Product Description

Precision-Engineered for SRM PM9 Cranks

Designed exclusively for SRM PM9 power meter cranksets, this titanium crank cap is available as a single replacement or upgrade component for either the Drive Side (DS) or Non-Drive Side (NDS).

Unlike the original crank caps, which share a very similar design despite significantly different torque requirements, the S-PARTS version optimizes each side independently to achieve the ideal balance between strength and weight.

Whether you're replacing a damaged cap or upgrading your drivetrain with premium titanium components, simply choose the side you need.

Drive Side vs Non-Drive Side

Drive Side Crank Cap

According to SRM specifications, the Drive Side cap requires a tightening torque of 40Nm.

To ensure maximum reliability, the Drive Side version features a reinforced internal structure designed to withstand repeated installation and removal while maintaining thread integrity.

Specifications:

• Weight: 9.58g
• Tightening Torque: 40Nm
• Reinforced high-strength design
• Optimized for long-term durability

Non-Drive Side Crank Cap

The Non-Drive Side cap requires only 5Nm of tightening torque.

To eliminate unnecessary material, extensive CNC pocketing has been incorporated into the inner structure and thread base. This allows significant weight reduction while maintaining the strength required for normal operation.

Specifications:

• Weight: 6.14g
• Tightening Torque: 5Nm
• Aggressive CNC pocketing design
• Reduced overall weight while maintaining structural integrity

Specifications

Compatibility:

• SRM PM9 Power Meter Cranks

Material:

• Grade 5 Titanium (Ti-6Al-4V)

Available Colors:

• Gold
• Oil Slick (Rainbow)
• Raw Titanium
• Black
• Blue
• Green
• Purple
• Candy Color
• Indigo

Package Includes:

• 1 × Titanium Crank Cap

🚨 PLEASE NOTE:

This product contains ONE (1) single crank cap, not a set.

Drive Side and Non-Drive Side caps are sold separately. Please select the required side before purchasing.

Aerospace-Grade Grade 5 Titanium

Manufactured from premium Grade 5 Titanium (Ti-6Al-4V), a material widely trusted in aerospace, motorsport, and high-performance cycling applications.

Benefits include:

• Exceptional strength-to-weight ratio
• Outstanding corrosion resistance
• Excellent fatigue resistance
• Approximately 45% lighter than steel
• Long-term durability in demanding riding conditions

S-PARTS selects only high-quality titanium materials that consistently achieve an average tensile strength exceeding 1050MPa.

Precision CNC Manufacturing

Each crank cap is CNC machined from solid titanium billet using high-precision equipment.

Strict tolerance control ensures:

• Accurate thread engagement
• Smooth installation and removal
• Reliable torque retention
• Consistent long-term performance

Premium Surface Finishes

PVD Vacuum Coated Finishes

• Gold
• Oil Slick (Rainbow)
• Black
• Blue

These finishes utilize advanced PVD vacuum coating technology to create a dense, wear-resistant surface layer with excellent color durability.

Anodized Finishes

• Green
• Purple
• Candy Color
• Indigo

Controlled anodizing creates vivid colors through light interference within the oxide layer, producing brilliant metallic finishes without pigments or dyes.

Raw Titanium Finish

• Raw Titanium

The natural titanium finish showcases the authentic metallic appearance of Grade 5 Titanium without additional color treatment.