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275/45R21

Standard Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The 275/45R21 tire size features an overall diameter of 30.74 inches, a section width of 10.8 inches (275mm), and rotates 656 times per mile. It is a standard factory tire fitment on 150+ vehicle models including Chevrolet Blazer EV.

Shop 275/45R21 Tires on Tire Rack →Buy on Amazon →

Physical Dimensions & Specs

Overall Diameter

30.74"

780.8 mm

Section Width

275 mm

10.83" wide

Sidewall Height

4.87"

123.7 mm (45% aspect)

Revolutions / Mile

656

Circumference: 96.59"

Rim Diameter

21"

Wheel size

Recommended Rim Width

6.9" - 9.6"

Optimal rim width range

Where to Buy & Install 275/45R21 Tires

Looking for 275/45R21 tires? Skip hauling tires in your car—choose direct delivery to a local certified shop or doorstep delivery:

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Direct Home Delivery

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Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare 275/45R21 against any proposed tire size below:

Popular Comparisons:
Tire 1 (Stock / Base)275/45R21
Overall Height:30.7"
Sidewall:4.9"
Revs/Mile:656
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682

Visual Tire & Wheel Comparison

Tire 130.7" HeightTire 229.6" Height

Speedometer Variance

-3.8%At 60 mph reading, actual speed is 57.7 mph
IndicatedActual SpeedDiff
20 mph19.2 mph-0.8 mph
30 mph28.9 mph-1.1 mph
45 mph43.3 mph-1.7 mph
60 mph57.7 mph-2.3 mph
75 mph72.1 mph-2.9 mph
90 mph86.6 mph-3.4 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:-0.58" lower ground clearance

Vehicles That Fit 275/45R21 (150+ Models)

Factory standard and optional vehicle fitments utilizing 275/45R21 tires:

