Grappler Sidekick | Flux Aluminum | Rear Wheel | GR Enduro | 27.5" x 30mm | 28 Hole | 148x12mm Boost | XD 
Driver | Black

The Grappler Sidekick Flux wheel represents a major breakthrough in MTB wheel design, combining advanced anti‑kickback hub technology with engineered rim compliance to deliver a smoother, faster, and more controlled ride. Developed and refined over two full World Cup seasons, these wheels have been pushed to the limit by the world’s fastest athletes—and the results speak for themselves.

At the heart of the system is the Sidekick hub, featuring an adjustable deadband that eliminates pedal kickback and frees your suspension to work exactly as intended. By filtering drivetrain shock and vibration before it reaches the rider, the wheel dramatically improves traction, tracking, and overall ride comfort. The exceptionally low drag and whisper‑quiet operation help carry more speed through rough terrain, making every section feel smoother and faster.

Paired with the low‑profile Grappler Flux Alloy rim, the wheel delivers a level of compliance and comfort that stiff, wooden‑feeling rims simply can’t match. The rim’s engineered flex pattern adds radial compliance and traction without sacrificing steering precision, giving the wheel a lively, responsive character on the trail.

Handbuilt with Sapim D‑Light spokes, locking alloy nipples, and a fully serviceable hub system, the Grappler Sidekick Flux is built for riders who demand race‑level performance and long‑term reliability.

Features

• Improved suspension performance: Sidekick anti‑kickback hub with adjustable deadband eliminates kickback and filters drivetrain vibration


• Free speed: Ultra‑low drag and near‑silent operation carry more speed than traditional freehub systems


• Enhanced comfort & control: Low‑profile Flux Alloy rim adds compliance and traction without sacrificing steering precision


• Lively ride feel: Double‑butted 28‑spoke build creates a responsive, dynamic wheel character


• Race‑level construction: Handbuilt with Sapim D‑Light spokes and locking alloy nipples


• Ultimate reliability: World Cup proven, fully serviceable, and rebuildable

Specifications

• Hub: Sidekick — triple‑sealed, fully machined aluminum, 3‑pawl / 6° engagement


• Spoke Count: 28


• Brake: 6‑Bolt


• Rim: Flux Alloy, hookless


• Spokes: Sapim D‑Light with Sapim Polyax alloy nipples & washers


• Internal Width: 30mm


• Depth: 17.5mm


• Material: Aluminum


• Type: Tubeless


• Weight: 27.5" — 12x148 Boost — SRAM XD: 1187g