
The e*thirteen Sidekick GR Rear MTB Hub features a unique anti-kickback drive mechanism with adjustable deadband, providing smooth suspension performance, reduced fatigue, and nearly silent operation for an unparalleled riding experience. Designed and tested with the world's top teams and racers over multiple seasons, the Sidekick GR offers the broadest driver compatibility in the lineup across Boost 148mm and 157mm (DH, Superboost) spacing.
The freehub mechanism disengages the drivetrain from the rear wheel when coasting, and an adjustable deadband filters kickback and chain vibration before it reaches the pedals, virtually eliminating pedal feedback effects on suspension. With the drive mechanism disengaged from the ratchet ring, drag is significantly reduced, resulting in an impeccably smooth ride over the roughest terrain, improved traction, and reduced fatigue.
- Adjustable pawl-pusher allows tool-free tuning of deadband between 12°, 15°, and 18° to suit rider preference, bike type, and terrain
- Chain tension filtered by the deadband ensures suspension is unhindered by resistance from pedal kick-back, resulting in improved, more consistent performance, and simpler setup
- Durable 60T ratchet ring with innovative pusher-driven 3-pawl system provides silent operation and reduced drag by remaining disengaged unless pedaling
- Available in Boost 148x12mm, Superboost 157x12mm, 148mm DH, and 157mm DH spacing
- XD, HG, Microspline, Mini-HG, and 7-speed integrated cassette driver compatibility
- 6-Bolt disc mount, 28h and 32h J-bend spoke configurations
- E-MTB compatible
- Proven on the World Cup, fully serviceable and rebuildable, backed by a 5-year warranty
Pair with the Sidekick Pro Front MTB Hub to complete the build.
Axle
Drilling
e-Bike Compatible
Engagement
Freehub Mount
Mount
Spokes/Nipples
Weight
148x12mm Boost Microspline 429g
148x12mm Boost, HG 435g
157x12mm Superboost, XD 432g
157x12mm Superboost, Microspline 437g
157x12mm Superboost, HG 443g
157x12mm, 7 spd 9-24t DM Cassette 600g
157x12mm, Mini-HG 435g
148x12mmn DH, 7 spd 9-24t DM Cassette 594g
148x12mm DH, Mini-HG 428g
Guaranteed to be free from defects in materials or workmanship for 5 years after original purchase
Sidekick Hubs
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What is Sidekick?
The Sidekick Hub by e*thirteen is a revolutionary rear mountain bike hub designed to enhance suspension performance by eliminating pedal kickback and filtering chain vibration.Â
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How does Sidekick Work?
A proprietary freehub mechanism disengages the drivetrain from the rear wheel when coasting, and an adjustable engagement deadband filters kickback and chain vibration before it reaches the pedals, isolating all pedal feedback from the suspension.
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What is Pedal Kickback?
Pedal kickback occurs when suspension movement applies tension to the chain, causing unwanted pedal movement and compromising suspension performance.Â
Sidekick Flux Wheels
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What is Flux?
Inspired by the legendary strength and durability of our LG1 Race rims, our riders called for discipline-specific DH and Enduro rims that pair our historic resilience with a more forgiving and compliant ride. The Grappler Flux Rim is our response: a masterpiece of engineering designed to deliver the robustness racers trust, with enhanced ride quality for peak performance and comfort.
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How are Flux rims different?
Grappler Flux rims are a fusion of unique low-profile rim sections materialized in high-modulus carbon fiber or 6069-AL, meticulously engineered for the ultimate balance of strength and compliant, controlled ride feel. These innovative rims redefine performance in mountain biking, offering a new dimension of durability, ride quality, and comfort.Â
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Who is it for?
Tailored for the competitive racer and the passionate enthusiast alike, Grappler Flux rims are available in Enduro and DH variations. Grappler Sidekick Flux wheels come in all popular axle configurations and are suitable for class 1 e-bike use. They’re the ideal choice for riders who challenge the limits of speed and agility on fast, aggressive tracks and trails while desiring more comfort, reduced fatigue, and enhanced traction.