Let’s say you have the Quick Climber feat, and have a climb speed equal to your land speed. If you put on Boots of Speed, does your climb speed increase by 5 feet, or 10 feet?
For example, when the Boots of Speed boost your land speed, both your land speed and climb speed go up by 5 feet, because your climb speed is equal to your land speed. However, when the Boots of Speed then explicitly give an item bonus to climb speed on top of that, you wind up with twice the bonus to your climb speed.
You could say that this doesn’t work because item bonuses don’t stack, but it’s not clear to me whether it’s two item bonuses stacking. For example, you could say that your base climb speed is equal to the land speed after item bonuses, and that base climb speed can then in turn be boosted by its own item bonuses. Is this correct or not?