Chain Ring XCX Ultralight Guide Ring Direct BOOST 10/11/12Spd 42T Black (CR3UNA-112) (CTN20)

$137.95 Inc. GST
In Stock

UL Chainrings are the lightest 1x XC/Gravel chainrings on the market. 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 cranks on Boost bikes. 

If you're installing XCX Race Cranks onto a non-Boost (142mm) bike, please use SL Chainrings.



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


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)

Color - Black
Compatibility - 10/11/12 speed. Compatible with both Shimano™ and SRAM™ 12 speed drivetrains.
Features - Lightest 1x chainring on the market. Ultralight design, minimal aesthetics, and updated M3 tooth profile.
Material - 7050 Aluminum
Mount - QuickConnect™
Teeth - 30-42t options

30t: 52g
32t: 54g
34t: 58g
36t: 64g
38t: 70g
40t: 79g
42t: 86g


Barcode # 4710751505223
Brand e*thirteen
Shipping Weight 0.2000kg
Shipping Cubic 0.000800000m3

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