e*thirteen's Grappler Sidekick Pro rear wheel upgrades the Sidekick hub with a lighter, oversized alloy axle and new bearings and seals for less drag. The 27.5in version uses the burlier Flux 66 Pro rim to withstand the added abuse of mixed-wheel gravity use.

Highlights

  • Pro-tier Sidekick hub: magnetic pawl-retraction, lower drag
  • 148×12mm Boost rear axle, XD freehub driver (Microspline version sold separately)
  • 30mm internal width Flux 66 Pro aluminium rim, hookless, 28-hole
  • Sapim D-Lite spokes, Secure Lock brass nipples with washers

Hub and rim

The Sidekick Pro hub uses a 3-pawl, triple-sealed design with an adjustable 9°/13°/18° deadband. The rear-tuned build favours drive-side stiffness for crisp power transfer.

Compatibility & fit

Rear wheel only, XD freehub (SRAM-compatible cassettes) — pair with an e*thirteen Grappler Sidekick Pro front wheel. Suits 148×12mm Boost frames; e-MTB compatible. The Tune workshop can true and service this wheel.

e*thirteen covers this wheel's rim and hub bearings with a lifetime warranty to the original purchaser, and all other parts for 10 years from the date of purchase, against defects in materials and workmanship. Normal wear and tear and crash damage are excluded. For warranty support, return the product to Tune Cycles and we'll manage the claim with e*thirteen's Australian distributor. This is in addition to your rights under the Australian Consumer Law, and keep your proof of purchase.
  • Sidekick Pro anti-kickback rear hub, lower drag
  • 148×12mm Boost axle, XD freehub driver
  • Burlier Flux 66 Pro aluminium rim, hookless, 30mm internal width
  • 28-hole, Sapim D-Lite spokes, Secure Lock brass nipples
  • e-MTB compatible
Brande*thirteen
Wheel size27.5in
PositionRear
Axle standard148×12mm Boost
FreehubXD
RimFlux 66 Pro, aluminium (AL-6069), hookless
Internal width30mm
Hole count28
SpokesSapim D-Lite, Secure Lock brass nipples
Weight1110g
ColourBlack
Part numberWH5GKA-225
SKU DTW-ETG-WH5GKA-225
Barcode # 4711280348039
Brand e*Thirteen