Reading an old bike repair book from the 80s and found a weird detail about tire pressure

I was going through some old stuff at the shop and found a bike maintenance guide from 1987. It said for a standard 700c road tire, you should run it at 95 to 105 psi. I checked that against a modern chart from a big tire maker's website, and now they recommend 70 to 90 for the same size. That's a drop of like 25 psi on the high end in less than 40 years. I guess the thinking on rolling resistance and comfort has really changed. Has anyone else noticed this shift in recommended pressures over their career?

2 comments

2 Comments

simon_coleman6d ago

Lower pressure made my rides way more comfortable.

hugoc976d ago

Simon_coleman, that's actually the opposite of what works for most people (and tires).