You are reading a single comment by @jersey and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@jersey
so much bullshit in this thread about aerodynamics and shit.
PSI affects rolling resistance, because PSI decreases casing deformation. Narrow tires (say like 19 mm clinchers that my friends swears by) are run at a higher PSI because they have to be, and so they are associated with a lower rolling resistance.
Higher PSI will lead to less pinch flats and, in theory, more puncture flats. I side with higher PSI because i like lower rolling resistance and assume that glass will cut into tires at almost any ridable PSI. I also like the way a very hard tire feels on a bike.
Shitty tires will get more puncture flats than good city tires. This is the biggest variable. Get good city tires (to prevent flats) and run them at the maximum PSI (to make for a fast ride).
I ride Contis 23mm Ultra Race on my geared bike, and 25mm Ultra Gatorskins on my fixed bike. There is a logic to this. They are the same fucking tire, except that (3 layers of casing at 60 TPI), but the Gatorskins have some "duraskin" shit. I don't know what it is, but it works well. The Ultra Race are fast fucking tires when run at 125PSI, and work for my geard bike because it never sees the city. I always ride it out in the hills and there's nothing on the streets except dead rodents and bird shit. The Gatorskins are indestructible. Run them at 125 PSI and they are still pretty fast. They are relied on for preventing flats when i'm riding around downtown.