The Helix Race Alloy GR is e*thirteen's gravity crank: forged aluminium arms on a 30mm spindle, built to the same ASTM 5 standard as the brand's downhill and bike park cranks, at an alloy price. This 83mm-spindle version suits wider DH and freeride BB shells.

Highlights

  • Forged, CNC-machined AL6066-T6 crank arms
  • 30mm AL7075-T7 spindle on e*thirteen's P3 Connect interface
  • ASTM 5 rated for downhill, bike park, enduro and freeride
  • 83mm spindle for 83mm BB shells
  • APS preload adjuster and self-extractor system for easy fitting and removal
  • Moulded crank boots and BB/lockring tool included

Gravity-rated strength

e*thirteen builds the Helix Race Alloy GR to the same ASTM 5 strength standard as its downhill cranks, for riders who want DH-grade durability without the carbon price.

Compatibility & fit

83mm spindle for 83mm BB shells only. Takes e*thirteen's 83mm-specific Helix GR chainrings at a 56.5mm chainline — the standard Helix Race, Plus, Steel DM, SL and UL chainrings do not fit the 83mm spindle. Bottom bracket and chainring are sold separately; the Tune workshop can fit both.

e*thirteen covers the Helix Race Alloy GR crankset for 10 years against manufacturing and material defects, plus a discounted crash replacement policy. 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. Keep your proof of purchase.
  • Forged CNC AL6066-T6 arms, 30mm AL7075-T7 spindle
  • ASTM 5 rated for DH, bike park, enduro and freeride
  • 83mm spindle, 83mm BB shell
  • APS preload adjuster and self-extractor system
  • Moulded crank boots and BB/lockring tool included
Brande*thirteen
ModelHelix Race Alloy GR
Crank arm length165mm
Spindle30mm AL7075-T7, P3 Connect
BB shell83mm
MaterialForged CNC AL6066-T6
RatingASTM 5 (DH/bike park/enduro/freeride)
Chainring interfaceHelix GR only, 56.5mm chainline (sold separately)
Weight607g (±5%)
Colour (option)Black or Silver
SKU DTW-ETG-CS5HAA-10-PAR2
Brand e*Thirteen