What is the diameter of a 295/30R18 tire?

A 295/30R18 tire has an overall diameter of 24.97 inches (634.2mm).

How many revolutions per mile does a 295/30R18 tire make?

A 295/30R18 tire makes approximately 808 revolutions per mile.

What rim width is recommended for 295/30R18 tires?

The recommended wheel rim width for a 295/30R18 tire is 7.4" - 10.3".

295/30R18

Standard Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The 295/30R18 tire size features an overall diameter of 24.97 inches, a section width of 11.6 inches (295mm), and rotates 808 times per mile. It is a standard factory tire fitment on 31+ vehicle models including Dodge Viper.

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Physical Dimensions & Specs

Overall Diameter

24.97"

634.2 mm

Section Width

295 mm

11.61" wide

Sidewall Height

3.48"

88.4 mm (30% aspect)

Revolutions / Mile

808

Circumference: 78.44"

Rim Diameter

18"

Wheel size

Recommended Rim Width

7.4" - 10.3"

Optimal rim width range

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Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare 295/30R18 against any proposed tire size below:

Popular Comparisons:

Tire 1 (Stock / Base)295/30R18

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:25.0"

Sidewall:3.5"

Revs/Mile:808

Tire 2 (New / Compare)245/60R18

Section Width (mm)

Aspect Ratio (%)

Rim Diameter (in)

Wheel Width (in)

Offset ET (mm)

Overall Height:29.6"

Sidewall:5.8"

Revs/Mile:682

Visual Tire & Wheel Comparison

Speedometer Variance

+18.4%At 60 mph reading, actual speed is 71.1 mph

Indicated	Actual Speed	Diff
20 mph	23.7 mph	+3.7 mph
30 mph	35.5 mph	+5.5 mph
45 mph	53.3 mph	+8.3 mph
60 mph	71.1 mph	+11.1 mph
75 mph	88.8 mph	+13.8 mph
90 mph	106.6 mph	+16.6 mph

Fender & Suspension Clearance

Fitment Status: MODERATE RISK

Flush fitment. Extends 17.7mm outwards. Check wheel arch clearance under full suspension compression.

Inner Strut Space:7.7mm LESS clearance

Outer Fender Push:Extends 17.7mm further out

Ride Height Delta:+2.30" ground clearance

Vehicles That Fit 295/30R18 (31+ Models)

Factory standard and optional vehicle fitments utilizing 295/30R18 tires:

Year	Make & Model	Trim / Variant	Lookup Specs
2008	Dodge Viper	SRT-10 ACR	View 2008 Viper ›
2009	Dodge Viper	SRT-10 ACR	View 2009 Viper ›
2010	Dodge Viper	SRT-10 ACR	View 2010 Viper ›
2001	Porsche 911	Turbo, Automatic	View 2001 911 ›
2001	Porsche 911	Turbo, Standard	View 2001 911 ›
2002	Porsche 911	Turbo, Standard	View 2002 911 ›
2002	Porsche 911	Turbo, Automatic	View 2002 911 ›
2003	Porsche 911	Turbo, Automatic	View 2003 911 ›
2003	Porsche 911	Turbo, Standard	View 2003 911 ›
2004	Porsche 911	Carrera 4S, 2D Convertible, Automatic	View 2004 911 ›
2004	Porsche 911	Carrera 4S, 2D Convertible, Standard	View 2004 911 ›
2004	Porsche 911	Carrera 4S, 2D Coupe, Automatic	View 2004 911 ›
2004	Porsche 911	Carrera, 2D Convertible, Automatic	View 2004 911 ›
2004	Porsche 911	Carrera 4S, 2D Coupe, Standard	View 2004 911 ›
2004	Porsche 911	Carrera, 2D Convertible, Standard	View 2004 911 ›
2004	Porsche 911	Turbo, 2D Coupe, Automatic	View 2004 911 ›
2004	Porsche 911	GT3	View 2004 911 ›
2004	Porsche 911	Turbo, 2D Coupe, Standard	View 2004 911 ›
2004	Porsche 911	Carrera, 2D Coupe, Standard	View 2004 911 ›
2004	Porsche 911	Carrera, 2D Coupe, Automatic	View 2004 911 ›
2004	Porsche 911	Turbo, 2D Convertible, Standard	View 2004 911 ›
2004	Porsche 911	Turbo, 2D Convertible, Automatic	View 2004 911 ›
2005	Porsche 911	Carrera 4S, Standard	View 2005 911 ›
2005	Porsche 911	Carrera 4S, Automatic	View 2005 911 ›
2005	Porsche 911	Turbo S, 2D Coupe, Standard	View 2005 911 ›
2005	Porsche 911	Turbo, Standard	View 2005 911 ›
2005	Porsche 911	Turbo S, 2D Convertible, Standard	View 2005 911 ›
2005	Porsche 911	Turbo S, 2D Convertible, Automatic	View 2005 911 ›
2005	Porsche 911	Turbo S, 2D Coupe, Automatic	View 2005 911 ›
2005	Porsche 911	GT3	View 2005 911 ›
2005	Porsche 911	Turbo, Automatic	View 2005 911 ›