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I'm assuming that you're asking about wheels, not wells.
Basically they're measured straight across the centre, from one edge to the other. What makes things rather confusing is that usually the measurements refer to from one edge of the tire to the other.
But this means that if you use a tire that is thinner than what was originally intended when the size was defined, then your measurement might not make much sense. It's safer to use the I.S.O. method, where you measure to the point of the rim where the tire attaches and gives a more well-defined value in mm. As long as the BSD (bead seat diameter) matches, each rim can take a couple of different tire widths w/o trouble.
What else can I help you with?
How are bicycle tires measured and what is the standard unit of measurement used for them?
Bicycle tires are measured by their diameter in inches. The standard unit of measurement for bicycle tires is inches, with the diameter typically ranging from 12 to 29 inches.
How do you measure the size of a bicycle accurately?
To measure the size of a bicycle accurately, you can typically refer to the frame size, which is usually measured in inches or centimeters. This measurement is taken from the center of the bike's bottom bracket to the top of the seat tube. Additionally, you can also consider the wheel size, which is measured in inches and refers to the diameter of the wheels on the bike. These measurements can help determine the appropriate size of a bicycle for a rider.
A bicycle tire has a radius of 13.25 inches how far will the bicycle travel in 40 rotations of the tire?
3328.4 inches
How are bicycle wheels measured accurately for size and fit?
Bicycle wheels are accurately measured for size and fit using the diameter of the wheel, typically in inches or millimeters. This measurement is important for ensuring the wheel fits properly within the frame of the bicycle and aligns with the brakes and other components. Riders can also consider factors like width and tire size to ensure a proper fit for their specific needs.
How many inches is the frame of a standard bicycle?
The frame of a standard bicycle is typically around 18 to 22 inches in size.
What is a pencil measured in?
a pencil is measured in inches
What is plug gap measured in?
inches and on some motors are measured like 0.035 inches
What is the unit of rainfall measurement?
Rainfall is typically measured in millimeters (mm) or inches (in).
What is the recommended tire size for a bicycle with a wheel diameter of 29x2.25 inches?
The recommended tire size for a bicycle with a wheel diameter of 29x2.25 inches is typically 29 inches in diameter and 2.25 inches in width.
What is the equivalent size of a bicycle tire labeled as 700x45c in inches?
A bicycle tire labeled as 700x45c is equivalent to approximately 27.5 inches in diameter.
What are the instruments used in measuring inches?
Inches is measured by inch-tape.It is also measured by scale.
How do you calculate a gear ratio on a bicycle?
Bicycle gears are measured in inches. The formula is 27 (Size of wheel.) divide by number of teeth on rear sprocket. Multiplied by the number of teeth on chainwheel. Example 27 divide by 18, times 50, equals 75.0 inch gear.
