305/40R23 In Inches

What size tire is 305/40R23 in Inches?

The 305/40R23 equivalent to 32.6x12R23 in inches, as follow:

  • 32.6 inches (828mm) stand for the tire diameter, also referred to as the tire height
  • 12 inches (305mm) is the tire width, this may also know as the section width
  • 23 inches (584mm) represent the rim diameter or called the wheel diameter that can be mounted on.
InchesMetric
Tire Diameter32.6"828 mm
Tread Width12"305 mm
Rim Diameter23"584 mm
Sidewall Height4.8"122 mm
Circumference102.4"2601 mm
Revolutions618 revs/mile384 revs/km
tire diameter
12"
32.6"
Tire Side
Tire Circumference
102.4"
23"
4.8"
618 Revs/Mile

What is a 305/40R23 tire width?

The 305/40R23 has a width of 12 inches or 305 mm wide. This is the measurement of the tire at its thickest point, the distance between the inner sidewall’s widest point and the outer sidewall’s widest point. This physical width of the tire can change if the tire is mounted on a wheel slightly wider or narrower than the size indicated by the rim width.

How big is a 305/40R23 tire’s height?

The overall diameter of a 305/40R23 is 32.6 inches or 828 mm tall (measurement of a tire’s outside diameter through its exact center when inflated with no load.

What size rim do I need for 305/40R23?

The size rim of a 305/40R23 tire is 23 inches or 584 mm tall. This number represents the distance between the two bead seat areas where the tire is sealed onto the wheel.

How tall is a 305/40R23 tire sidewall’s height?

The sidewall height of a 305/40R23 is 4.8 inches or 122 mm tall. It’s measured from the wheel rim to the top of the tread, expressed as a percentage of tire width.

What about 305/40R23 tire circumference?

305/40R23 tire has a circumference of 102.4 inches or 2601 mm

How many revolutions for 305/40R23 per mile & kilometer?

The 305/40R23 performs 384 revolutions per kilometer or 618 revolutions per mile. Revolutions per mile indicate the number of times a tire revolves while it covers the distance of one mile/kilometer

What’s wider or narrow than 305/40R23 is acceptable?

You can replace the 305/40R23 tires that are within ±3% of the overall tire diameter. In this case, it’s between 31.6 and 33.6 inches (803mm to 853 mm). Check our tire size chart here or the tire size calculator tool here to find your size.


Tire Size Chart for 23" Wheels:

28″ Tire Diameter

29″ Tire Diameter

30″ Tire Diameter


31″ Tire Diameter

32″ Tire Diameter

*Disclaimer: The information provided on the tire size is for general informational purposes only. We recommend that you consult a certified tire specialist or National Highway Traffic Safety Administration (NHTSA) sets specific guidelines for tires used on vehicles.


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Jamie Hicks

Sullivan Kane

Tire Technician at TireSizesCalculator

Sullivan is a Tire Technician specializing in tire repair at TireSizesCalculator. With over 6 years of experience in the industry, Sullivan has become an expert in tire repair, maintenance & installation.


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