Shimano SM-HB20 Center Lock Rotor Lockring External Spline 15/20mm Thru Axle 21g

Product Overview:

Secure your Center Lock disc brake rotors with the genuine Shimano SM-HB20 lockring.

Designed with an external spline (serration), this lockring is specifically engineered for hubs with oversized axles (15mm or 20mm thru-axles) where a standard internal cassette tool cannot fit.

Lightweight and durable, it provides reliable braking performance for your mountain, road, or gravel bike.

Specifications:

• Brand: Shimano

• Model: SM-HB20

• Type: Center Lock Rotor Lockring

• Tool Interface: External Spline (Requires a standard 44mm 16-notch Bottom Bracket tool, e.g., Shimano TL-FC32, TL-FC36)

• Material: Aluminum Alloy / Steel

• Color: Black

• Weight: Approx. 21g

• Recommended Torque: 40 N-m

Features:

• Genuine Shimano replacement component for optimal fit and durability.

• External serration design accommodates larger thru-axles.

• Printed with "SHIMANO" and "LOCK 40N-m" torque indicators.

• Precision engineering ensures your rotor stays tightly secured under heavy braking.

Compatibility:

• Fits standard Shimano Center Lock brake rotors.

• Designed primarily for front and rear hubs with 15mm or 20mm Thru-Axles (E-Thru).

• Backwards compatible: Can also be used on 12mm thru-axle and Quick Release (QR) hubs if you prefer using a bottom bracket tool for installation.

• • Important Note: This lockring CANNOT be installed using a standard cassette lockring tool. You MUST use an outboard bottom bracket tool.

  Package Includes:

  • 1 x Shimano SM-HB20 Center Lock Rotor Lockring (Bulk Packaging)

  (Note: Installation tools and brake rotors are NOT included)