Plus-Size Tire Calculator: +1, +2 & +3 Rim Upgrades
Upgrading to bigger wheels? Find the exact lower aspect ratio tire that maintains your factory rolling diameter within factory tolerances.
Compatible Low-Profile Tire Options:
What is Plus-1?
Plus-1 increases wheel diameter by 1 inch (e.g. 16" to 17") while lowering the sidewall aspect ratio (e.g. 55 to 45). The overall tire height stays identical, maintaining your speedometer calibration while improving cornering responsiveness.
What is Plus-2?
Plus-2 goes up 2 inches in rim diameter (e.g. 16" to 18"). The tire sidewall becomes noticeably thinner (aspect ratio 40 or 35). This gives an aggressive sporty aesthetic and sharp steering feedback, with slightly firmer ride quality over potholes.
Load Capacity Safety
When reducing tire sidewall height, always ensure the new tire's Load Index meets or exceeds your vehicle's factory OEM specification to avoid blowout risks under heavy passenger or cargo loading.