You know how much the rolling resistance of tire?

　　You know how much the rolling resistance of tire?

　　In February 2012, I visited Finland in a focus to do independent laboratory WheelEnergy tyre testing, for I was very interested in Vitoria, lightning, Bontrager and other brand tires do in the laboratory test. As an independent laboratory, the test results of Wheel Energy revealed that he will not do for his clients of the experiment, so the only way is to get the test results out of our own pockets were tested in the laboratory.

　　Many of our colleagues are Velo for influence factors of tire rolling resistance each one sticks to his own viewpoint, we all want to see the actual test results to unify our view. With respect to concerned about what works, or that type of tyre runs the fastest, we are more concerned about the research of the tire width and tire pressure for rolling resistance in experimental results.

　　You know how much the rolling resistance of tire?

　　After the test

　　Wheel Energy is the first hydraulic device will be placed on the drum wheel warm-up for half an hour. This approach not only to the tire temperature increase to the actual use of the environment temperature, the residual oil is to remove the new tyre surface wax and stripping the.

　　After the end of the warm tire, the wheel group is placed on a roller with a diameter of 1200 mm, much larger than the roller used for the warm tire, and the large roller has a removable rolling surface. In order to simulate a debris and crack general road conditions, we use the metal stairs surface as a pattern roller surface with diamond - like factory lines, each piece of diamond shaped bulge is about 40 mm long, 3 mm wide, four mm height.

　　Each tyre in such roller with 40km/h speed test, and the Zipp wheel group flower is applied to the weight of 50 kg. Wheel Energy has done two times of rolling resistance testing - 112psi and 84psi were simulated on each tyre.

　　When the stable pressure on the wheel set down, there will be software began to record keeping wheel rotation speed to power, Wheel Energy director Petri Hankiola said: “on the device information is confidential. We spent almost 1000 hours to design the device.” But we can guess that this device is probably related to the power consumed by measuring the rotational speed of the motor wheel set 40km/h.

　　Only then, what kind of tire pressure is what you actually need riding the road?

　　For mountain bike and road, we all know why top drivers will use low tire pressure in response to the bumpy track or downhill race. For road vehicles, each road has a corresponding tire pressure, more than the appropriate tire pressure blind pursuit of high tire pressure, will increase the rolling resistance. （Note: 14 years of the fifth stage of the tour de France stone road competition pressure will generally set at about 85psi, and a considerable part of the team in the wet race will tire pressure down about 5%）