TA only make their chainrings from the best 7075 T6 heat treated aluminium sheet. The teeth are cut in the traditional manner on a lathe which produces a much better and more accurate tooth form than pressing which is used by most chainring manufacturers.

Nerius for Campag 11x only, can convert Some Campag Carbon 10x chainsets to 11x. 
Can be fitted to Super Record, Record, Chorus, Athena and Centaur chainsets. 
Weights: 34T 29g to 50T 78g


For post 2011 11x Ultra-Torque chainsets please use TAD305 (threaded inner bolts) when changing the inner chainring.