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P255/50R20

Passenger / P-Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The P255/50R20 tire size features an overall diameter of 30.04 inches, a section width of 10.0 inches (255mm), and rotates 671 times per mile. It is a standard factory tire fitment on 81+ vehicle models including Cadillac SRX.

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Physical Dimensions & Specs

Overall Diameter

30.04"

763.0 mm

Section Width

255 mm

10.04" wide

Sidewall Height

5.02"

127.5 mm (50% aspect)

Revolutions / Mile

671

Circumference: 94.37"

Rim Diameter

20"

Wheel size

Recommended Rim Width

6.4" - 8.9"

Optimal rim width range

Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare P255/50R20 against any proposed tire size below:

Popular Comparisons:
Tire 1 (Stock / Base)255/50R20
Overall Height:30.0"
Sidewall:5.0"
Revs/Mile:671
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682

Visual Tire & Wheel Comparison

Tire 130.0" HeightTire 229.6" Height

Speedometer Variance

-1.5%At 60 mph reading, actual speed is 59.1 mph
IndicatedActual SpeedDiff
20 mph19.7 mph-0.3 mph
30 mph29.5 mph-0.5 mph
45 mph44.3 mph-0.7 mph
60 mph59.1 mph-0.9 mph
75 mph73.8 mph-1.2 mph
90 mph88.6 mph-1.4 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:-0.23" lower ground clearance

Vehicles That Fit P255/50R20 (81+ Models)

Factory standard and optional vehicle fitments utilizing P255/50R20 tires:

