e*thirteen Helix R Direct Mount Chainrings, manufactured from durable AL-7075-T6, combine aesthetics and design efficiency. Their flip-flop design accommodates Boost or Super Boost chainlines. With e*thirteen's narrow-wide tooth profile, they ensure enhanced chain retention, reduced wear, and compatibility with Shimano and SRAM chains. Perfectly complementing all Helix Cranks, they''re backward compatible with e*thirteen TRS, LG1, and XCX Race cranks.
Convenient flip-flop design, compatible with both Boost and SuperBoost chainlines (52/55mm)
Direct Mount design for use with Helix cranks, adjustable chainline TRS/LG1 cranks, and XCX Race cranks
Durable 7075-T6 construction for long wear-life, stiffness, and strength
e*thirteen''s Quick Connect direct mount interface keeps the system secure and creak-free
Forged from premium 7075-T7 aluminum, then extensively CNC optimized for light weight, and technical aesthetics
M4 narrow-wide tooth profile provides Shimano and SRAM 11/12-speed chain compatibility, excellent chain retention, and reduced wear
Specifications & Identifiers
Chain Compatibility
11-Speed, 12-Speed
Chainline/Hub Compatibility
141/148 Boost Hubs
Color
Black, Bronze, Silver
Direct Mount Type
Direct Mount e*Thirteen
Intended Use
Mountain
Material
Aluminum
Number of Chainrings
Chain Retaining Single
Offset
3.5mm
Round or Oval
Round
Special Features
Narrow-Wide Tooth Profile
Tooth Count
21, 28t, 30t, 32t
Weight
43, 48, 54, 57
Black - 28 UPC
4711280340897
Black - 28 MPN
CR4HRA-140
Black - 30 UPC
4711280340903
Black - 30 MPN
CR4HRA-141
Black - 32 UPC
400310023384
Black - 32 MPN
CR4HRA-142
Black - 34 UPC
4711280340927
Black - 34 MPN
CR4HRA-143
Bronze - 30 EAN
4710751509924
Bronze - 30 MPN
CR4HRA-117
Bronze - 32 EAN
4710751509931
Bronze - 32 MPN
CR4HRA-118
Silver - 30 UPC
4711280343478
Silver - 30 MPN
CR4HRA-154
Silver - 32 UPC
4711280343515
Silver - 32 MPN
CR4HRA-155
Tree Fort ID:
333222467658
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