If you’re going big, the newest cranks from e*thirteen are for you. Engineered to meet the demands of downhill, bike park, enduro, and freeride, the Helix Race GR Cranks exceed ASTM 5 standards, yet are kept fairly light for an aluminum crankset.

To make that happen, the arms are forged, then CNC machined from 6066-T6 aluminum with a 7050-T7 aluminum 30mm spindle. Those spindles are offered in 73mm and 83mm versions to fit standard enduro bikes or DH bikes, and the arms are offered in 160 or 165mm lengths only.

Specs:

Chainline: 

• 83mm spindle cranks: Helix GR Chainrings for 56.5mm chainline
• 73mm spindle cranks: Helix Chainrings for 55mm chainline

Chainring: 

• 83mm spindle cranks – Helix GR Chainring
• 73mm spindle cranks – Helix Race, Helix Plus, or Helix Steel DM Chainrings 

*Not compatible with SL or UL Chainrings 

Ring Color: Black, Sterling Silver

Features:

• Exceeds ASTM 5 standards for gravity use 
• Forged and CNC Machined for optimized strength-to-weight ratio and classic styling 
• Molded crank boots 
• Adaptive Preload System (APS) 
• Proven P3 Connect polygon spindle interface

Length: 160mm, 165mm

Material: Forged, CNC Machined AL 6066-T6 arms, 30mm AL 7075-T73 spindle

Spindle: 

• Width: 73mm or 83mm
• Diameter: 30mm
• Interface: P3 Connect

Weight:  

• 83mm x 160mm: 590g / 664g w 34t Ring
• 83mm x 165mm: 607g / 681g w 34T ring
• 73mm x 160mm: 584g / 638g w 34T Helix Race Chainring
• 73mm x 165mm: 599g / 653g w 34T Helix Race Chainring

Helix Race GR Direct Mount Chainring

Cranks will be offered with various chainrings from e*thirteen, including the new Helix Race GR Direct Mount rings. Forged from 7075-T6 aluminum and then machined, the rings feature e13’s M4 narrow-wide tooth profile, which is compatible with Shimano and SRAM chains, including T-Type. The Helix Race GR rings will be available in black or sterling silver, and in 34 or 36t.

Specs:

Chain Retention: Updated M4 narrow-wide tooth profile improved retention, reduced chain noise, and decreased system wear

Chainline: 56.5mm with Helix Race GR 83mm spindle cranks

Color: Black, Sterling Silver

Compatibility: Helix Race GR 83mm Spindle cranks (73mm Cranks use Helix Race Chainrings) 

Material: AL 7075-T6

Size: 34T / 36T options

Weight: 34T: 74g / 36T: 79g