Posted on May 27th 2021

---

---

How does the speedometer work?

The speedometer was aligned at the plant for the stock-size tires and wheels installed before the vehicle left the line. 

The alignment was determined dependent on the ratios of gears in the drive cable, the last drive ratio in the differential, and the diameter of the tires. 

That last thing is essential. See for each revolution of the tire; the wheel covers a specific distance. The distance that the tire covers in a single cycle are equivalent to its circumference. Fast math boost:

A 20″ wheel will cover 62.83 inches in one cycle. Replace those with 24″ spins, and then you will cover 75.40 inches. However, your speedometer will not have any distinction. Anyway, you perceive what changing wheel size means for the speedometer? It does not need to happen. Adhere to the first consolidated diameter of the wheel, and you should be good.

Changing wheel size without affecting speedometer:

For a practical example, suppose you own a 2018 Lexus GS350. At the point when you can figure out how to pull the ladies off you and your car sufficiently long to get online, you start looking for some new wheels. You have the stock 17″ wheels on there now, and you need more.

In this way, you look at 18″ inch wheels, and you are obsessed with Cruiser Alloy. The bolt design, backspacing, and offset are an ideal match. You love the way those reflected spokes reach out to the rim, and the dark accents are the bomb. Be that as it may, what will happen to your speedometer if you go up to 18″ wheels? Will you attract more cops because you cannot measure your speed? At 17″, every cycle is covering 53.41 of the road. At 18, you are up to 56.55 inches. That is practically 6% more with only one revolution.

So, changing the wheel size will not influence the speedometer. You will change the standing height of the tire. When you add an inch to the wheel, you should subtract an inch from the standing height of the tire.

---