SIDEKICK FLUX WHEELS
Two systems, engineered as one. Flux rims absorb the trail and hold your line. Sidekick hubs free your suspension and kill drag.
Two systems, engineered as one. Flux rims absorb the trail and hold your line. Sidekick hubs free your suspension and kill drag.
You've been working harder than you need to. White-knuckling every square edge, powering through pedal kickback, fighting wheels that deflect off everything. Flux wheels end that. The rims absorb the chatter and hold the line. The hubs disconnect the drivetrain from your suspension and kill the drag. The wheels do the work now. Your job is to handle the speed.
TWO TECHNOLOGIES, ONE SYSTEM
Flux Rim Technology
We inverted the profile. Where conventional rims bow outward, Flux bows inward. The low-profile concave shape acts as additional suspension, absorbing trail chatter before it reaches your hands. Same compliance, front and rear. Rear rims are rated to a higher ASTM category for the heavier loads they take.
Up to 33% more angular compliance. 19% more vertical compliance vs. best-in-class.
Sidekick Hub Technology
We engineered out pedal kickback. Where traditional hubs send drivetrain shock straight into your cranks, Sidekick decouples the drivetrain from your suspension. Pawls retract during coasting, killing drag and silencing the wheel. Tool-free deadband adjustment between 9, 13, and 18 degrees.
E-MTB rated, near-silent coasting, less drag, and lightweight.
Learn more about Sidekick
Example shown is the Sylvan Pro Carbon All-Mountain rear wheel. Features vary between models.
The award-winning Sidekick is the only hub that eliminates pedal kickback, has near-zero drag, and runs near-silent in a single design. Magnetic pawl-retraction disengages the drivetrain from suspension the instant you stop pedaling. Tool-free deadband adjustment between 9, 13, and 18 degrees.
The Flux rim's concave, low-profile shape is the opposite of conventional convex designs. This geometry lets the rim act as additional suspension, delivering up to 33% more angular compliance and 19% more vertical compliance versus best-in-class. Every model shares a 30mm inner width optimized for modern tire profiles.
Every Flux rim carries separate ASTM rating designations for front and rear use. Front wheels see different forces than rears, so the same rim may carry a higher category rating up front than in the back. Choose your rim based on your riding discipline and intended wheel position.
Pro wheels are handbuilt with Sapim D-Lite double-butted spokes and Sapim Secure Lock nipples with washers for precise, long-lasting tension. Trail and all-mountain Pro builds use alloy nipples to save weight. Enduro and DH Pro builds use brass for durability. Standard Flux wheels use double-butted spokes with Secure Lock brass nipples.
Every Flux wheel ships trail-ready with tubeless tape and Quick Fill valves pre-installed. Add tires and sealant. Hookless flanges engineered to specific ETRTO tolerances provide set-and-forget tubeless security with added impact resistance. Pair with Grappler tires and Tire Plasma sealant for the full system.
Backed by the e*thirteen Infinite Ride warranty, one of the most robust in the industry. Lifetime warranty on all carbon and Pro-level aluminum rims. 10-year warranty on all Sidekick hubs. Lifetime guarantee on hub bearings. Crash replacement on non-Pro aluminum rims.
SIDEKICK FLUX WHEELSETS
Every Sidekick Flux Wheelset is purpose-built for a discipline. Front and rear rims are specced separately for compliance up front and durability in the rear. Tubeless-taped with Quick Fill valves, ready to ride.
The lightest wheels in the Flux lineup. Sprint up climbs, float through singletrack, and arrive at the bottom with fresh arms. Flux 33 front, Flux 43 rear.
The versatile all-rounder for mid-travel bikes and light-weight E-MTBs. Climbs all morning, descends all afternoon. Flux 43 front, Flux 54 rear.
Race-proven impact resistance for stage racing, full-power E-MTBs, and riders who push into terrain others avoid. Flux 54 front, Flux 55 rear.
World Cup DH and Hardline proven. Built for the speeds and impacts where other wheels fail. Flux 66 front and rear.
The lightest wheels in the Flux lineup. Sprint up climbs, float through singletrack, and arrive at the bottom with fresh arms. Flux 33 front, Flux 43 rear.
Sidekick Pro SP hub. Sapim spokes & alloy nipples. Lifetime free rim replacement.
The versatile all-rounder for mid-travel bikes and light-weight E-MTBs. Climbs all morning, descends all afternoon. Flux 43 front, Flux 54 rear.
Sidekick hub. Double-butted spokes, brass nipples. 10-year rim warranty.
Sidekick Pro SP hub. Sapim spokes & alloy nipples. Limited lifetime rim warranty.
Sidekick Pro SP hub. Sapim spokes & alloy nipples. Lifetime free rim replacement.
Race-proven impact resistance for stage racing, full-power E-MTBs, and riders who push into terrain others avoid. Flux 54 front, Flux 55 rear.
Sidekick hub. Double-butted spokes, brass nipples. Limited lifetime rim warranty.
Sidekick Pro hub. Sapim spokes & brass nipples. Limited lifetime rim warranty.
Sidekick Pro hub. Sapim spokes & brass nipples. Lifetime free rim replacement.
World Cup DH and Hardline proven. Built for the speeds and impacts where other wheels fail. Flux 66 front and rear.
