Originally Posted by
Spoonrobot
What's been your experience switching from 32s to 28s or vice versa?
That my tire pressure had to scale close to linearly with width to maintain what seems like the right road feel. I switched my '83 Miyata 710 from 1 1/4 to 1 1/8 recently (mostly because the rims on that bike are narrow and it seemed weird to get more tires that inflated super bulbously), and found myself going (for rides on quality pavement) from 70-80 to 80-90.
Similarly, on smooth roads, I run the 53s on my gravel bike at 35-40; a bit below the linear scaling, but well above quadratic. According to the quadratic scaling, I'd be running them 25-30, which is pretty gooey and not something I do unless the ride includes considerable amounts of gravel.