Tyre Size Guide for India
Every tyre has a size code stamped on its sidewall — for example 185/65 R15 88H. This guide explains each part so you buy the right tyre for your car, bike, or SUV.
Understanding the Size Code
- 185 — Section width in millimetres
- 65 — Aspect ratio (sidewall is 65% of 185 mm)
- R — Radial construction
- 15 — Rim diameter in inches
- 88 — Load index (560 kg per tyre)
- H — Speed rating (up to 210 km/h)
Popular Car Tyre Sizes in India
155/70 R13165/70 R14175/65 R14175/70 R14185/60 R15185/65 R15195/55 R16195/65 R15205/55 R16205/65 R15205/60 R16215/60 R17
Frequently Asked Questions
What does 185/65 R15 mean on a tyre?
185 is tread width in mm, 65 is aspect ratio (sidewall height as % of width), R means radial construction, and 15 is rim diameter in inches.
Can I use a different tyre size than recommended?
Only within manufacturer-approved +/- 3% overall diameter. Wrong sizes affect speedometer accuracy, ABS calibration, and handling.
Where can I find my car's tyre size?
Check the sidewall of your current tyre, the driver's door jamb sticker, or your owner's manual. TyreRaja's vehicle finder also suggests OEM sizes.