S-PARTS
M5 Titanium Caliper Bolts for Shimano Flat Mount - R9270 / R8170 / R8070 / R7170
M5 Titanium Caliper Bolts for Shimano Flat Mount - R9270 / R8170 / R8070 / R7170
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Short Description
High-performance Grade 5 titanium bolts engineered for Shimano flat-mount road systems. Precision-machined for significant weight reduction and uncompromising clamping security across all riding conditions.
🔧Product Description
The S-PARTS M5 Titanium Caliper Bolts are the ultimate hardware upgrade for performance-driven road cyclists. Specifically designed for the Shimano Flat Mount standard (including Dura-Ace R9270 and Ultegra R8170/R8070), these bolts replace heavy standard OEM hardware with aerospace-grade Ti-6Al-4V.
S-PARTS combines technical precision with cycling aesthetics, ensuring your calipers stay perfectly aligned while adding a premium, custom finish to your build.
📋 Specifications
- Material: Aerospace-Grade Ti-6Al-4V (Grade 5 Titanium)
- Thread Size: M5
- Lengths: 16 / 20 / 25 / 30 / 35 / 40 / 45 mm
- Head Diameter: 11mm
- Tool Interface: T25 Torx (High-torque engagement)
- Mount Standard: Flat Mount Disc Brake
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Finishes: Anodized & PVD (depending on color)
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SN: 28090101-28090110, 28090201-28090210, 28090301-28090310, 28090401-28090410, 28090501-28090510,28090601-28090610, 28090701-28090710
- Notice: Some screws may have 'white lines' on the threads, which is a normal result of the coloring process. Rest assured, they are safe to use.
| Head Height | Length | Weight |
| 4.5mm | 16mm | 1.8g |
| 4.5mm | 20mm | 2.05g |
| 4.5mm | 25mm | 2.4g |
| 4.5mm | 30mm | 2.75g |
| 4.5mm | 35mm | 3.05g |
| 4.5mm | 40mm | 3.35g |
| 4.5mm | 45mm | 3.35g |
✨ Advanced Surface Craftsmanship

To achieve vibrant aesthetics and long-term durability, we utilize two distinct high-end coloring processes:
- PVD Vacuum Nitriding (Gold / Black / Blue / Rainbow): A molecular-level coating process that creates an ultra-hard, scratch-resistant surface with a high-gloss finish.
- Anodic Oxidation (Purple / Green / Candy / Indigo): An electrolytic process that produces rich, saturated hues while preserving the natural metallic texture of the titanium.
🚀 Why S-PARTS Titanium?

- Significant Weight Reduction: Substantially lighter than standard OEM steel bolts (exact weight savings vary by bolt length).
- Extreme Fatigue Resistance: Designed to withstand repeated thermal expansion and vibration under heavy braking loads.
- T25 Torx Drive: Features a precision T25 interface for superior tool engagement, significantly reducing the risk of bolt stripping compared to standard hex drives.
- All-Weather Durability: Naturally 100% rust-proof and resistant to road salt, sweat, and corrosion.
🔩 Compatibility & Fitmen
- Shimano Road: R9270, R8170, R8070, R7170, R7070.
- Other Systems: Compatible with any Flat Mount caliper or adapter requiring M5 mounting bolts.
- Important: Please measure your frame or fork thickness carefully. Ensure the bolt length provides sufficient thread engagement according to your frame manufacturer's requirements.
💡 Pro Tip
Always use a calibrated torque wrench for installation to ensure safety and performance. Please follow the official torque specifications provided by Shimano and your frame manufacturer for your specific setup (commonly around 6-8 Nm depending on application). We recommend applying a small amount of anti-seize or assembly paste to the threads before installation.
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