• This guide will cover the install of e*thirteen SL rings (-8mm offset), e*thirteen UL rings (-5mm offset) and Helix direct mount chainrings which are reversible and provide either -3mm or -5mm offset. 

  The configurations shown in this guide are for industry standard chainline numbers for non-boost, boost and superboost. Our adjustable chainline spacer system allows the rider to dial in the actual chainline to optimize it for specific bikes and use cases. 

• Start by identifying what chainring you have. 

SL Chainring product page

• For SL rings go to step 2 of this guide. SL rings are -8mm and on 73mm spindle cranks, will work with non-boost 49mm chainline on 135/142mm bikes and "boost" 52mm chainline on 148mm bikes. When paired with 83mm LG1 DH cranks will provide 56mm chainline on 150/157mm bikes.

UL Chainring product page

• For UL rings go to step 3 of this guide. UL rings are -5mm will work with 148x12 (Boost) bikes to achieve a 52mm chainline.

Helix Direct Mount Chainring product page

• For Helix Rings go to step 4 of this guide. Helix rings are reversible to achieve a -3mm or -5mm offset and achieve either a 52.5 "boost" chainline or a 55.5 "SuperBoost" chalinline.

Helix Race and Helix Plus chainrings are 1mm thinner at the crank mounting location than UL or SL rings. A 1mm spacer is supplied with all Helix chainrings to account for this difference when a Helix ring is installed on a TRS/LG1 crank with adjustable chainline. This spacer MUST be used in addition to the 3mm worth of spacers already found on the crank.

If setting up a configuration where the lockring is tightening against a spacer, ensure that the spacers are sitting fully in the grooves of the mounting location so the lockring is fully compressing the system.

• Thread on lockring with spacers in correct location for chainring offset and rear hub spacing

• Tighten lockring to 30Nm (Snug + 90 degrees)

Thanks for reading, now get out there and ride!