21Speed Hook Type Rear Derailleur MTB 7 Speed Gear Shifter Claw Mount Hanger with Pulley Wheels Claw Mountain Bicycle Derailleur

1 Speed Rear Derailleur - Hook Type Claw Mount with Pulley Wheels for MTB, City & Commuter Bikes

21 Speed Drivetrain Compatibility: Engineered for 21-speed systems (3 x 7), this 7-speed rear derailleur shifts smoothly and precisely across the full gear range. The perfect match for city bikes, entry-level MTBs, and family bikes running standard 21-speed drivetrains - a direct-fit upgrade or replacement with no modifications needed.

Hook Type Claw Mount - Simple Frame Attachment: The hook-style mounting arm clamps directly onto the frame hanger without extra adapters or hanger replacements. This classic claw-mount design suits older and budget frames, installing in minutes with basic tools - ideal for repair shops servicing everyday bikes.

Smooth Shifting with Dual Pulley Wheels: A red guide pulley with lightweight cutouts and a matching tension pulley keep chain movement fluid and stable through every shift. Crisp, reliable gear changes under load, with reduced chain slap and noise on rough roads and trails.

Precise Tuning with H/L Limit Screws: High and Low limit screws let you set the exact travel range of the derailleur, preventing the chain from overshooting the largest or smallest sprocket. Get perfect indexing in minutes - even for first-time installers.

Tool-Free Cable Tension Adjuster: The knurled barrel adjuster allows quick, on-the-bike cable tension fine-tuning. Dial in crisp shifting without loosening cables or carrying extra tools - a practical detail for riders and workshop technicians alike.

Factory-Direct Wholesale Value: A high-turnover replacement part with steady global demand for bike shops, distributors, and parts traders. Stable quality, competitive pricing, and consistent supply for repeat orders and mixed-container programs.