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how much will my speedometer be off with bigger tires
Increasing the tire diameter will definitely have an impact on the odometer and speedometer. It will cause the displayed values of the odometer and speedometer to be less than or greater than the actual values. The speed of the automobile engine refers to the speed of the automobile flywheel, which is realized according to the reciprocating motion of the engine piston. The flywheel of the automobile engine is connected to the wheel axle through the gearbox. The rotation of the flywheel is transmitted to the wheel axle through the gearbox in proportion. When the car leaves the factory, it has recorded the tire size, engine speed and other relevant information into the car computer, and calculated the mileage and speed of the car according to the engine speed, transmission gear, wheel diameter and other parameters. If you increase the size of a car's tires, it is equivalent to increasing the circumference of the tires. If the engine has the same speed and the transmission has the same gear, the greater the circumference, the faster the driving speed will be. Otherwise, the slower it will be. The vehicle mileage calculated by this method will also be smaller than the actual mileage due to the larger tire diameter.
The impact of tires on vehicle speed -- The size of tires The size of tires has a complex relationship with the driving speed. In principle, the ratio of the original tires to the vehicle is the most reasonable, because the size of tires should be related to the vehicle's power performance. Even if a small displacement vehicle is replaced with a large tire, it will not run because of insufficient power. If a large displacement vehicle has too small tires, it will limit the power output and affect the speed.
1.The impact of the larger tire size on the car is that the driving resistance torque will change under the same working conditions, that is, the acceleration and climbing force of the car will decrease, but in theory the car's extreme speed will increase.
2.The wheel's up and down run out travel will be smaller, and the suspension system (shock absorption) needs to be strengthened;
3. The actual speed is slightly higher than the displayed speed.The vehicle speed displayed by the speedometer is calculated by the wheel axle speed and the original wheel diameter. If the tire size increases, the speedometer displays 80KM, and the actual speed should be 80 times the actual diameter/original tire diameter.
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