Originally Posted by
Roelof
Probably just a 7075 but there are the T specifications and there are differences between brands, it is difficult to say. The R7 rod is just a rocksolid conrod and I just think they altered the design to save some weight (for what it is worth)
T should be the heat treat on the material. 7050 is stronger, but I don't know if it's a viable option to use in nitro. 7075, although rare, is much more common than 7050.