e*thirteen Sidekick Rear Hub - 32H, Boost 148mm, Microspline

The e*thirteen Sidekick Rear Hub is the only hub that simultaneously eliminates pedal kickback, delivers near-zero freewheeling drag, and runs near-silently when coasting. Built for trail, all-mountain, enduro, and E-MTB riders, the Sidekick unlocks a massive performance advantage by fully decoupling the drivetrain from the rear suspension during coasting.

The heart of the hub is a pusher-activated magnetic pawl mechanism that retracts completely when you stop pedaling. The result is a rear end that moves freely through its travel without fighting chain tension. This leads to significantly better small-bump compliance and more traction on rough terrain. In fact, BYB Telemetry testing shows up to 44% more time spent in the optimal suspension travel range compared to traditional hubs.

This model features a 32-hole drilling for increased wheel strength and a Shimano Microspline driver for Boost 148mm spacing. It includes a tool-free adjustable deadband, allowing you to switch between 9°, 13°, or 18° trailside in seconds. Use the 9° setting for fast, direct engagement during climbs, or open it up to 13° or 18° to maximize anti-kickback performance on technical descents. The 17mm 7075 alloy axle provides 50% more stiffness than previous generations while maintaining a competitive weight of just 300g.

Fully E-MTB compatible, the Sidekick reduces drivetrain clatter from motor torque pulses and is ASTM 5 rated for the most aggressive riding. It is backed by a 10-year warranty with lifetime bearing coverage and is fully rebuildable for extended service life.

Key Features

• Eliminate Pedal Kickback: Full drivetrain isolation allows suspension to work exactly as designed


• Near-Zero Drag: At least 55% less coasting drag than competing high-end hubs


• Near-Silent Operation: Hear your tires and the terrain instead of a loud freehub


• Tool-Free Deadband Adjustment: 9° / 13° / 18° settings to balance climbing speed and descending plushness


• Stiff & Lightweight: 17mm alloy axle delivers 50% more stiffness at a 300g weight


• E-MTB Compatible: ASTM 5 rated to handle high-torque motor applications

Specifications

• Model: e*thirteen Sidekick Rear Hub - 32H, Boost 148mm, Microspline


• Axle Spacing: Boost 148x12mm


• Freehub Body: Shimano Microspline


• Drilling: 32-hole


• Engagement: 3-Pawl with adjustable deadband (9°/13°/18°)


• Brake Mount: 6-Bolt


• Spoke Type: J-Bend


• Weight: 300g


• Warranty: 10-year warranty with lifetime bearing coverage

The e*thirteen Sidekick Rear Hub - 32H, Boost 148mm, Microspline is a maximum-traction rear hub built for riders who demand the highest braking grip, terrain compliance, and control on the roughest Enduro, DH, and E-MTB terrain.