M4 x 16mm Titanium Rear Derailleur Adjustment Bolt for Shimano R8150 / R9250 Road Bikes

Description
Replace your stock rear derailleur adjustment bolt with this precision-machined M4 x 16mm titanium upgrade, compatible with Shimano R8150 and R9250 12-speed Di2 road groupsets. Designed to fine-tune your rear derailleur position, this bolt plays a critical role in shifting accuracy and drivetrain performance.

Crafted from Grade 5 Titanium (Ti-6Al-4V), it delivers exceptional corrosion resistance and high tensile strength at nearly half the weight of steel. Available in 9 vivid anodized and vacuum-coated colors, this bolt adds both performance and personality to your build.

Specifications:

• Material: Grade 5 Titanium (Ti-6Al-4V)
• Applicable Models: Shimano R8150/R9250
  
• Size: M4 x 16mm
• Head Diameter: 4mm
• Length: 16mm
• Quantity: 1 pc
  
• Weight: 0.55g
  
• Tool: 2mm Hex Key
• Color: Gold, Rainbow, Titanium, Black, Blue, Green, Purple, Candy, Indigo
• Fitment: Shimano Dura-Ace R9250 / Ultegra R8150 rear derailleurs (12-speed Di2)

Features:

• CNC-machined for precise fit and smooth threading
• Rustproof and fatigue-resistant — perfect for all-weather road cycling
• Compatible with Shimano R8150 12-speed Di2 rear derailleurs
• May also be suitable for R9250 models with matching thread and depth
• Available in 9 rich colors for aesthetic customization
• Weight-saving titanium upgrade without sacrificing strength

Note:

This is the adjustment bolt, not the tension bolt.
* Please verify with your original bolt dimensions.
👉 We recommend purchasing based on the actual size of your stock bolt (M4 x 16mm).