Shimano XTR WH-M9220 Enduro / Trail Carbon 29-Inch Rear Wheel

WH-M9220 XTR lightweight Enduro /Trail Carbon wheel, designed to meet the pro criteria.

Built with the Enduro World Series racing and serviceability in mind, the WH-M9220 is Shimano’s beefiest full-carbon wheel offering yet. Equipped with a hookless 30mm carbon rim, all-new XTR hubs and traditional 28H stainless steel J-Bend spokes, the WH-M9220 is built to survive and easy to repair if things go wrong.

Technology

Direct Engagement

A direct engagement system was developed to increase drive rigidity. Compared to the conventional Pawl Ratchet structure, the contact area is increased, and ratchets are more firmly fitted to each other while being driven due to the spiral shape. These have led to a substantial improvement of drive rigidity.

Furthermore, Shimano have succeeded in reducing the weight of the entire hub by making the freehub body and main components of the ratchet from aluminium.

Shimano have succeeded in significantly improving drive rigidity by using a hub that incorporates a direct engagement system.

MicroSpline

MicroSpline delivers lightweight aluminium freehub body to reduce weight and 10 teeth top gear. Use combination with MicroSpline cassette and freehub.

Benefits & Features:

• Lightweight aluminium MicroSpline freehub seamlessly integrates with small 10-tooth top gears
• Smaller and more widely distributed splines limit cog damage on lightweight aluminium freehub

CentreLock

The CentreLock system makes an easy rotor installation possible with spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency.

• Light weight
• CentreLock compatible hub has only spline mount and a lock ring. This means the lightweight of hub and rotor compared to 6-bolt mount system
• Lock ring rotor mounting system
• Allows easier and faster rotor installation. Easy maintenance
• Secure fixing by spline mount
• Improves braking efficiency

E-Thru

The tool-less type thru-axle skewer system optimises rigidity and weight balance and enables easy operation with a reliable internal cam mechanism. The 15mm thru-axle system is 15% stiffer torsionally and 25% stiffer in transverse shear than a traditional 9mm quick release front axle system. High rigidity is secured while keeping the optimum weight balance. The E-Thru axle hub system minimizes the distortion of suspension while maintaining lightweight for riding around sharp corners at high speed.

• 15mm E-Thru axle system
• Satisfies both smooth rotation and high rigidity for excellent bike control
• Almost same stiffness as 20mm system
• Lighter than 20mm thru-axle hub

Features

• These wheels are lightweight, strong and durable with a tubeless compatible, 4mm thick hookless carbon 30mm internal rims
• 28 durable stainless steel spokes
• Alloy 12-Speed MicroSpline freehub body with quick pawl engagement (3.5 deg) provides instant power transfer
• Stainless steel cartridge bearing with pre-load adjust for optimising sealing and ease of maintenance
• Wide bearing placement gives excellent lateral rigidity further improving strength and durability
• Forged then anodised alloy hub shell for maximum strength and long lasting good looks
• Easy to use CentreLock Disc Rotor mount
• Aluminium axle
• For 148 x 12mm dropouts
• For use with 12-Speed HyperGlide+ cassette sprockets