What Is It
The Wheels Manufacturing Hanger 157 is a precision CNC-machined replacement derailleur hanger designed for selected Giant road and fitness bikes. It replaces damaged or bent OEM hangers and restores proper derailleur alignment and shifting performance. It replaces Giant part number RE4UD.
Key Features
- CNC-machined from 6061 aluminum
- Black anodized finish for corrosion resistance
- Designed as a direct replacement for Giant RE4UD hanger
- Includes mounting hardware (2x M4x8 screws) on most retail packages
- Stiffer than many stock OEM hangers for improved shifting precision
- Made in the USA by Wheels Manufacturing
- Exact-fit replacement for selected Giant and Liv models
Specifications
| Attribute |
Details |
| Product Type |
Rear derailleur hanger |
| Manufacturer |
Wheels Manufacturing |
| Model |
Hanger 157 / DROPOUT-157 |
| Material |
CNC-machined 6061 aluminum |
| Finish |
Black anodized |
| Mounting Style |
2-bolt attachment |
| Compatible Brand |
Giant / Liv |
| OEM Replacement |
Giant RE4UD |
| Included Hardware |
2x M4x8 flat-head screws |
| Country of Manufacture |
USA |
Compatible Bike Models
The hanger fits several older Giant and Liv models including:
- Giant TCR Advanced / Composite
- Giant Defy Advanced
- Giant Avail Advanced
- Giant TCX Advanced SL
- Giant Escape RX
- Giant Rapid
- Liv Avail Composite
Compatibility varies heavily by year and frame version, so matching the hanger shape exactly is critical.
Pros
- High-quality machining and durability
- More rigid than many OEM hangers
- Excellent shifting alignment accuracy
- Widely trusted aftermarket hanger brand
- Hardware usually included
- Easier to source than some discontinued Giant OEM hangers
- Strong reputation among mechanics and riders
Cons
- Must match the exact frame model and year
- Not universal between Giant bikes
- More expensive than some generic hangers
- Bike manufacturers sometimes changed hanger designs mid-production
- Incorrect matching can cause poor shifting or frame issues
Who Is It Suitable For
- Giant road bike owners needing hanger replacement
- Riders with bent or broken derailleur hangers
- Cyclists wanting stronger aftermarket replacements
- Mechanics servicing older Giant road bikes
- Riders wanting a spare hanger for emergencies
Who Should Use It
- Cyclists with compatible Giant or Liv frames
- Riders prioritizing precise shifting performance
- Riders who travel or race and want backup hangers
- Anyone replacing a damaged Giant RE4UD hanger
Bottom Line
The Wheels Manufacturing Hanger 157 is a premium aftermarket derailleur hanger offering excellent machining quality, reliable fitment, and improved stiffness compared to many stock hangers. It is a strong choice for compatible Giant and Liv bikes, especially for riders who want dependable shifting performance and a durable replacement solution. The biggest factor is ensuring exact compatibility with your specific bike model and year before purchasing.
