- 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. * Suitable for 9/10/11x chainsets * For middle triple specific rings use TBF.. * For inner triple specific ring use TAH.. For ideal shifting we strongly recommend combining the rings with a gap of between 12 and 16 teeth.