Home › Tire Sizes › P245/40R20

P245/40R20

Passenger / P-Metric

Factory Specs, Physical Dimensions & Compatible Vehicle Applications

Factory Spec Overview

The P245/40R20 tire size features an overall diameter of 27.72 inches, a section width of 9.6 inches (245mm), and rotates 728 times per mile. It is a standard factory tire fitment on 40+ vehicle models including Buick Cascada.

Shop P245/40R20 Tires on Tire Rack →Buy on Amazon →

Physical Dimensions & Specs

Overall Diameter

27.72"

704.1 mm

Section Width

245 mm

9.65" wide

Sidewall Height

3.86"

98.0 mm (40% aspect)

Revolutions / Mile

728

Circumference: 87.07"

Rim Diameter

20"

Wheel size

Recommended Rim Width

6.1" - 8.6"

Optimal rim width range

Where to Buy & Install P245/40R20 Tires

Looking for P245/40R20 tires? Skip hauling tires in your car—choose direct delivery to a local certified shop or doorstep delivery:

⭐ Recommended · Ship to Local Shop

Tire Rack

Free shipping directly to over 10,000+ certified local installers.

  • ✓Delivered to local installer (Firestone, Discount Tire & local shops)
  • ✓Mobile installation available — mount & balance right in your driveway
  • ✓Free 2-year road hazard warranty on most eligible tire models
🏎️Find P245/40R20 on Tire Rack (Local Install) →
Direct Home Delivery

Amazon Automotive

Fast doorstep shipping for DIYers or bringing to your own shop.

  • ✓Prime doorstep shipping for home garages or spares
  • ✓Huge range of budget and specialty tire sizes in stock
  • ✓Ideal if you have a local independent mechanic you prefer
🛒Shop P245/40R20 on Amazon →

As an affiliate for Tire Rack and Amazon, we earn from qualifying purchases at no extra cost to you.

Speedometer & Alternate Size Calculator

Testing an alternate size for your vehicle? Compare P245/40R20 against any proposed tire size below:

Popular Comparisons:
Tire 1 (Stock / Base)245/40R20
Overall Height:27.7"
Sidewall:3.9"
Revs/Mile:728
Tire 2 (New / Compare)245/60R18
Overall Height:29.6"
Sidewall:5.8"
Revs/Mile:682

Visual Tire & Wheel Comparison

Tire 127.7" HeightTire 229.6" Height

Speedometer Variance

+6.7%At 60 mph reading, actual speed is 64.0 mph
IndicatedActual SpeedDiff
20 mph21.3 mph+1.3 mph
30 mph32.0 mph+2.0 mph
45 mph48.0 mph+3.0 mph
60 mph64.0 mph+4.0 mph
75 mph80.0 mph+5.0 mph
90 mph96.0 mph+6.0 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:+0.93" ground clearance

Vehicles That Fit P245/40R20 (40+ Models)

Factory standard and optional vehicle fitments utilizing P245/40R20 tires:

YearMake & ModelTrim / VariantLookup Specs
2016Buick CascadaPremiumView 2016 Cascada ›
2016Buick CascadaBaseView 2016 Cascada ›
2017Buick CascadaBaseView 2017 Cascada ›
2017Buick CascadaPremiumView 2017 Cascada ›
2017Buick CascadaSport TouringView 2017 Cascada ›
2018Buick CascadaBaseView 2018 Cascada ›
2018Buick CascadaPremiumView 2018 Cascada ›
2018Buick CascadaSport TouringView 2018 Cascada ›
2019Buick CascadaBaseView 2019 Cascada ›
2019Buick CascadaPremiumView 2019 Cascada ›
2019Buick CascadaSport TouringView 2019 Cascada ›
2013Cadillac XTSAWDView 2013 XTS ›
2013Cadillac XTSFWD, Trans Mfr CD 6T70/M7WView 2013 XTS ›
2013Cadillac XTSFWD, Trans Mfr CD 6T75/M7VView 2013 XTS ›
2014Cadillac XTSPlatinum, AWDView 2014 XTS ›
2014Cadillac XTSPlatinum, FWDView 2014 XTS ›
2014Cadillac XTSVsport PlatinumView 2014 XTS ›
2014Cadillac XTSVsport PremiumView 2014 XTS ›
2015Cadillac XTSPlatinum, FWDView 2015 XTS ›
2015Cadillac XTSPlatinum, AWDView 2015 XTS ›
2015Cadillac XTSVsport PlatinumView 2015 XTS ›
2015Cadillac XTSVsport PremiumView 2015 XTS ›
2016Cadillac XTSPlatinum, FWDView 2016 XTS ›
2016Cadillac XTSPlatinum, AWDView 2016 XTS ›
2016Cadillac XTSVsport PlatinumView 2016 XTS ›
2016Cadillac XTSVsport PremiumView 2016 XTS ›
2017Cadillac XTSPlatinum, AWDView 2017 XTS ›
2017Cadillac XTSPlatinum, FWDView 2017 XTS ›
2017Cadillac XTSVsport PlatinumView 2017 XTS ›
2017Cadillac XTSVsport Premium LuxuryView 2017 XTS ›
2018Cadillac XTSPlatinum, AWDView 2018 XTS ›
2018Cadillac XTSPlatinum, FWDView 2018 XTS ›
2018Cadillac XTSPremium Luxury, AWDView 2018 XTS ›
2018Cadillac XTSPremium Luxury, FWDView 2018 XTS ›
2018Cadillac XTSVsport PlatinumView 2018 XTS ›
2019Cadillac XTSPlatinum, AWDView 2019 XTS ›
2019Cadillac XTSPlatinum, FWDView 2019 XTS ›
2019Cadillac XTSPremium Luxury, AWDView 2019 XTS ›
2019Cadillac XTSPremium Luxury, FWDView 2019 XTS ›
2019Cadillac XTSVsport PlatinumView 2019 XTS ›