YearMake & ModelTrim / VariantLookup Specs
2007Cadillac SRX4.6 A, RWDView 2007 SRX ›
2007Cadillac SRX3.6 7, RWDView 2007 SRX ›
2007Cadillac SRX4.6 A, AWDView 2007 SRX ›
2007Cadillac SRX3.6 7, AWDView 2007 SRX ›
2008Cadillac SRX3.6 7, AWDView 2008 SRX ›
2008Cadillac SRX4.6 A, AWDView 2008 SRX ›
2009Cadillac SRX3.6 7, AWDView 2009 SRX ›
2009Cadillac SRX4.6 A, AWDView 2009 SRX ›
2006Chevrolet TrailBlazer6.0 H, AWDView 2006 TrailBlazer ›
2006Chevrolet TrailBlazer6.0 H, RWDView 2006 TrailBlazer ›
2007Chevrolet TrailBlazer6.0 H, RWDView 2007 TrailBlazer ›
2007Chevrolet TrailBlazer6.0 H, AWDView 2007 TrailBlazer ›
2008Chevrolet TrailBlazer6.0 H, AWDView 2008 TrailBlazer ›
2008Chevrolet TrailBlazer6.0 H, RWDView 2008 TrailBlazer ›
2009Chevrolet TrailBlazer6.0 H, AWDView 2009 TrailBlazer ›
2009Chevrolet TrailBlazer6.0 H, RWDView 2009 TrailBlazer ›
2009Ford Explorer4.0 E, 4WDView 2009 Explorer ›
2009Ford Explorer4.0 E, AWDView 2009 Explorer ›
2009Ford Explorer4.0 E, RWDView 2009 Explorer ›
2009Ford Explorer4.6 8, 4WDView 2009 Explorer ›
2009Ford Explorer4.6 8, AWDView 2009 Explorer ›
2009Ford Explorer4.6 8, RWDView 2009 Explorer ›
2009Ford Explorer Sport Trac4D Utility Pickup, 4.0 E, 4WDView 2009 Explorer Sport Trac ›
2009Ford Explorer Sport Trac4D Utility Pickup, 4.0 E, AWDView 2009 Explorer Sport Trac ›
2009Ford Explorer Sport Trac4D Utility Pickup, 4.6 8, 4WDView 2009 Explorer Sport Trac ›
2009Ford Explorer Sport Trac4D Utility Pickup, 4.6 8, AWDView 2009 Explorer Sport Trac ›
2010Ford Explorer4.0 E, 4WDView 2010 Explorer ›
2010Ford Explorer4.0 E, AWDView 2010 Explorer ›
2010Ford Explorer4.0 E, RWDView 2010 Explorer ›
2010Ford Explorer4.6 8, 4WDView 2010 Explorer ›
2010Ford Explorer4.6 8, AWDView 2010 Explorer ›
2010Ford Explorer4.6 8, RWDView 2010 Explorer ›
2011Ford ExplorerLimited, AWDView 2011 Explorer ›
2011Ford ExplorerLimited, FWDView 2011 Explorer ›
2012Ford ExplorerLimited, 3.5 8, AWDView 2012 Explorer ›
2012Ford ExplorerLimited, 2.0 9View 2012 Explorer ›
2012Ford ExplorerLimited, 3.5 8, FWDView 2012 Explorer ›
2013Ford ExplorerLimited, 2.0L Eng VIN 9View 2013 Explorer ›
2013Ford ExplorerLimited, 3.5L Eng VIN 8, AWD, GasView 2013 Explorer ›
2013Ford ExplorerLimited, 3.5L Eng VIN 8, FWD, GasView 2013 Explorer ›
2013Ford ExplorerSportView 2013 Explorer ›
2013Ford ExplorerLimited, 3.5L Eng VIN 8, FWD, Gas/EthanolView 2013 Explorer ›
2013Ford ExplorerLimited, 3.5L Eng VIN 8, AWD, Gas/EthanolView 2013 Explorer ›
2014Ford ExplorerLimited, 2.0L Eng VIN 9View 2014 Explorer ›
2014Ford ExplorerLimited, 3.5L Eng VIN 8, AWDView 2014 Explorer ›
2014Ford ExplorerLimited, 3.5L Eng VIN 8, FWDView 2014 Explorer ›
2014Ford ExplorerSportView 2014 Explorer ›
2015Ford ExplorerLimited, 2.0L Eng VIN 9View 2015 Explorer ›
2015Ford ExplorerLimited, 3.5L Eng VIN 8, AWDView 2015 Explorer ›
2015Ford ExplorerSportView 2015 Explorer ›
2015Ford ExplorerLimited, 3.5L Eng VIN 8, FWDView 2015 Explorer ›
2016Mazda CX-9Grand Touring, AWDView 2016 CX-9 ›
2016Mazda CX-9Grand Touring, FWDView 2016 CX-9 ›
2016Mazda CX-9SignatureView 2016 CX-9 ›
2017Mazda CX-9Grand Touring, AWDView 2017 CX-9 ›
2017Mazda CX-9Grand Touring, FWDView 2017 CX-9 ›
2017Mazda CX-9SignatureView 2017 CX-9 ›
2018Mazda CX-9Grand Touring, FWDView 2018 CX-9 ›
2018Mazda CX-9Grand Touring, AWDView 2018 CX-9 ›
2018Mazda CX-9SignatureView 2018 CX-9 ›
2019Mazda CX-9Grand Touring, AWDView 2019 CX-9 ›
2019Mazda CX-9Grand Touring, FWDView 2019 CX-9 ›
2019Mazda CX-9SignatureView 2019 CX-9 ›
2020Mazda CX-9Grand Touring, AWDView 2020 CX-9 ›
2020Mazda CX-9Grand Touring, FWDView 2020 CX-9 ›
2020Mazda CX-9SignatureView 2020 CX-9 ›
2021Mazda CX-9Carbon Edition, AWDView 2021 CX-9 ›
2021Mazda CX-9Carbon Edition, FWDView 2021 CX-9 ›
2021Mazda CX-9Grand Touring, AWDView 2021 CX-9 ›
2021Mazda CX-9Grand Touring, FWDView 2021 CX-9 ›
2021Mazda CX-9SignatureView 2021 CX-9 ›
2022Mazda CX-9Carbon EditionView 2022 CX-9 ›
2022Mazda CX-9Grand TouringView 2022 CX-9 ›
2022Mazda CX-9SignatureView 2022 CX-9 ›
2022Mazda CX-9Touring PlusView 2022 CX-9 ›
2023Mazda CX-9Carbon EditionView 2023 CX-9 ›
2023Mazda CX-9Grand TouringView 2023 CX-9 ›
2023Mazda CX-9SignatureView 2023 CX-9 ›
2023Mazda CX-9Touring PlusView 2023 CX-9 ›
2008Saab 9-7XAeroView 2008 9-7X ›
2009Saab 9-7XAeroView 2009 9-7X ›