bnystrom wrote:The Firm chart still seems ridiculously high for gravel.
Yah, roughly the firm is for road and soft is for gravel. I tend to bounce between those two figures depending if I'm doing all pavement / fast paceline vs mostly gravel. Realistically, plenty of riders don't want/need a squishy tire (although around here the asphalt is worst than the gravel in the summer).
Main difference is that the original only went from 20mm to 37mm. For gravel, only having a choice between 32 and 37mm wasn't that useful. Now it is well incremented to 55mm making it a LOT more useful for us.
It's high for road tires, too. I run 25 (rear) to 35 (front) psi lower than their recommendation for 25c tires. That's 70 front and 80 rear vs. their 105 recommendation, and my tires are not squishy. This is in line with the Soft chart, which is much closer to recent trends in tire pressure.
Well, its based off of tire drop. But yeah, I only run those high pressure and small sizes at the velodrome (where the effective weight is 2-3x my normal weight).
The soft chart is ideal for most riding, except for smooth surface racing.