Best 305/30 R21 Tires. Rims & Conversion Info

305/30 R21 in inches What rims fit 305/30 R21 tires What is 305/30 R21?

Best 305/30 R21 All-Season Tires

Image of Continental ProContact RX
Continental ProContact RX
Overall: 41%
Dry: 83%
Wet: 79%
Snow: 48%
Comfort: 81%
Wear: 62%
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Best 305/30 R21 Summer Tires

Image of Goodyear Eagle F1 Asymmetric 3
Goodyear Eagle F1 Asymmetric 3
Overall: 84.1%
Dry: 84.3%
Wet: 87%
Comfort: 88%
Wear: 81%
Buy again: 80%
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Image of Pirelli P Zero PZ4
Pirelli P Zero PZ4
Overall: 68.1%
Dry: 88.5%
Wet: 82.5%
Comfort: 78.5%
Wear: 57.5%
Buy again: 71%
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Image of Pirelli P Zero Nero GT
Pirelli P Zero Nero GT
Overall: 65.1%
Dry: 70.3%
Wet: 63%
Comfort: 63%
Wear: 68%
Buy again: 51%
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Best 305/30 R21 Winter Tires

Image of Michelin Pilot Alpin 5
Michelin Pilot Alpin 5
Overall: 88.4%
Dry: 90%
Wet: 95%
Snow: 88%
Comfort: 83%
Wear: 88%
Buy again: 92%
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Image of Pirelli Winter Sottozero Serie II
Pirelli Winter Sottozero Serie II
Overall: 81%
Dry: 87%
Wet: 89%
Snow: 81%
Comfort: 88%
Wear: 84%
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Best 305/30 R21 All-Season TiresBest 305/30 R21 Summer TiresBest 305/30 R21 Winter Tires

305/30 R21 in inches

305/30 R21 tires' overall diameter is 28.2 inches, tire width is 12 inches, the tire can be mounted on 21 inches wheel and the circumference is 88.6". With that parameters, we can calculate that it will take approximately 715.1 revolutions per mile.

Popular comparisons with this size

What rims fit 305/30 R21 tires?

For each tire size there often there are several wheel sizes. You can't put too wide tires on narrow rims or vice versa. Here is what size of the wheels your vehicle needs for 305/30 R21 tires:

Rim diameter x rim width

305/30 R21 – what does it mean?

Parameter Meaning
305 The first number shows that the tire has a section width of 305 mm or approximately 12 inches.
30 The second number is the aspect ratio or sidewall height. In this case, it is 30%. It shows the height of the tire from the ground to the rim edge or the height of the tire's cross-section which is 30% of the width or ~ 92mm
R21 The letter R means this tire is radial. Most of all tires nowadays are radial. The number is the tire diameter in inches. It means that the tire will fit 21-inch wheels

If you want to know more about how to decipher information inscribed on your tires, including aspects such as the tire height, tire width, and the diameter of the wheel, this guide provides an in-depth look at how to read a tire sidewall. These measurements can reveal a wealth of information about your tire's specifications and suitability for your vehicle. Mastering these details will allow you to make informed decisions when buying or replacing your tires.