SFE Commercial Leg Extension & Prone Leg Curl Combo with 250lb Weight Stack

Heavy-Duty 11-Gauge Structural Steel Dual-Function Lower Body Station, Adjustable Range-of-Motion Cam, Variable Roller Pad Settings, and Air-Cooled Protective Weight Shrouds

Develop powerful, sculpted quadriceps and deep, thick hamstrings with the institutional-grade performance of the SFE Commercial Leg Extension & Prone Leg Curl Combo. Custom-engineered to maximize training efficiency while saving valuable gym floor space, this dual-function machine houses two essential lower-body movements inside one rugged frame. By switching from an upright seated leg extension to a flat, prone leg curl in seconds, it lets athletes target their entire lower-body anatomy with total mechanical precision.

The structural foundation is fabricated from heavy-duty 11-gauge structural steel tubing, protected by a scratch-resistant matte black electrostatic powder-coat finish. Tucked securely behind sleek, high-impact weight shrouds, the single selectorized 250lb solid-steel weight stack glides silently on precision-ground guide shafts. Using high-tensile, self-lubricating military-grade steel-core cables and friction-free commercial pulleys, the machine balances heavy resistance capacity with an incredibly smooth, joint-friendly range of motion.

Key Product Features & Core Engineering

• Two-In-One Lower Body Station: Seamlessly transition between seated leg extensions (isolating the quadriceps) and prone leg curls (targeting the hamstrings) on a single compact chassis.

• Solid-Steel 250lb Selectorized Stack: Equipped with a single, heavy-duty 250lb weight stack featuring a magnetic-latching selector pin to handle heavy, high-capacity lower-body training.

• Adjustable Range-of-Motion Cam: Features an intuitive, multi-position adjustment dial to easily customize starting angles, protecting user joints and accommodating differing flexibility levels.

• Heavy-Duty 11-Gauge Steel Frame: Fabricated using industrial-grade structural steel tubing ($50\text{mm}\times 100\text{mm}\times 3\text{mm}$) to guarantee total frame stability under heavy workloads.

• Self-Aligning Ankle Roller Pad: The padded lower roller automatically adjusts to individual leg lengths, ensuring consistent pressure and safe biomechanics throughout the full extension or curl.

• High-Density Sweat-Proof Cushioning: Ergonmically contoured bench pads are stuffed with thick, PAHs-certified non-toxic foam covered in double-stitched, sweat-proof composite leather.

Technical Specifications Summary

Comprehensive Product Packaging List

• 1 × SFE Commercial Leg Extension & Prone Leg Curl Combo Main Frame and Tower Assembly

• 1 × Selectorized 250lb Solid-Steel Weight Stack Block (With Internal Guide Rods & Magnetic Pins)

• 1 × High-Density Contour Bench Seat, Backrest, and Thigh Support Pad Assembly

• 1 × Adjustable Ankle Roller Pad Assembly with Telescoping Dial

• 1 × Master Bolt Pack, Heavy-Duty Washers, Frame Brackets, and Structural Installation Manuals

Critical Field Installation & Operational Guidelines

• Level Base Alignment: Assemble the combo machine on a completely flat, level surface. If building it on gym tile or garage concrete, lay down high-density rubber protective tiles first. Hand-tighten all joint brackets until the frame is fully upright and square, then tighten all structural bolts down—this prevents frame twisting and guarantees smooth weight stack alignment.

• Guide Rod Maintenance Routine: Keep the twin solid-chrome guide rods completely clean of sweat, dust, and gym chalk. Wipe them down once a month with a dry microfibre towel, then apply a thin layer of 100% dry silicone spray lubricant. Avoid using sticky, wet greases or WD-40, which can trap abrasive dirt and slow down the weight plates.

• Ankle Roller Calibration: Before initiating your workout, adjust the ankle roller length to rest comfortably just above your shoe line. When switching from extensions to curls, use the central pull-pin dial to reposition the pivot arm, ensuring the cable maintains its mechanical advantages and pulls smoothly without dragging.