Switches do not activate at the bottom of the travel, they typically activate about halfway down. The force increases linearly to the bottom-out point. (For t

Switches do not activate at the bottom of the travel, they typically activate about halfway down. The force increases linearly to the bottom-out point. (For tactile switches like these, there is an additional spring that is unrelated to the bottom-out force, which makes the first half of the travel non-linear.) The travel after the activation point is just to prevent your fingers from pushing the keys all the way to the bottom. Once you hit the bottom, infinite force yields a movement of 0mm, so it's "infinite grams". So you should look at these numbers as how much cushioning you need after you hit the activation point. With purely linear switches, you don't need a spring to "catch" you, so you can go lower. With tactile switches, the force abruptly goes to almost zero, so momentum will carry your fingers farther down the travel. The bottom-out spring is designed to dissipate that energy before you slam the slider into the bottom of the switch. (As a thought experiment, imagine a car suspension spring as a keyswitch that requires 1 nanometer of travel to activate. You would not tire yourself out typing on that, and you would never bottom out.) I use 67gf bottom-out switches, "Healios", and they are very middle-of-the road in my opinion. I have used lighter switches, I have used heavier switches. I do not bottom out on them, but they do feel about as light as I'm willing to go. (I use Box Navy as my daily driver, which are quite a bit heavier in terms of activation force. Also louder!)