Spirit Fitness SP-4307 Biceps Curl

Product Overview

The Spirit Fitness SP-4307 Biceps Curl is a precision-engineered strength machine designed to deliver focused, isolated arm training with optimal biomechanics. Built to minimize shoulder involvement and maximize biceps activation, it features an ergonomic arm pad, adjustable seating, and a pivoting handle system that adapts to different users. With its smooth resistance, compact footprint, and commercial-grade durability, the SP-4307 provides consistent, safe, and effective performance for professional training environments.

PIN: SP-4307

Key Features

• Targeted Biceps Isolation
  Angled arm pad restricts shoulder movement, ensuring maximum focus on the biceps.
• Pivoting Curl Bar
  Automatically adjusts to different forearm lengths for proper alignment with the machine’s axis of rotation.
• Adjustable Seat Alignment
  Enables precise elbow positioning to maintain correct biomechanics for every user.
• Smooth Cable-Driven Resistance
  Provides fluid, controlled motion throughout the full range of movement.
• Integrated Rep Counter & Storage
  Tracks workout performance and offers convenient storage on the top cap.
• Compact, Space-Efficient Design
  Optimized footprint maximizes gym floor utilization without compromising functionality.
• Commercial-Grade Construction
  Built with heavy-duty steel and premium upholstery for long-term durability.

Specifications

Performance

• Exercise Type: Seated biceps curl
• Resistance System: Selectorized weight stack
• Weight Stack: 86 – 110 kg (190 – 240 lb, configuration dependent)
• Increment: 5 lb (2.2 kg) increments
• Pulley Ratio: Approx. 0.7
• Movement: Cable-driven system for smooth, controlled resistance
• Target Muscles: Biceps and forearms 

Design & Build

• Frame: Heavy-duty commercial-grade steel
• Finish: Electrostatic powder-coated, corrosion-resistant surface
• Arm Pad: Angled design for improved isolation and support
• Seat: Adjustable height for proper alignment
• Handles: Pivoting curl bar for ergonomic positioning
• Padding: High-density foam with durable upholstery
• Convenience Features: Rep counter, storage tray, enclosed weight stack 

Dimensions & Capacity

• Dimensions (L × W × H): 1255 × 1085 × 1500 mm (49" × 43" × 59")
• Machine Weight: Approx. 197 – 208 kg (434 – 458 lb)
• Weight Stack: 86 – 110 kg (190 – 240 lb)
• Maximum User Weight: Approx. 150 – 163 kg (330 – 360 lb range)
• User Height Range: Approx. 4’11” – 6’8”