Originally Posted by
Looigi
tl;dr mainly because 15% tire drop on 23 and 25 mm road tires doesn't work for me. Too squishy, especially in the front when standing. Also prone to pinch flatting.
Agreed. I think many of us look at the recommended front tire pressure given by those tables for narrow tires and instinctively feel that they are too low.
And I think our instincts are correct in that. The figures are based on static weight distribution on level ground and no acceleration. Now consider the circumstance where I'm on a fast descent of a steep hill and see a rough patch of pavement ahead or a bunch of rocks that have been washed onto the road. My weight has already been shifted toward the front wheel by the grade and now is shifted even more when I hit the brakes - in fact if I hit the brakes hard almost the entire weight of bike+rider will be on the front wheel. This is also a circumstance where I really don't want to have loss of control from a fast pinch flat of the front wheel - but there's a big risk of that if I inflated the front tire based on the assumption that only 40% of my weight will be on that tire.