YearMake & ModelTrim / VariantLookup Specs
2024Chevrolet Blazer EVRS, AWDView 2024 Blazer EV ›
2024Chevrolet Blazer EVRS, RWDView 2024 Blazer EV ›
2025Chevrolet Blazer EVRS, AWDView 2025 Blazer EV ›
2025Chevrolet Blazer EVRS, RWDView 2025 Blazer EV ›
2021Ford ExplorerPlatinum Hybrid, 4WDView 2021 Explorer ›
2021Ford ExplorerPlatinum Hybrid, RWDView 2021 Explorer ›
2021Ford ExplorerPlatinum, 4WDView 2021 Explorer ›
2021Ford ExplorerPlatinum, RWDView 2021 Explorer ›
2022Ford ExplorerPlatinum, 4WDView 2022 Explorer ›
2022Ford ExplorerPlatinum Hybrid, 4WDView 2022 Explorer ›
2022Ford ExplorerPlatinum, RWDView 2022 Explorer ›
2022Ford ExplorerPlatinum Hybrid, RWDView 2022 Explorer ›
2023Ford ExplorerPlatinum, 4WDView 2023 Explorer ›
2023Ford ExplorerPlatinum Hybrid, 4WDView 2023 Explorer ›
2023Ford ExplorerPlatinum Hybrid, RWDView 2023 Explorer ›
2023Ford ExplorerPlatinum, RWDView 2023 Explorer ›
2024Ford ExplorerPlatinum, 4WDView 2024 Explorer ›
2024Ford ExplorerPlatinum, RWDView 2024 Explorer ›
2024Ford ExplorerST, 4WDView 2024 Explorer ›
2024Ford ExplorerST, RWDView 2024 Explorer ›
2025Ford ExplorerPlatinum, 2.3L Eng VIN H, 4WDView 2025 Explorer ›
2025Ford ExplorerPlatinum, 2.3L Eng VIN H, RWDView 2025 Explorer ›
2025Ford ExplorerPlatinum, 3.0L Eng VIN C, 4WDView 2025 Explorer ›
2025Ford ExplorerPlatinum, 3.0L Eng VIN C, RWDView 2025 Explorer ›
2025Ford ExplorerST, 4WDView 2025 Explorer ›
2025Ford ExplorerST, RWDView 2025 Explorer ›
2025Ford ExplorerST-Line, 4WDView 2025 Explorer ›
2025Ford ExplorerST-Line, RWDView 2025 Explorer ›
2024Honda PrologueEliteView 2024 Prologue ›
2025Honda PrologueEliteView 2025 Prologue ›
2021Jeep Grand Cherokee LSummit Reserve, 3.6L Eng VIN GView 2021 Grand Cherokee L ›
2022Jeep Grand CherokeeSummit Reserve, 5.7L Eng VIN TView 2022 Grand Cherokee ›
2022Jeep Grand CherokeeSummit Reserve 4xeView 2022 Grand Cherokee ›
2022Jeep Grand CherokeeSummit Reserve, 3.6L Eng VIN GView 2022 Grand Cherokee ›
2022Jeep Grand Cherokee LSummit Reserve, 3.6L Eng VIN GView 2022 Grand Cherokee L ›
2022Jeep Grand Cherokee LSummit Reserve, 5.7L Eng VIN TView 2022 Grand Cherokee L ›
2023Jeep Grand CherokeeSummit Reserve, 3.6L Eng VIN GView 2023 Grand Cherokee ›
2023Jeep Grand CherokeeSummit Reserve, 5.7L Eng VIN TView 2023 Grand Cherokee ›
2023Jeep Grand CherokeeSummit Reserve 4xeView 2023 Grand Cherokee ›
2023Jeep Grand Cherokee LSummit Reserve, 3.6L Eng VIN GView 2023 Grand Cherokee L ›
2023Jeep Grand Cherokee LSummit Reserve, 5.7L Eng VIN TView 2023 Grand Cherokee L ›
2024Jeep Grand CherokeeSummit Reserve 4xeView 2024 Grand Cherokee ›
2024Jeep Grand CherokeeSummit ReserveView 2024 Grand Cherokee ›
2024Jeep Grand Cherokee LSummit Reserve, 5.7L Eng VIN TView 2024 Grand Cherokee L ›
2024Jeep Grand Cherokee LSummit, 3.6L Eng VIN GView 2024 Grand Cherokee L ›
2024Jeep Grand Cherokee LSummit, 5.7L Eng VIN TView 2024 Grand Cherokee L ›
2024Jeep Grand Cherokee LSummit Reserve, 3.6L Eng VIN GView 2024 Grand Cherokee L ›
2025Jeep Grand CherokeeSummit ReserveView 2025 Grand Cherokee ›
2025Jeep Grand CherokeeSummit Reserve 4xeView 2025 Grand Cherokee ›
2025Jeep Grand CherokeeSummit 4xeView 2025 Grand Cherokee ›
2025Jeep Grand CherokeeSummitView 2025 Grand Cherokee ›
2025Jeep Grand Cherokee LSummit ReserveView 2025 Grand Cherokee L ›
2025Jeep Grand Cherokee LSummitView 2025 Grand Cherokee L ›
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2018Land Rover Range Rover SportHSE DynamicView 2018 Range Rover Sport ›
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2018Land Rover Range Rover SportSVRView 2018 Range Rover Sport ›
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2020Land Rover Range Rover SportHSTView 2020 Range Rover Sport ›
2020Land Rover Range Rover SportSVRView 2020 Range Rover Sport ›
2021Land Rover Range RoverAutobiography, 2.0L Eng VIN YView 2021 Range Rover ›
2021Land Rover Range RoverAutobiography, 5.0L Eng VIN EView 2021 Range Rover ›
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2021Land Rover Range Rover SportSVRView 2021 Range Rover Sport ›
2022Land Rover Range RoverAutobiography, 4.4L Eng VIN 7View 2022 Range Rover ›
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2022Land Rover Range Rover SportHSE DynamicView 2022 Range Rover Sport ›
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2022Land Rover Range Rover SportHSTView 2022 Range Rover Sport ›
2022Land Rover Range Rover SportSVRView 2022 Range Rover Sport ›
2024Land Rover DiscoveryDynamic SE, 3.0L Eng VIN UView 2024 Discovery ›
2024Land Rover DiscoveryDynamic SE, 2.0L Eng VIN XView 2024 Discovery ›
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2023Lincoln AviatorBlack Label Grand TouringView 2023 Aviator ›
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2025Lincoln AviatorPremiere, AWDView 2025 Aviator ›
2025Lincoln AviatorPremiere, RWDView 2025 Aviator ›
2025Lincoln AviatorReserve, RWDView 2025 Aviator ›
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2021Mercedes-Benz GLE63 S AMG4D UtilityView 2021 GLE63 S AMG ›
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