As of this writing, SRAM's transmission drivetrain is new to the market, so we have not yet exhaustively tested the new T-Type® chain with e*thirteen chainrings.

Still, we have been able to perform some preliminary fit-up and testing, and here's what we know so far!

Rule of Thumb

e*thirteen chainrings with our latest M4 tooth shape are compatible with T-Type chains. This includes Helix Race Direct mount, Helix Race 3-bolt, Helix Race e*spec, and Helix Race 107mm BCD chainrings.

Helix Plus and Helix Steel direct mount rings are not compatible. Older rings with M3 tooth profiles are also not compatible. 

Note: Flattop™️ chains have rollers which are slightly larger OD than Eagle™️ chains. It is possible that these larger rollers may result in slightly accelerated wear of drivetrain components which have not explicitly been designed for the larger OD rollers. While we have not quantified this in lab testing, we have seen varying reports of this in the field. Drivetrain wear rate is an extremely complicated topic due to the large number of variables and you can read a bit more about that here. 

e*thirteen Helix Race direct mount, 3-bolt, e*spec, and 107mm BCD chainrings: Compatible ✅

e*thirteen Helix Plus or Core direct mount chainrings: Not Compatible ❌

e*thirteen UL direct mount chainrings: Not Compatible ❌

e*thirteen SL Guidering direct mount chainrings: Not Compatible ❌

e*thirteen e*spec direct mount chainrings (Forged, 5 arm model): Not Compatible❌

(Bosch ring shown for example)