Bicycle Derailleur
This bicycle derailleur is designed for 18/21 or 15/18 speed index systems and features bracket installation. It is suitable for double, triple, or quadruple chainwheel systems and offers a capacity of 14T or 22T.




Technical Specifications
Product Overview
High-Performance Bicycle Drivetrain Components
This collection of bicycle derailleurs includes both rear and front shifting mechanisms designed for durability and smooth operation. Engineered for various speed systems and chainwheel configurations, these components feature robust steel construction and versatile installation options to suit a wide range of bicycle frames. Whether for indexed or friction shifting, these derailleurs provide reliable performance for multi-speed drivetrain setups.
Rear Derailleurs
Specifications Table
| Model | Speed System | Total Capacity |
|---|---|---|
| QLB-23 | 18/21 Speed | 43T |
| QLB-21 | 18/21 Speed | 43T |
| QLB-18 | 18/21 Speed | 43T |
| QLB-15 | 15/18 Speed | 36T |
- Available Models
- QLB-23QLB-21QLB-18QLB-15
- Cage Type
- Long cage
Front Derailleurs
Key Metrics
Compatibility & Installation
- Clamp diameters: 1-1/8", 1-1/4" (28.6mm, 31.8mm)
- Pull types: Top-pull, Down-pull, or Dual-pull
- Chainwheel systems: Double, Triple, or Quadruple
- Available Models
- QLD-07QLD-03QLD-03AQLD-01QLD-01AQLD-08



