Home/245/45R20
Size reference
245/45R20: what fits & what to buy
The workhorse 20-inch size: factory on the Charger and Challenger Scat Pack (as 245/45ZR20), the 20-inch option on R/T and SXT, and the front half of the classic Mopar stagger.
245 = tread width in millimetres · 45 = sidewall height as a percentage of that width · R20 = radial construction on a 20-inch wheel. Two sizes with the same overall diameter are speedometer-compatible, that is the whole game in staggering.
What runs this size
Dodge Charger & Challenger Scat Pack (factory square), Charger/Challenger R/T and SXT with the 20-inch wheel option, Chrysler 300S, and the front in the popular 245/45R20 + 275/40R20 stagger. Full chart: Charger sizes.
Pairing this size front-to-rear? Run it through the stagger calculator before you order.
The picks
The benchmark in this size: grip, wet safety, and wear that beats the other max-performance options.
The do-everything answer for daily-driven V8s in rain country.
The most tire per dollar in the size, no shame in it.
Always confirm against the tire placard on your driver-side door jamb and your actual wheel widths before ordering. Fitments here cover common factory and community setups. Years and packages vary.
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Good to know
245/45R20 vs 245/45ZR20? The Z marks a higher speed rating; on a Scat Pack, buy the ZR/(Y)-rated versions. Same physical size, same fit.
Wheel width window: 7.5–9.5 inches, happiest on 8–8.5. Pairs with: 275/40R20 rear in the standard stagger (diameters within 0.4%).
// Sources & further reading
- Your vehicle’s tire placard (driver-side door jamb) & owner’s manual · The legally required OEM fitment record on every car, always the first authority.
- Michelin tire size listings & product data sheets · Manufacturer-published sizes and approved rim widths per tire model.
- Continental tire knowledge: rim/tire combinations (ETRTO) · How approved rim-width ranges are defined under industry standards.
- Tire and Rim Association (T&RA) standards · The US standards body whose yearbook defines size/rim pairing norms.
How we compile and verify fitment data: our methodology. Spot an error? fitment@staggeredsetup.com. Corrections ship fast.