay.
5. Are replacement parts available?
Yes—Build A Gym stocks common cables, pulleys, and bushings for quick maintenance.
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 Nautilus Nitro Leg Extension is designed to deliver precise, effective quadriceps training with biomechanics that support full knee extension and optimal muscle contraction. Engineered to maintain proper axis alignment throughout the movement, this selectorized machine allows users to achieve a maximum range of motion while reducing unnecessary joint stress.
Classic full-range variable resistance cams provide smooth, consistent loading from start to finish, ensuring strong quad engagement through every repetition. A quick-set leg pad makes it easy to achieve proper positioning for users of all sizes, while the heavily padded movement arm roller and traditional seat pads enhance comfort during training. Ergo Grip® handles offer added stability and control throughout the exercise.
Built with durable 2" × 4" steel frame construction, the Nitro Leg Extension is made to withstand high-use commercial environments. The partially shielded weight stack features 5 lb increments, allowing for quick, convenient resistance changes without interrupting workout flow.
Specifications & Features
Selectorized leg extension machine
Designed for full knee extension and maximum quadriceps contraction
Maintains proper axis alignment throughout the movement
Classic variable resistance cams for smooth, consistent loading
Quick-set leg pad for fast, accurate user positioning
Heavily padded movement arm roller for enhanced comfort
Traditional seat pads for familiar, supportive feel
Ergo Grip® handles for stability during exercise
Partially shielded weight stack with 5 lb increments
Heavy-duty 2" × 4" steel frame construction
Weight stack: 245 lbs
Dimensions (L × W × H): 55" × 36" × 54"
Machine weight: 557 lbs
1. Which selectorized lower-body machines are essential?
Leg extension, leg curl, and seated leg press are are top sellers and most common in gyms.
2. How do I adjust range of motion?
Most machines have adjustable backrests and pivot points; use numbered markers for consistency.
3. Do they require floor mounting?
Not required, but it never hurts; ensure a level surface and clear 3′ around the machine.
4. What financing options exist?
Same 0% APR financing available for all selectorized machines via Shop Pay.
5. Are replacement parts available?
Yes—Build A Gym stocks common cables, pulleys, and bushings for quick maintenance.
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 machines our install crew puts in the same room as this one - priced as one shipment, delivered in one booking.
$2,495.00
This machine