What is 87H in tyres?
R stands for “Radial” and the last two figures 16 indicate the wheel diameter in inches. The size ends with the load index 87, which is the maximum weight that each wheel can support, and the speed rating H, which is the maximum speed at which the tyre is approved for use. Letters ranging from A to Z represent the speed rating. Each letter denotes the maximum speed a tyre can sustain under its recommended load capacity. In our example, “H” is equivalent to a maximum speed of 130 mph (209 kph).This is the section width of the tyre. That means the overall width of the tyre in mm. This is the aspect ratio of the tyre. That is the sidewall height of the tyre as a percentage of the section width. R: This mean the tyre is of Radial construction.This means that the car can carry a max load of 2240 kgs, when inflated to it’s max inflation pressure, which mentioned on the tyre sidewall. H relates to the speed at max load which the tyre is capable. H – 210 kph, V – 240 kph. Trust we have clarified your doubts.The speed rating is the last letter out of the digits on your tyre. Let’s say your tyre shows: 195 / 55 / R / 16 87V The speed rating would be “V. The last two digits before the letter is the load index, so it would be “87. A tyre with a load index of this amount can carry 545kg.R stands for “Radial” and the last two figures 16 indicate the wheel diameter in inches. The size ends with the load index 87, which is the maximum weight that each wheel can support, and the speed rating H, which is the maximum speed at which the tyre is approved for use.
Is 40 psi too high for tire pressure?
No, for most cars a tire pressure of 40 psi is too high. You might find 40 psi suitable for some vehicles, especially if they’re carrying heavier loads or if the manufacturer’s recommendation is close to that figure. However, it’s generally too high for most passenger cars, which usually recommend between 30-35 psi. While you should always stay within this range, you should also never be below 20 PSI, or over 50 PSI, or you risk serious tire damage (more so than with standard overinflated or underinflated tires to a lesser degree).Keep it between 32 – 35 psi and make sure to keep the same pressure in all tyres. More pressure will result in more bumpier rides but fuel efficiency will improve slightly. Less pressure will help to ride small potholes & uneven roads with ease and you won’t feel jerks inside the cabin.Only use that lowest bar for emergencies—you should not regularly drive on tires with 20 psi unless necessary. Anything below 20 psi, and you’re driving on a flat tire. In such cases, it’s best to pull over safely and inflate the tire or change it for a spare instead of driving further.
What is the speed rating of a 195 55 R16 tyre?
Take, for instance, the specification ‘195/55 R16 87V. While most people recognize the width, height, rim diameter, and load aspect, the alphabet ‘V’ at the end holds a specific meaning. In this case, ‘V’ denotes that the tyre can reach speeds of up to 240 km/hr. The higher the number, the greater the load capacity – an 87 load capacity means that tire can support 1,201 pounds. Speed ratings range from L (75 mph) through V (149 mph), and an S speed rating means the tire is good for 112 mph.Tires across the treadwear range, which normally ranges from 800 down to 100, provide the grip and longevity needed in applications from long-endurance trailer tires, to premium daily tires, to full-on racing slicks. The lower the number, the higher the grip. The higher the number, the longer they last.
Is 40 too high for tyre pressure?
In conclusion, tire pressure is an important factor in keeping your vehicle safe and performing optimally. The recommended tire pressure for most vehicles is between 30-35 PSI (pounds per square inch). A tire with a higher PSI rating such as 40 can have both benefits and risks depending on the driving conditions. While you should always stay within this range, you should also never be below 20 PSI, or over 50 PSI, or you risk serious tire damage (more so than with standard overinflated or underinflated tires to a lesser degree).