Remove centaurs’ ability to wear body armor, but allow them to wear barding instead.

A horseshoe item that can be equipped on any equine creature (including player centaurs), in the boots slot. Horseshoes could deal a small amount of additional damage in kick attacks, and also deal damage based on their material, e.g. silver damage to silver-haters if the shoes are silver.

If you are a centaur (via polymorph or some variants’ centaur race), you can joust things without needing to ride another monster.