SRAM 900 QR Disc Brake Rear Hub

SRAM 900 QR Disc Brake Rear Hub is a high-performance rear hub engineered to deliver smooth rolling efficiency, rapid engagement, and exceptional durability for modern road and mountain bikes. Designed for riders seeking reliable performance across a variety of disciplines, this hub combines lightweight aluminum construction with SRAM's proven Double Time™ engagement technology for responsive power transfer and dependable operation.

At the heart of the hub is a durable four-pawl Double Time™ mechanism that provides quick engagement, allowing riders to accelerate efficiently and maintain control on technical terrain. High-quality sealed cartridge bearings ensure smooth rotation, reduced maintenance requirements, and long-lasting performance in challenging riding conditions.

The hub features optimized flange geometry with angled flanges for improved spoke alignment and wheel strength. Interchangeable axle end caps allow compatibility with multiple frame standards and can be swapped without tools, making the SRAM 900 hub a versatile solution for wheel builds and drivetrain upgrades.

Compatible with SRAM XDR cassettes and supplied with a 1.8mm spacer, this rear hub is suitable for performance road, gravel, cyclocross, and mountain bike applications.

Key Features

• Hub Type: Rear Disc Brake Hub

• Brake Compatibility: 6-Bolt Disc Brake

• Freehub Standard: SRAM XDR

• Engagement System: Double Time™ Four Pawl Mechanism

• Bearing Type: Sealed Cartridge Bearings

• Axle Standard: 9/10mm Quick Release (QR)

• Wheel Compatibility: Road And Mountain Bikes

• Spoke Interface: J-Bend Spokes

• Construction: Lightweight Aluminum Body

Product Specifications

• Brand: SRAM

• Model: 900 QR Disc Brake Rear Hub

• Brake Type: 6-Bolt Disc Brake

• Speed Compatibility: 11 Speed

• Axle Type: 9/10mm QR

• O.L.D (Over Locknut Dimension): 135mm

• Freehub Body: SRAM XDR

• Flange Diameter: 60mm (Left), 58mm (Right)

• Flange Distance: 20.5mm, 34.25mm

• Spoke Type: J-Bend

• Bearing Type: Sealed Cartridge Bearings

• Material: Aluminum

• Approximate Weight: 275g

Performance & Hub Technology

• Double Time™ Engagement: Four-pawl mechanism delivers quick and reliable power transfer

• Sealed Bearings: Provide smooth rotation and excellent protection from contaminants

• Optimized Spoke Geometry: Angled flanges improve wheel strength and spoke alignment

• Fast Acceleration: Quick engagement enhances responsiveness on climbs and technical terrain

• Durable Construction: Built to withstand demanding road and off-road conditions

• Low Maintenance Design: Sealed bearing system promotes long-term reliability

Compatibility & Installation

• XDR Compatible: Designed for SRAM XDR cassette systems

• 1.8mm Spacer Included: Supports compatibility with specific cassette configurations

• Quick Release Axle: Compatible with 9/10mm QR frame standards

• Tool-Free End Caps: Easily swap end caps for alternate frame specifications

• 6-Bolt Rotor Mount: Compatible with standard 6-bolt disc brake rotors

• J-Bend Spoke Compatibility: Suitable for a wide range of wheel builds

Why Choose This Product

• Rapid Double Time™ Engagement: Delivers responsive pedaling performance

• Premium Sealed Bearings: Smooth operation and long service life

• Versatile Compatibility: Suitable for road, gravel, cyclocross, and MTB use

• Lightweight Aluminum Construction: Balances durability and performance

• Easy Adaptability: Tool-free end cap changes simplify setup

• Trusted SRAM Engineering: Built for reliability and consistent performance

In the Box

• 1 x SRAM 900 QR Disc Brake Rear Hub

• 1 x 1.8mm XDR Cassette Spacer

• Axle End Caps