Helix R Direct Mount rings are designed to function equally well with all 11 and 12-speed SRAM™ and Shimano™ drivetrain systems on e*thirteen Helix or legacy TRS/LG1/XCX cranks.

• e*thirteen's Gen 4 narrow-wide tooth profile delivers upgraded chain retention, lower system noise, and increased wear-life
• Cross-Compatible with SRAM and Shimano 11 and 12 speed chains
• Convenient flip-flop design, compatible with both Boost and SuperBoost chainlines (52/55mm)
• Pair seamlessly with Helix and Helix R cranks, or with legacy TRS/LG1/XCX cranks using included 1mm spacer ring
• e*thirteen's Quick Connect direct mount interface keeps the system secure and creak-free
• Forged from 7075-T7 aluminum, then extensively CNC optimized for light weight, and technical aesthetics
• Tough enough for any MTB discipline

Specifications:

• Chainline/Hub Compatibility: 141/148 Boost Hubs
• Chainline/Hub Compatibility: 157 Super Boost Hubs
• Color: Gray
• Defined Color: Gray
• Direct Mount Type: Direct Mount e*Thirteen
• Drivetrain Speeds: 10
• Drivetrain Speeds: 11
• Drivetrain Speeds: 12
• Material: Aluminum
• Offset: Flip-Flop 0/5
• Ring Position/Type: Chain Retaining Single Ring
• Round or Oval: Round
• Tooth Count: 32