The e*thirteen Helix R 3-Bolt Direct Mount Chainrings, engineered for SRAM 3-Bolt crank systems, merge aesthetics with robust durability. e*thirteen's narrow-wide tooth profile ensures compatibility with Shimano and SRAM 11 and 12-speed drivetrains. Manufactured from AL-7075-T6 aerospace-grade aluminum, the rings are CNC sculpted to provide low weights. Elevate your 3-Bolt Cranks, diversify drivetrains, reduce weight, and bring a new aesthetic to your bike with the Helix R 3-Bolt Chainrings.
3mm Offset, 3-Bolt Direct Mount design for use with SRAM 3-bolt direct mount compatible cranks
Durable 7075-T6 construction for long wear-life, stiffness, and strength
Forged from premium 7075- T7 aluminum, then extensively CNC optimized for industry leading weights, and a unique high-end full CNC aesthetic
M4 narrow-wide tooth profile provides Shimano and SRAM 11/12-speed chain compatibility, excellent chain retention, and reduced wear
Specifications & Identifiers
Chainline/Hub Compatibility
141/148 Boost Hubs
Chainring BCD
Direct Mount - SRAM
Chainring Position
Chain Retaining Single Ring
Color
Black
Designed for ebike
No
Direct Mount Type
Direct Mount SRAM, Direct Mount SRAM 3-Bolt
Intended Use
Mountain
Material
Aluminum
Offset
3mm
Round or Oval
Round
Special Features
Narrow-Wide Tooth Profile
Speeds
11-Speed, 12-Speed
Tooth Count
30t, 32t
Weight
43, 46
Black - 30 UPC
822051250858
Black - 30 MPN
CR4HRA-145
Black - 32 UPC
4711280340958
Black - 32 MPN
CR4HRA-146
Tree Fort ID:
333222467659
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