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245/45R20 Tire Size
All You Need to Know About 245/45R20 Tires
245/45R20 tires have a section width of 245 millimeters (mm), an aspect ratio of 45%, radial construction, and a 20-inch wheel diameter. The 275/40r20 tire size has an overall diameter of 28.7 inches and fits within a 7.5’’-9.0’’ rim width range, making it a common fitment for electric performance sedans and performance-oriented crossovers/SUVs.
245/45R20 Size Quick Specs
- Overall diameter/total height: 28.7 in
- Sidewall height: 4.3 in
- Section width: 245 mm
- Rim width range: 7.5-9.0 in
- Wheel diameter: 20 in
245/45r20 Tire Size In Inches
A 245/45r20 tire has a section width of 9.65 inches (≈ 9.6") and a sidewall height of 4.34 inches (≈ 4.3").
The 245/45r20 diameter (OD) is 28.68 inches (≈ 28.7"), and the circumference is approximately 90.10 inches (≈ 90.1").
245/35/20 width is 9.65 inches (245 mm).
Common Vehicle Fitments for 245/45R20 Size
- Audi e-tron GT / RS e-tron GT (2022–2025, front axle, factory staggered setup)
- Porsche Taycan (2020–2025, front axle, factory staggered 20" wheel option)
- Ford Mustang Mach-E GT (2021–2025, factory 20" wheel fitment)
- BMW X4 (multiple trims including xDrive30i, M Sport, and M40i, front axle, factory staggered setup)
- Lexus LC500 / LC500h (2018–2025, front axle, factory staggered setup)
- Dodge Charger (SXT, GT, and select trims with factory 20" wheels)
- Dodge Challenger (SXT, R/T, and GT trims with factory 20" wheels)
- Cadillac XT4 (Sport and upper trims with factory 20" wheels)
- Buick Envision (2021–2025, Avenir and select trims with factory 20" wheels)
245/45r20 Tires For Sale
Well-regarded 245 45 20 tires include:
Toyo 245 45 r20: Toyo Celsius II, Toyo Proxes Sport A/S+
Budget UHP tires 245/35r20: Ironman iMove Gen2 A/S, Ironman iMove Gen 3 AS
245 45 r20 all season: Pirelli Cinturato P7 All Season, Continental ProContact RX
Comparison of 245/45R20 With Similar Tire Sizes
Comparing 275/40r20 vs 245/45r20 and 245/45R20 with 245/35R20 shows how changes in aspect ratio and wheel diameter affect overall diameter, ride comfort, handling response, and whether a swap is physically possible without changing wheels.
What Is the Difference Between 245/45R20 vs 245/35R20?
The main difference between 245/45R20 and 245/35R20 is the aspect ratio. Both tires fit 20-inch wheels, but the lower-profile 245/35R20 has a much shorter sidewall and a significantly smaller overall diameter.
The 245/45R20 has a sidewall height of 110.25 mm (≈ 4.34") and an overall diameter of 728.50 mm (≈ 28.68"). The 245/35R20 has a sidewall height of 85.75 mm (≈ 3.38") and an overall diameter of 679.50 mm (≈ 26.75").
This means the 245/35R20 sidewall is 24.50 mm (≈ 0.96") shorter, and the overall diameter is 49.00 mm (≈ 1.93") smaller.
245/45R20 vs 245/35R20 Tire Size Comparison Table
Tire Dimension | 245/45R20 (mm & in) | 245/35R20 (mm & in) | Difference (mm & in) | Percentage Difference |
Section Width | 245 mm (≈ 9.65") | 245 mm (≈ 9.65") | 0 | 0% (vs width) |
Sidewall Height | 110.25 mm (≈ 4.34") | 85.75 mm (≈ 3.38") | 24.50 mm (≈ 0.96") | ≈ 22.22% (vs sidewall) |
Overall Diameter | 728.50 mm (≈ 28.68") | 679.50 mm (≈ 26.75") | 49.00 mm (≈ 1.93") | ≈ 6.73% (vs diameter) |
Circumference | 2288.65 mm (≈ 90.10") | 2134.71 mm (≈ 84.04") | 153.94 mm (≈ 6.06") | ≈ 6.73% (vs diameter) |
Radius | 364.25 mm (≈ 14.34") | 339.75 mm (≈ 13.38") | 24.50 mm (≈ 0.96") | ≈ 6.73% (vs diameter) |
Rim Diameter | 20" | 20" | — | — |
Recommended Rim Width | 7.5–9.0" | 8.0–9.5" | — | — |
What Is the Difference Between 275/40r20 vs 245/45r20?
The 275/40r20 is a wider tire, while the 245/45r20 is narrower with a nearly identical overall diameter. Although the 245/45R20 is technically about 0.1 inches taller (28.7" vs 28.6"), the most significant difference is the 1.2-inch greater width of the 275/40R20. This wider footprint can improve dry-road grip and handling stability, while the narrower 245/45R20 may slightly reduce rolling resistance and can perform better in snow and slush when using proper winter tire compounds and tread designs.
