Need some information about road tyres

The maximum rated pressure varies by manufacturer/model and should be printed on the side of your tire. The maximum rated pressure might not give you the best performance, because your weight and the road surface are also factors to consider. Your tire manufacturer might have an online guide, but here are a few others:
Bicycle tire pressure calculator
michelinbicycletire.comindex.cfmOpen ↗

Not knowing the Max PSI on your tyres and riding them at 145 PSI sounds risky to me. You should check the manufactures recommended PSI up online.

I use Fortezza Tires I purchased from Performance. They have a maximum tire pressure recommendation of 145 psi. However I only inflate them to 120 psi. Generally, a harder tire will create less surface area of tire touching pavement, which in turn reduces rolling resistance compared to surface area in contact. This essentially allows you to travel faster. Lower air pressures, say about 90 psi may drag a little in comparison, but they tend to grip the road better allowing for sharper turns at speed and rolling downhill. And as the previous posts mentioned, always check the side wall of your tires for best inflation setting.

If you want to run really high pressures in the belief that you'll go faster then get some good tubular track tires, like continetal olympics and pump the upto 200psi...

... Otherwise get with the program and pump your tires to a more reasonable pressure between 100 and 120psi dependent on your weight, road surface and expected time in the saddle.

Scotty_Dog said:

The maximum rated pressure varies by manufacturer/model and should be printed on the side of your tire. The maximum rated pressure might not give you the best performance, because your weight and the road surface are also factors to consider. Your tire manufacturer might have an online guide, but here are a few others:
Bicycle tire pressure calculator
Michelin Bicycle USA - A better way forward®

Thanks alot for the useful information

swampy1970 said:

If you want to run really high pressures in the belief that you'll go faster then get some good tubular track tires, like continetal olympics and pump the upto 200psi...

... Otherwise get with the program and pump your tires to a more reasonable pressure between 100 and 120psi dependent on your weight, road surface and expected time in the saddle.

from where could i get 200PSI tyres?

a7md-r said:

from where could i get 200PSI tyres?

No no no. Sarcasm is great. Over your head.

What do your tires say on the side walls ??

Are you riding a road bike ??

gman0482 said:

No no no. Sarcasm is great. Over your head.

What do your tires say on the side walls ??

Are you riding a road bike ??

yes on the side 145 PSi 10 BAR

Put them down to 120 psi and try them out there. I'm sure you'll be happy with the smoothness and the handling on turns.

a7md-r said:

from where could i get 200PSI tyres?

Dude, don't do it! You're going to take a turn at speed and skip off the road. The high psi thing is a myth. I've never met a pro who has ridden over 130. Most would never even consider riding at 130. You're talking 100-120 like Swampy said. Don't overthink this one!

When you get to the higher pressures, you should check the max pressure ratings on the tires AND wheels.

If you're running clinchers I doubt you'll be able to safely go over 125 psi. The warning labels are there for a reason - you also might void the warranty if you don't stay within the recommended ranges.

For example, my Vredsteins can handle 175 psi, but my wheels have a maximum of 125 psi. If you want really high pressure, go for tubulars. Anyway, too high of a pressure will compromise cornering performance. Lower pressure allows for greater contact surface area and greater traction.