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2011 El Camino Real
Palo Alto, CA 94306
Phone: (650) 853-3000
Open: Mon-Fri 11-7 Sat 10-7 Sun 10-6
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1090 Folsom St
San Francisco, CA 94103
On-Site Parking
Phone: (415) 934-8000
Open: Mon-Fri 11-7 Sat 10-7 Sun 10-6
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e*thirteen Ultralight Guidering (5mm Boost)

e*thirteen Ultralight Guidering (5mm Boost)
$69.95 - $104.99
Color: Black
Size: Select size
Please select options Unavailable


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.

- Direct Mount chainring for XCX, TRS, and LG1 cranks
- Updated M3 narrow-wide tooth profile eliminates chain noise, and decreases overall system wear while retaining chain
- 10/11/12 speed. Compatible with both Shimano and SRAM 12-speed drivetrains
- Provides Boost 148mm chainline on XCX Mountain cranks and 142mm chainlines on XCX Gravel cranks
- Provides chainline for Superboost spacing on TRS and LG1 cranks

UL Chainrings are not compatible with Helix cranks. Helix cranks require Helix rings available soon.

Part Numbers

Option UPC MPN Store SKU
Black / 30T 04710751505162 CR3UNA-106
Black / 32T 04710751505179 CR3UNA-107
Black / 34T 04710751505186 CR3UNA-108
Black / 36T 04710751505193 CR3UNA-109
Black / 40T 04710751505216 CR3UNA-111 EV8618
Black / 42T 04710751505223 CR3UNA-112