e*thirteen Sidekick GR Rear MTB Hub – Boost 148mm, Microspline, 32H

The Sidekick Hub is a revolutionary milestone in MTB wheel technology. Developed and tested with elite World Cup teams, it enhances the suspension performance of any full‑suspension bike by virtually eliminating pedal kickback, reducing drag, and delivering near‑silent coasting. Its adjustable deadband allows riders to fine‑tune engagement and suspension feel to match terrain and riding style.

Key Performance Features

• Anti‑kickback drive mechanism with adjustable deadband (12°, 15°, 18°)


• Decoupled freehub disengages during coasting for reduced drag and smoother suspension


• Near‑silent operation for a more immersive riding experience


• Reduced chain slap and vibration for improved comfort and control


• World Cup–proven reliability, fully serviceable and rebuildable

How Sidekick Improves Suspension

The adjustable deadband filters chain tension before it reaches the pedals, allowing the rear suspension to move freely without resistance from pedal kickback. The result is:

• Better small‑bump compliance


• More consistent suspension performance


• Improved traction and cornering stability


• Reduced rider fatigue on long descents

Technical Specifications

• Axle: 148 × 12mm Boost


• Driver: Microspline


• Hole Count: 32H


• Disc Mount: 6‑Bolt


• Spokes: J‑Bend


• Weight: approx. 456g (Boost Microspline)


• Ratchet Ring: 60T pusher‑driven pawl system


• Deadband Adjustment: 12° / 15° / 18° (tool‑free)


• Use: Trail, All‑Mountain, Enduro, E‑MTB compatible

Why Riders Choose Sidekick

• Virtually eliminates pedal kickback


• Significantly reduced coasting drag


• Quieter, smoother, more controlled ride feel


• Proven under the world’s fastest riders

The e*thirteen Sidekick GR Rear Hub is the ultimate upgrade for riders seeking maximum suspension performance, reduced fatigue, and a near‑silent, ultra‑smooth ride.