How To Measure A Bikes Wheel And Tire Size
Riding a bike is one of the greatest joys in life. However, it can break down and require repairs from time to time. Let’s take a look at how to measure a bike’s wheel and tire size to get back on the road.
Why Measure A Bike’s Wheel?
First of all, why is it important to measure a bike’s wheel? Well, it gives you a better sense of the specifics of your bike. If you’re looking to purchase a replacement wheel, you need to know how large the wheel should be.
Alternatively, if you want to purchase a new bike altogether, it’s good to know how large your previous bike was. Whenever you mention your bike to a friend or professional, being able to recite your tire size is invaluable.
Once you measure your bike’s wheel, you will never have to do it again. The only tool you will need for this task is a trusty measuring tape or measuring stick. Make sure it is over three feet in length.
First Thing’s First
You’ll want to stand the bike up as opposed to laying it down. This will align the bike’s frame just like you’re riding it for an accurate measurement. It can also be difficult to reach certain parts of the bike when it is lying down.
How To Measure The Diameter Of The Tire
This is what you’re here for. Take your tape measure and measure the diameter of the tire. Because this is a longer distance than the radius, it’s more accurate overall. Make sure to stretch the tape measure over both ends of the tire instead of stopping when you hit the rim. This is the standard procedure.
How To Measure The Width Of The Tire
Now that the diameter has been measured, it’s time to move on to the width. Take your tape measure and place it across the tread of a tire. This is a very short distance, so you’ll want to use the smaller tick marks on the tape for the most accurate reading. Once again, don’t stop short across the tire.
Calculate The Circumference
You’ve got the diameter of the tire. However, sometimes you’ll need the circumference to search for the right fit. Fortunately, there is a very simple formula for calculating the circumference of the tire. Simply multiply the diameter by pi, a mathematical constant that is approximately 3.14. Don’t hesitate to use a calculator for this one. The result will be the circumference of the tire, the length of one full revolution. Many tire manufacturers use this as their standard measurement, so it’s always handy to have on hand.
There are also a few alternative methods to measure a bike’s wheel size.
Use A String
If you want to directly measure the circumference, consider using a string. Pull the string taut around the tire and mark where it overlaps. Then, simply unravel the string, and pull it tight next to a measuring stick. Read the stick to find out the circumference.
Use Wet Paint
Similarly, wet paint is an efficient way to measure the circumference. Add a splash of wet paint to a certain spot on the wheel. Roll the bike until it makes two dots on the ground. Take out your measuring tape and calculate the distance between these dots. This is particularly efficient because it guarantees that everything will be in a straight line.
Don’t Worry About Conflicting Measurements
When using these measurements to purchase new parts or a new bike, you might be afraid that you’ve made a mistake. There sure are a lot of numbers floating around in the store. However, rest assured that you’ve done a good job.
Over the last few decades, bike measurements have been standardized by world organizations. Previously, different countries were measuring the rims and treads of tires in different manners, leading to confusion all around. Today, the circumference is a standard way of measuring a bike. There’s really no way to make a mistake unless you misread your measuring tape or deflate the tires to a criminal degree.
In conclusion, these are some great ways to measure a bike’s wheel and tire size. By following these steps, you’ll end up with an accurate measurement that you can fit with the appropriate parts. Different bikes come in different shapes and sizes, so you’ll want to be very careful when measuring your bike.