Answer: Yes, but additional spacers are required at the mounting location. Alloy Helix rings require an additional 1mm spacer and steel Helix rings require an additional 2mm of spacers.

Details: e*thirteen UL and SL chainrings were designed for use with XCX, TRS, and LG1 Cranksets. Helix chainrings were deigned for use with Helix cranksets. UL and SL rings are 1mm thicker than Helix chairings at the mounting location. Each Helix Direct Mount ring is supplied with a 1mm spacer which should be used when mounting Helix Direct Mount rings to XCX, TRS, and LG1. 

The following spacer assemblies should be used with Helix Direct Mount rings on e*thirteen cranks:

XCX Cranks:

• Helix Direct mount ring + 1mm spacer included w/ Helix direct mount ring. 
  • Spacer should be installed first, then chainring.

TRS/LG1 Cranks:

• Helix Direct Mount Ring + 1mm spacer included w/ Helix direct mount ring + 3mm of chainline spacers included with and already installed on crankset (Generally 1 x 2mm and 1 x 1mm).
• See charts below for ring/spacer configurations.

Helix Cranks:

• Helix Direct Mount Ring only.

Chainring / Spacer configurations for alloy Helix Plus and Helix Race rings when used with e*thirteen TRS and LG1 cranks with adjustable chainline*:

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*For steel Helix ring install, add an additional 1mm spacer between the crank and chainring.