Tire & Wheel Size Comparison Calculator
Compare tire sizes, wheel fitment, offset, diameter and speedometer difference instantly — with a visual side-by-side and a verdict you can trust.
Current Tire
New Tire
Ground line · scaled comparison
Excellent Fit
Within ±3% — safe for daily driving
Diameter change
+2.4 mm
0.38%
Speedometer at 100
100.4 km/h
+0.38% error
Ground clearance
+1.2 mm
ride height delta
Sidewall change
-11.5 mm
revs/km: 501.8
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Popular calculators
Specialised tools for safe tire and wheel changes.
Tire database
Popular tire sizes
Quick links to the most-searched OEM and aftermarket fitments.
145/70 R13
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155/70 R13
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155/80 R13
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165/70 R13
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175/70 R13
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165/65 R14
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165/70 R14
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175/65 R14
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175/70 R14
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185/60 R14
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185/65 R14
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185/70 R14
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195/60 R14
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175/65 R15
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185/55 R15
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185/60 R15
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185/65 R15
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195/50 R15
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195/55 R15
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195/60 R15
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195/65 R15
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205/60 R15
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205/65 R15
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205/70 R15
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215/65 R15
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215/70 R15
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195/50 R16
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195/55 R16
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195/60 R16
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205/45 R16
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205/50 R16
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205/55 R16
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205/60 R16
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215/50 R16
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215/55 R16
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215/60 R16
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215/65 R16
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225/50 R16
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225/55 R16
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225/60 R16
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235/60 R16
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235/65 R16
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245/70 R16
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205/40 R17
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205/45 R17
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205/50 R17
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215/40 R17
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215/45 R17
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215/50 R17
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215/55 R17
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215/60 R17
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225/45 R17
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225/50 R17
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225/55 R17
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225/60 R17
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225/65 R17
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235/45 R17
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235/55 R17
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235/65 R17
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245/40 R17
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245/45 R17
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245/65 R17
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255/40 R17
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215/40 R18
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215/45 R18
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225/40 R18
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225/45 R18
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225/50 R18
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225/55 R18
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235/40 R18
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235/45 R18
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235/50 R18
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235/55 R18
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235/60 R18
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245/35 R18
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245/40 R18
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245/45 R18
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245/60 R18
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255/35 R18
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255/40 R18
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255/45 R18
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255/55 R18
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265/40 R18
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265/60 R18
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275/35 R18
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275/40 R18
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285/60 R18
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225/35 R19
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225/40 R19
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225/45 R19
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235/35 R19
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235/40 R19
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235/55 R19
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245/35 R19
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245/40 R19
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245/45 R19
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255/35 R19
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255/40 R19
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255/45 R19
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255/50 R19
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265/35 R19
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275/35 R19
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275/40 R19
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285/35 R19
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245/35 R20
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245/40 R20
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245/45 R20
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255/35 R20
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255/45 R20
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255/50 R20
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265/35 R20
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265/40 R20
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265/50 R20
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275/35 R20
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275/40 R20
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275/45 R20
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285/30 R20
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285/35 R20
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295/35 R20
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295/40 R20
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305/30 R20
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255/35 R21
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265/40 R21
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275/35 R21
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285/35 R21
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295/35 R21
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265/35 R22
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275/35 R22
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275/40 R22
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285/35 R22
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285/45 R22
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295/30 R22
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305/40 R22
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315/30 R22
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OEM fitments
Popular vehicle fitments
Recommended sizes and plus-size upgrades for common platforms.
BMW
3 Series
1998–2006
BMW
3 Series
2005–2012
BMW
3 Series
2012–2019
Mercedes-Benz
C-Class
2000–2007
Mercedes-Benz
E-Class
2002–2009
Mercedes-Benz
E-Class
2009–2016
Audi
A4
2000–2005
Audi
A4
2008–2015
Audi
A6
2004–2011
Volkswagen
Golf
2003–2009
Volkswagen
Golf
2008–2013
Volkswagen
Golf
2012–2019
Volkswagen
Passat
2005–2010
Volkswagen
Passat
2010–2015
Volkswagen
Passat
2014–2022
Skoda
Octavia
2004–2013
Skoda
Octavia
2013–2020
Toyota
Camry
2006–2011
Toyota
Camry
2011–2017
Toyota
Corolla
2006–2013
Toyota
RAV4
2012–2018
Honda
Civic
2005–2011
Honda
Accord
2008–2012
Ford
Focus
2004–2011
Ford
Focus
2010–2018
Opel
Astra
2004–2014
Opel
Astra
2009–2015
Renault
Mégane
2008–2016
Dacia
Duster
2010–present
Hyundai
Tucson
2015–2020
Knowledge base
Fitment guides & blog
Everything you need to know about plus-sizing, offset and safety.
Guide
How Speedometer Error Is Calculated
When you change tire size, your speedometer reading drifts. Here is exactly how the math works.
Read article
Guide
Wheel Offset & Backspacing Explained
ET, offset, backspacing — the difference between a perfect fitment and rubbing.
Read article
Guide
What Tire Size Difference Is Acceptable?
The 3% rule that pros use when plus-sizing or downsizing tires.
Read article
Guide
Can Bigger Wheels Damage Your Suspension?
What plus-sizing does to ride quality, bearings, and bushings.
Read article
Guide
Tire Pressure Explained: PSI, Load and Tire Size Changes
What PSI really means, why the door placard matters more than any online calculator, and how a tire size change can shift the right pressure.
Read article
Guide
Tire Load Index Explained: How Much Weight Can a Tire Carry?
Decode the number after your tire size — what kg per tire it represents, how it relates to speed rating, and why you must never go below the OEM rating.
Read article
Guide
Wheel Offset vs Backspacing: What Is the Difference?
Two ways of describing the same wheel geometry. Here is how offset (ET) and backspacing relate, when each is used, and how to convert between them.
Read article
Guide
Plus-Sizing Guide: How to Upgrade Wheel Size Safely
Plus-one and plus-two upgrades done right — keeping rolling diameter constant, picking the right tire width and offset, and knowing the comfort tradeoffs.
Read article
By rim diameter
Browse tire sizes by wheel size
Jump straight to every catalogued size for a given rim.
Popular comparisons
Common upgrade paths
Five frequently-searched plus-size comparisons.