305/50R17 tire size in inches

A 305/50R17 tire measures

29.0" tall × 12.0" wide

6.00" sidewall on a 17" wheel. 695 revolutions per mile.

305/50R17 means a tire 305 mm wide, with sidewalls 50% as tall as the tire is wide (153 mm), radial construction (R), for a 17 inch wheel.

29.0"17" rim6.0"12.0" wide
305/50R17: 29.0 inches tall, 12.0 inches wide, on a 17 inch rim, drawn to scale

305/50R17 specs

Overall diameter (height)29.01 inches (737 mm)
Section width12.01 inches (305 mm)
Sidewall height6.00 inches (153 mm)
Wheel (rim) diameter17 inches
Circumference91.1 inches (2,315 mm)
Revolutions per mile695
Revolutions per kilometer432
Approximate rim width9.0" to 10.5"
In inches (flotation style)29.0x12.0R17
Aspect ratio50%

Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.

Sizes that can replace 305/50R17 on a 17" wheel

These 17" sizes are within 3% of 305/50R17's overall diameter, the range most tire shops treat as interchangeable.

SizeDiameterWidthDifferenceReal speed at 60
235/65R1729.03"9.25"+0.1%60.0 mphCompare
255/60R1729.05"10.04"+0.1%60.1 mphCompare
275/55R1728.91"10.83"−0.3%59.8 mphCompare
205/75R1729.11"8.07"+0.3%60.2 mphCompare
215/70R1728.85"8.46"−0.5%59.7 mphCompare
285/55R1729.34"11.22"+1.2%60.7 mphCompare
295/50R1728.61"11.61"−1.4%59.2 mphCompare
225/70R1729.40"8.86"+1.4%60.8 mphCompare
315/50R1729.40"12.40"+1.4%60.8 mphCompare
245/60R1728.57"9.65"−1.5%59.1 mphCompare
195/75R1728.52"7.68"−1.7%59.0 mphCompare
225/65R1728.52"8.86"−1.7%59.0 mphCompare

Same height on other wheel sizes (plus and minus sizing)

SizeWheelDiameterDifference
215/65R1818"29.00"0.0%Compare
255/25R2424"29.02"0.0%Compare
275/60R1616"28.99"−0.1%Compare
355/25R2222"28.99"−0.1%Compare
255/35R2222"29.03"+0.1%Compare
255/40R2121"29.03"+0.1%Compare
255/45R2020"29.04"+0.1%Compare
255/50R1919"29.04"+0.1%Compare
285/40R2020"28.98"−0.1%Compare
225/45R2121"28.97"−0.1%Compare
255/55R1818"29.04"+0.1%Compare
295/30R2222"28.97"−0.1%Compare

One size up or down

Compare 305/50R17 with another size

With 315/50R17 tires, when your speedometer says 60 mph you are really going

60.8 mph

315/50R17 is +0.39 inches (+1.4%) in overall diameter. That is within the 3% most shops and makers allow.

305/50R17315/50R17Difference%
Overall diameter29.01"29.40"+0.39"+1.4%
Section width12.01"12.40"+0.39"+3.3%
Sidewall height6.00"6.20"+0.20"+3.3%
Circumference91.13"92.37"+1.24"+1.4%
Revolutions per mile695.3686.0−9.3−1.3%

Questions

How tall is a 305/50R17 tire?
A 305/50R17 tire is 29.0 inches tall (737 mm), calculated from the size. It is 12.0 inches wide with 6.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
What does 305/50R17 mean?
305/50R17 means a tire 305 mm wide, with sidewalls 50% as tall as the tire is wide (153 mm), radial construction (R), for a 17 inch wheel.
How many revolutions per mile does a 305/50R17 tire make?
About 695 revolutions per mile, based on a circumference of 91.1 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
What rim width fits a 305/50R17 tire?
Roughly 9.0" to 10.5". Check the tire maker's approved rim range for the exact model before buying wheels.
Can I use 235/65R17 instead of 305/50R17?
235/65R17 is +0.02 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.

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