Cavalier and Trick Riding

[Defoliant]

I've done my best to search for an answer to this and apologize if it has already been covered somewhere. With that said, the feat Trick Riding only functions 'while wearing light or no armor'.

I'm wondering whether the fact that Cavaliers do not suffer from an armor check penalty while riding their mount permits them to benefit from this feat.

[ProfPotts]

Nothing suggests that Cavaliers treat their worn armour as a lighter category when riding their mounts, no: they just don't suffer the armour check penalty to the Ride skill (but they still take it to any other effected skills, of course). To benefit from Trick Riding they still need to be wearing light or no armour. A mithral breastplate (medium counted as light armour due to being mithral) is their best bet (unless Ultimate Combat has added anything?).

To be honest I imagine that Trick Riding is a better bet for Rangers taking the Mounted Combat combat style (since they can get it without meeting the prerequisites and, generally, are less likely to be riding around in heavy armour). On the other hand, a Cavalier on his mount isn't likely to fail many Ride checks anyway, taking no penalties (and one assuming putting as many ranks into the Skill as he can).