Sidekick Pro SP Rear MTB Hub
SKU:HB5UKA-252
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The Sidekick Pro SP Anti-Kickback Rear MTB Hub is the choice for trail, all-mountain, and lightweight E-MTB riders building the lightest, stiffest wheel possible without giving up anti-kickback performance. At 275g, it is the lightest hub in the Sidekick lineup: straight-pull spokes, full anti-kickback, and Pro-level upgraded internals in one package.
Straight-pull spokes eliminate the J-bend stress point at the flange and deliver a measurably stiffer, lighter wheel. Combined with the Sidekick platform's full drivetrain isolation near-zero drag, near-silent operation, and tool-free 9°/13°/18° deadband adjustment the Pro SP is the build choice for riders who want every possible performance advantage from their hub, without sacrificing on weight. At 9°, engagement is fast and direct, comparable to a conventional hub, ideal when climbing is the priority. Open it up to 13° or 18° for maximum anti-kickback and suspension performance on descents.
Internally, the Pro SP runs EZO driver bearings, TPX hub shell bearings, and nickel-plated steel pawls and pusher. Same World Cup-validated mechanism, tuned for maximum longevity.
- 275g the lightest hub in the Sidekick lineup; straight-pull spokes, Boost 148mm
- Eliminate pedal kickback full drivetrain isolation during coasting
- Near-zero freewheeling drag at least 55% less than competing hubs in controlled tests
- Near-silent operation hear your tires and terrain, not your hub
- Tool-free deadband adjustment 9° / 13° / 18°; narrowest setting delivers quick engagement for climbing, wider settings maximize anti-kickback performance
- EZO + TPX bearings, nickel-plated pawls and pusher
- XD and Microspline driver compatibility Boost 148mm axle, HG driver available for purchase separately
- 6-Bolt disc mount, 28h straight-pull spoke configuration
- 17mm alloy axle, ASTM 5 rated at 150kg
- E-MTB compatible
- 10-year warranty with lifetime bearing coverage, fully rebuildable, designed for extended service
Pair with the Sidekick Pro SP Front MTB Hub at 129g the lightest front hub in the lineup.
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e-Bike Compatible
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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.
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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.
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.
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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.
