This 26" professional mountain bike features a 1.2M thickened iron frame paired with a 1.0M iron suspension fork, effortlessly conquering various terrains. With well-balanced configurations and outstanding performance:  

Key Features:  
✓ Reinforced Iron Frame - 1.2M extended design for enhanced load capacity  
✓ Professional Suspension - 1.0M iron fork for effective shock absorption  
✓ Precise Control System - 1.2M iron handlebar with plastic brake levers  
✓ 26" Large Wheels - Aluminum rims paired with anti-slip rubber tires  
✓ 21-Speed Transmission - 7S positioning freewheel for accurate gear shifting  
✓ Dual Disc Brakes - Front and rear disc brakes for responsive stopping  
✓ Three Color Options - Available in red, yellow, and green  

Product Advantages:  
▶ All-iron Main Structure - Frame, fork, and single stand made of iron  
▶ Professional Configuration - 21-speed transmission + dual disc brake system  
▶ Large Wheel Size - 26" wheels ideal for adult riders  
▶ Cost-Effective - Plastic pedals and other components for affordability  

Manufacturer Strengths:  
★ Direct Factory Supply - Competitive pricing  
★ 10 Years Production Experience - Quality guaranteed  
★ Bulk Customization Support - Color and specifications available  
★ Comprehensive After-Sales Service - Professional support provided