All You Need to Know About 245/45R20 Tires
245/45R20 tires have a section width of 245 millimeters (mm), an aspect ratio of 45%, radial construction, and a 20-inch wheel diameter. The 275/40r20 tire size has an overall diameter of 28.7 inches and fits within a 7.5’’-9.0’’ rim width range, making it a common fitment for electric performance sedans and performance-oriented crossovers/SUVs.
245/45R20 Size Quick Specs
- Overall diameter/total height: 28.7 in
- Sidewall height: 4.3 in
- Section width: 245 mm
- Rim width range: 7.5-9.0 in
- Wheel diameter: 20 in
245/45r20 Tire Size In Inches
A 245/45r20 tire has a section width of 9.65 inches (≈ 9.6") and a sidewall height of 4.34 inches (≈ 4.3").
The 245/45r20 diameter (OD) is 28.68 inches (≈ 28.7"), and the circumference is approximately 90.10 inches (≈ 90.1").
245/35/20 width is 9.65 inches (245 mm).
Common Vehicle Fitments for 245/45R20 Size
- Audi e-tron GT / RS e-tron GT (2022–2025, front axle, factory staggered setup)
- Porsche Taycan (2020–2025, front axle, factory staggered 20" wheel option)
- Ford Mustang Mach-E GT (2021–2025, factory 20" wheel fitment)
- BMW X4 (multiple trims including xDrive30i, M Sport, and M40i, front axle, factory staggered setup)
- Lexus LC500 / LC500h (2018–2025, front axle, factory staggered setup)
- Dodge Charger (SXT, GT, and select trims with factory 20" wheels)
- Dodge Challenger (SXT, R/T, and GT trims with factory 20" wheels)
- Cadillac XT4 (Sport and upper trims with factory 20" wheels)
- Buick Envision (2021–2025, Avenir and select trims with factory 20" wheels)
245/45r20 Tires For Sale
Well-regarded 245 45 20 tires include:
Toyo 245 45 r20: Toyo Celsius II, Toyo Proxes Sport A/S+
Budget UHP tires 245/35r20: Ironman iMove Gen2 A/S, Ironman iMove Gen 3 AS
245 45 r20 all season: Pirelli Cinturato P7 All Season, Continental ProContact RX
Comparison of 245/45R20 With Similar Tire Sizes
Comparing 275/40r20 vs 245/45r20 and 245/45R20 with 245/35R20 shows how changes in aspect ratio and wheel diameter affect overall diameter, ride comfort, handling response, and whether a swap is physically possible without changing wheels.
What Is the Difference Between 245/45R20 vs 245/35R20?
The main difference between 245/45R20 and 245/35R20 is the aspect ratio. Both tires fit 20-inch wheels, but the lower-profile 245/35R20 has a much shorter sidewall and a significantly smaller overall diameter.
The 245/45R20 has a sidewall height of 110.25 mm (≈ 4.34") and an overall diameter of 728.50 mm (≈ 28.68"). The 245/35R20 has a sidewall height of 85.75 mm (≈ 3.38") and an overall diameter of 679.50 mm (≈ 26.75").
This means the 245/35R20 sidewall is 24.50 mm (≈ 0.96") shorter, and the overall diameter is 49.00 mm (≈ 1.93") smaller.
245/45R20 vs 245/35R20 Tire Size Comparison Table
Tire Dimension | 245/45R20 (mm & in) | 245/35R20 (mm & in) | Difference (mm & in) | Percentage Difference |
Section Width | 245 mm (≈ 9.65") | 245 mm (≈ 9.65") | 0 | 0% (vs width) |
Sidewall Height | 110.25 mm (≈ 4.34") | 85.75 mm (≈ 3.38") | 24.50 mm (≈ 0.96") | ≈ 22.22% (vs sidewall) |
Overall Diameter | 728.50 mm (≈ 28.68") | 679.50 mm (≈ 26.75") | 49.00 mm (≈ 1.93") | ≈ 6.73% (vs diameter) |
Circumference | 2288.65 mm (≈ 90.10") | 2134.71 mm (≈ 84.04") | 153.94 mm (≈ 6.06") | ≈ 6.73% (vs diameter) |
Radius | 364.25 mm (≈ 14.34") | 339.75 mm (≈ 13.38") | 24.50 mm (≈ 0.96") | ≈ 6.73% (vs diameter) |
Rim Diameter | 20" | 20" | — | — |
Recommended Rim Width | 7.5–9.0" | 8.0–9.5" | — | — |
What Is the Difference Between 275/40r20 vs 245/45r20?
The 275/40r20 is a wider tire, while the 245/45r20 is narrower with a nearly identical overall diameter. Although the 245/45R20 is technically about 0.1 inches taller (28.7" vs 28.6"), the most significant difference is the 1.2-inch greater width of the 275/40R20. This wider footprint can improve dry-road grip and handling stability, while the narrower 245/45R20 may slightly reduce rolling resistance and can perform better in snow and slush when using proper winter tire compounds and tread designs.
FAQ
Can I Replace 245/45R20 With 255/45R20?
Can I fit 275 tires instead of 245?
Can I Use 245/35R20 Instead of 245/45R20?
Can I Use 245/45r20 Instead of 275/40R20?
Is 245/45R20 a “29-inch tire”?
What is the Difference Between 245/45r20 and 245/45zr20?
What Wheel Width Should I Run With 245/45R20?
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