Spirit Fitness SP-6507 Leg Extension

Product Overview

The Spirit Fitness SP-6507 Leg Extension is a premium plate-loaded strength machine engineered for precise quadriceps isolation with advanced biomechanics and heavy-duty performance. Featuring a counterbalanced lever arm and adjustable positioning, it ensures smooth movement, reduced starting resistance, and optimal knee alignment. Built for high-performance training environments, the SP-6507 delivers powerful lower-body development with stability, comfort, and durability.

PIN: SP-6507

Key Features

• Counterbalanced Lever Arm
  Reduces initial resistance, allowing smoother starts and improved control throughout the movement.
• Optimized Knee Alignment System
  Adjustable back pad ensures correct alignment with the machine’s axis of rotation for safe, effective training.
• Adjustable Tibia Pad
  Provides comfortable ankle positioning and accommodates different user sizes.
• Plate-Loaded Strength System
  Supports high load capacity for progressive overload and advanced strength development.
• Integrated Weight Storage
  Built-in plate horns keep weights organized and within easy reach.
• Smooth, Controlled Motion
  Engineered movement path ensures consistent resistance and reduced joint stress.
• Heavy-Duty Commercial Construction
  Reinforced steel frame provides stability and long-term durability in high-use facilities.

Specifications

Performance

• Exercise Type: Leg extension (plate-loaded)
• Resistance System: Plate-loaded with counterbalance
• Plate Arm Capacity: 125 kg / 276 lb
• Maximum Machine Load: 400 kg / 882 lb
• Movement: Lever-driven extension with optimized biomechanics
• Target Muscles: Quadriceps

Design & Build

• Frame: Heavy-duty commercial-grade steel
• Finish: Durable powder-coated surface
• Seat & Backrest: Adjustable for proper alignment
• Pads: Adjustable tibia pad for ergonomic positioning
• Mechanics: Counterbalanced lever system with natural motion path
• Structure: Wide, stable base with integrated plate storage

Dimensions & Capacity

• Dimensions (L × W × H): 1685 × 1670 × 1100 mm (66" × 66" × 43")
• Machine Weight: 139 kg / 306 lb
• Maximum User Weight: 150 kg / 330 lb
• Maximum Load Capacity: 400 kg / 882 lb
• Footprint: Plate-loaded design suited for premium strength zones