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Tire Size Calculator — Compare & Convert
Decode tire size numbers. Compare two tire sizes for speedometer accuracy, clearance, and ride differences.
In this article
Reading
185/65 R15: 185mm width, 65% aspect ratio, Radial, 15" rim। Car manual: all allowed sizes। CEAT, MRF, Apollo, Bridgestone: top Indian tyre brands। MRF: most popular (Sachin Tendulkar endorsement!)।
When Replace
1.6mm tread: legal minimum। 3mm: recommended for monsoon safety। 5+ years old: replace regardless of tread (rubber degrades)।
⚡ CalcWolf Insight
Wider tires do NOT always improve grip. On wet or snowy roads, narrower tires often perform better because they concentrate weight over a smaller contact patch, cutting through water and snow more effectively. The optimal tire width depends on driving conditions, not just looks.
Frequently asked questions
Numbers meaning?▾
185/65 R15: 185mm wide, 65% profile, Radial, 15" rim।
When replace?▾
1.6mm legal min। 3mm for monsoon safety। 5+ years: replace。
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