Parthian/Sassanid heavy cavalry use bamboo lances?

[AMELIANVS]

And sometimes you can find a map that pushes boundaries of Sassanid empire more or less beyond the River Indus area.I think I even came across a mention of the kings making campaigns to India...but I'm not sure if it was the real India or just some territory nearby.On the other hand Indian mercenaries and allies certainly served in the sassanid army and met in battle with the Romans.