Originally Posted by
stevegor
Some of the guys I race with will go as high as 140-150 psi (which is way over the manufacture's specs), it produces a rock hard tyre with a rock hard ride. They claim it makes them super fast?
This has been carefully tested... there is no significant change in rider speed, but what does change are rider perceptions. Almost universally, riders feel faster on harder tyres. A slightly softer ride is felt as being sluggish and slow. But testing has shown these feelings to be unreliable. Take a corner on too-hard tyres will actually lose you traction as it bounces around.