TOOPRE TC4 Titanium Alloy Rear Derailleur Pulley Screws – M5x14.2mm Lightweight Guide & Tension Wheel Fixing Bolts with PVD Vacuum Coating for MTB and Road Bike Shifting Systems
The TOOPRE Titanium Alloy Rear Derailleur Pulley Screw Kit is an elite-grade component upgrade engineered specifically for performance-driven mountain (MTB) and road cyclists. Forged from high-integrity TC4 (Grade 5) titanium rods, these M5x14.2mm fastening bolts replace heavy stock factory screws to reduce rotational weight on the rear derailleur cage assembly. Each individual screw weighs an astonishingly low 1.09 to 1.15 grams while delivering superior structural tensile strength. Enhanced with a protective PVD vacuum coating or high-finish polishing, they guarantee immunity against weather corrosion, trail grime, and premature wear. Packaged in a premium presentation tin, this kit provides a refined mechanical upgrade that improves both shifting stability and rear drivetrain aesthetics.
Descriptions
Elite-Grade TC4 Titanium Construction
The foundation of the TOOPRE Derailleur Pulley Screws relies on premium TC4 (GR5) titanium rods. Unlike lower-tier components that utilize secondary smelting or recycled alloys, these screws are milled from virgin titanium stock. This ensures an exceptional strength-to-weight ratio, allowing the fastener to withstand the constant vibration and lateral forces exerted on guide and tension jockey wheels during high-frequency shifting changes.
Ultra-Lightweight Weight Reduction Protocol
Every gram matters when optimizing high-performance bicycle drivetrains. By replacing standard steel pulley bolts with the TOOPRE titanium alternative, riders can reduce unnecessary mass at the lowest point of the shifting mechanism. Weighing only about 1.15g per piece (with a bare net core of 1.09g), these screws offer a massive weight reduction over stock hardware without sacrificing torque handling limits or structural safety.
PVD Vacuum Coating For Longevity
To protect against the corrosive nature of chain lubricants, degreasers, road salt, and environmental moisture, the colored variants undergo a highly specialized Physical Vapor Deposition (PVD) vacuum coating procedure. This process infuses composite layers (including TiN and TiAlCN) onto the titanium surface, forming a hard exterior shell. It resists fading, scratching, and oxidation, ensuring your drivetrain accents look pristine for thousands of miles.
Precision CNC Machining & Thread Rolling
TOOPRE applies exacting manufacturing tolerances to ensure absolute mechanical engagement. The threads are fully formed using an automatic thread rolling machine rather than traditional cutting tools, yielding dense grain structures and a tight thread pitch. This treatment prevents striping or loose tolerances when torqued down. The screw heads feature a smoothed, rounded profile with clean hexagon socket depths to prevent tool slippage and rounded edges during installation.
Presentation-Grade Tin Packaging
Reflecting the premium quality of the components inside, each pair of TOOPRE Titanium Pulley Screws is delivered in a high-quality protective metal storage tin. The screws are securely seated inside customized slots cut into shock-absorbing EVA foam, preventing superficial rubbing or damage during transit and making it an exceptional presentation piece or gift for custom bike builders.
Product Specifications Table
| Technical Parameter | Specification Details |
|---|---|
| Brand | TOOPRE (Official Brand Authorization Available) |
| Product Name | Titanium Alloy Rear Derailleur Pulley Wheel Screws |
| Material Grade | TC4 / GR5 (Grade 5) Aerospace Titanium Alloy |
| Sizing Thread Specification | M5 x 14.2mm |
| Drive Interface | Precision Internal Hexagonal Socket (Hex Drive) |
| Net Weight Per Piece | Approximately 1.09g to 1.15g |
| Available Colorways | Colourful (Rainbow/Oilslick), Gold, Black, Raw Titanium |
| Surface Finishing Process | PVD Vacuum Coating & Micro-Mirror CNC Polishing |
| Thread Manufacturing | Automatic Thread Rolling Machine Core Treatment |
| Application Scope | Bicycle Drivetrain Rear Derailleur Guide and Tension Pulley Wheels |
| Packaging Configuration | Branded Metal Tin + High-Density EVA Protection Foam Inner Lining |
Drivetrain Integration & Installation Notes
- Universal Compatibility: Specially sized at M5x14.2mm, making them ideal replacements for most modern 11-tooth, 12-tooth, and oversized pulley wheel systems utilized by leading derailleur manufacturers.
- Dual-Pulley Security: Each kit contains the necessary matching screws to secure both the upper guide jockey wheel and the lower tension jockey wheel on a standard rear derailleur cage setup.
- Corrosion Immunity: Naturally resistant to sweat, rain, mud, and chemical washes, preventing rust-binding within the derailleur plate threads.
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