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e*thirteen XCX Ultralight Chainring


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The e*thirteen XCX Ultralight Chainring are the lightest 1x XC/Gravel chainrings on the market! Use with the XCX Race MTB Crank.

Using the SL Chainring as the platform, we tweaked the arm design and strategically machined the chainring so that only minimal sacrifice was made in impact strength for large gains in weight reduction.

UL Chainrings are -5mm (Boost) offset for use with XCX Race MTB cranks on Boost bikes. If you’re installing XCX Race MTB Cranks onto a non-Boost (142mm) bike, please use SL Chainrings. e*thirteen SL Guidering

 ALL XCX Gravel applications will use the UL ring.

e*thirteen XCX Ultralight Chainrings are not compatible with Helix cranks. Helix cranks require Helix rings available soon. 

  • Chain retention: Updated M3 narrow-wide tooth profile eliminates chain noise and decreases overall system wear.
  • Chainline:

TRS/LG1 Cranks: UL Chainring for SuperBoost chainline. SL Chainring for non-Boost and Boost chainline.
XCX Mountain Cranks: UL Chainring for Boost chainline. SL Chainring for non-Boost chainline.
XCX Gravel Cranks: UL Chainring for non-Boost chainline (142mm rear hub spacing)

  • Compatibility:

– 10/11/12 speed. Compatible with both Shimano™ and SRAM™ 12 speed drivetrains.

– Cranks Compatible with: Legacy e*thirteen cranks with direct mount interface, All TRS Cranks, All LG1 cranks. Not compatible with: Helix

  • Features: Lightweight and durable design, minimal aesthetics, and updated M3 tooth profile.
  • Material: 7050 Aluminium
  • Mount: QuickConnect™
  • Teeth: 32 – 36T
  • Weight: 32T – 64g, 34T – 68g, 36T – 74g
  • Colour: Black

Installing e*thirteen XCX UL Chainring

Guaranteed to be free from defects in materials or workmanship for 5 years after original purchase.


Additional information

Ring Size

30T, 32T, 34T, 36T


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