Sidekick Pro GR hub. Sapim spokes & brass nipples. Limited lifetime rim warranty.
Sidekick Pro GR hub. Sapim spokes & brass nipples. Lifetime free rim replacement.
FLUX RIMS
Three tiers, five ratings. Pick the rims that match your build and budget.
Lightest carbon in the lineup. Lifetime warranty.
Most versatile carbon. Trail to All-Mountain, lifetime warranty.
30mm carbon for aggressive riding. Lifetime warranty.
Enduro carbon. Big rides, races, and descents. Lifetime warranty.
World Cup DH carbon. Lifetime warranty.
Welded Pro alloy. Trail to All-Mountain, lifetime warranty.
Wide-body welded alloy. All-Mountain strength, lifetime warranty.
Welded enduro alloy. Race-rated, lifetime warranty.
Welded gravity alloy. DH and bikepark, lifetime warranty.
Durable 6069 alloy. Trail compliant, 10-year warranty.
Wide-profile 6069 alloy. All-Mountain capable, 10-year warranty.
Gravity-rated 6069 alloy. Built for going downhill, 10-year warranty.
SIDEKICK 2.0 HUBS
Every Flux wheel runs on a Sidekick hub with anti-kickback technology that decouples the drivetrain from your suspension, delivering near-silent coasting, reduced drag, adjustable engagement, and tool-free serviceability. An award-winning hub design that's World Cup proven, now spec'd as standard on all wheels.
THE FULL RANGE
Every wheel and rim in the Flux lineup side by side: materials, sizing, ASTM ratings, and pricing across all tiers. Weights are ±5% and vary with selected driver.
| MODEL | HUB MODEL | FRONT RIM | REAR RIM | SPOKES | NIPPLES | WEIGHT (F) | WEIGHT (R) | SIZES | DRIVERS | HUB SPACING | RIM WARRANTY | HUB WARRANTY | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 01 | TRAIL | ||||||||||||
| 02 | Optimus Pro Carbon | Sidekick Pro SP | Flux Pro 33 Carbon | Flux Pro 43 Carbon | Sapim D-Lite | Sapim Alloy | 695g | 910g | 29" | XD, MS, HG | Boost | Lifetime | 10 Years |
| 03 | ALL-MOUNTAIN | ||||||||||||
| 04 | Sylvan Aluminum | Sidekick | Flux 43 Aluminum | Flux 54 Aluminum | Double-Butted | Brass | 900g | 1,050g | 27.5", 29" | XD, MS, HG | Boost, SuperBoost | 10 Years | 10 Years |
| 05 | Sylvan Pro Aluminum | Sidekick Pro SP | Flux Pro 43 Aluminum | Flux Pro 54 Aluminum | Sapim D-Lite | Sapim Alloy | 830g | 1,030g | 27.5", 29" | XD, MS, HG | Boost | Lifetime | 10 Years |
| 06 | Sylvan Pro Carbon | Sidekick Pro SP | Flux Pro 43 Carbon | Flux Pro 54 Carbon | Sapim D-Lite | Sapim Alloy | 710g | 960g | 27.5", 29" | XD, MS, HG | Boost | Lifetime | 10 Years |
| 07 | ENDURO | ||||||||||||
| 08 | Grappler Aluminum | Sidekick | Flux 66 Aluminum | Flux 66 Aluminum | Double-Butted | Brass | 1,025g | 1,160g | 27.5", 29" | XD, MS, HG | Boost, SuperBoost | 10 Years | 10 Years |
| 09 | Grappler EN Pro Aluminum | Sidekick Pro | Flux Pro 55 Aluminum | Flux Pro 55 (66 @ 27.5") Aluminum | Sapim D-Lite | Sapim Brass | 1,015g | 1,080g | 27.5", 29" | XD, MS | Boost, SuperBoost | Lifetime | 10 Years |
| 10 | Grappler EN Pro Carbon | Sidekick Pro | Flux Pro 54 Carbon | Flux Pro 55 (66 @ 27.5") Carbon | Sapim D-Lite | Sapim Brass | 900g | 1,030g | 27.5", 29" | XD, MS | Boost, SuperBoost | Lifetime | 10 Years |
| 11 | DOWNHILL | ||||||||||||
| 12 | Grappler DH Pro Aluminum | Sidekick Pro GR | Flux Pro 66 Aluminum | Flux Pro 66 Aluminum | Sapim D-Lite | Sapim Brass | 1,000g | 1,209g | 27.5", 29" | Integrated, Mini HG | Boost, SuperBoost | Lifetime | 10 Years |
| 13 | Grappler DH Pro Carbon | Sidekick Pro GR | Flux Pro 66 Carbon | Flux Pro 66 Carbon | Sapim D-Lite | Sapim Brass | 970g | 1,200g | 27.5", 29" | Integrated, Mini HG | Boost, SuperBoost | Lifetime | 10 Years |
SIDEKICK FLUX
Backed by the e*thirteen Infinite Ride warranty, one of the most robust in the industry. Lifetime warranty on all carbon and Pro-level aluminum rims. 10-year warranty on all Sidekick hubs. Lifetime guarantee on hub bearings. Crash replacement on non-Pro aluminum rims.
FAQ
