“205/55 R16 91V” is not just a tyre size. It is a compact technical description covering dimensions, construction, load capacity and speed capability. A workshop quotation that captures only “205/55 R16” may miss an important part of the required fitment.
205: nominal tyre width
The first number is the nominal section width in millimetres. In this example, the tyre is 205mm wide. It should not be treated as a standalone fitment decision because wheel width, vehicle clearance and the complete specification also matter.
55: aspect ratio
The second number expresses sidewall height as a percentage of tyre width. Here, the sidewall height is nominally 55% of 205mm. It is not a 55mm sidewall.
R: radial construction
R means radial construction. This describes how the tyre is built; it does not mean “rim”. Radial tyres are the normal construction for modern passenger vehicles.
16: rim diameter
The number after R is the wheel diameter in inches. A 16-inch tyre must be fitted to the correct 16-inch wheel diameter.
91: load index
The load index is a code corresponding to the maximum load a single tyre can carry under specified conditions. Michelin’s Malaysia guide shows that index 91 corresponds to 615kg per tyre when correctly inflated.
Tyres with the same dimensions can carry different load indices. Confirm the vehicle manufacturer’s requirement using the door placard, owner’s manual and dependable fitment data. Do not substitute a lower load index merely because the physical size matches.
V: speed rating
The final letter is the speed rating. V corresponds to a maximum rated speed of 240km/h under the defined load and operating conditions. This is a tyre capability code, not permission to exceed Malaysia’s speed limits.
What does XL mean?
XL means Extra Load. It identifies a reinforced tyre designed for a higher load capacity than a standard-load version of the same dimensions. For example, Michelin shows how 205/55 R16 94V XL has a higher load index than 205/55 R16 91V. Pressure requirements and vehicle compatibility still need to be confirmed.
Other sidewall markings workshops should notice
Continental’s marking guide identifies information such as brand, pattern, manufacturing date code, regulatory markings and original-equipment or run-flat symbols. Directional arrows, “Outside/Inside” mounting instructions and special construction markings can affect installation.
Can a workshop change the tyre size?
A different size can affect overall diameter, speedometer reading, clearance, handling and load capability. JPJ provides a form for alternative tyre-size applications, while its CTA information explains the standards framework for tyres. Do not assume a popular “plus-size” combination is automatically approved for every vehicle.
A five-point quotation check
- Confirm the exact vehicle, variant and year.
- Read the door placard and owner’s manual.
- Record full size, load index and speed rating.
- Check XL, run-flat, OE and mounting markings where relevant.
- Explain any alternative before taking the customer’s approval.
A correct tyre quotation starts with the vehicle specification—not with the cheapest product returned by a size search.
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