Motorcycle Tyre Size Calc 4+

Motorcycle Tyre Code Explain

Heng Jia Liang

Designed for iPad

    • $2.99



Motorcycle Tyre Size Calculator are used to find Tyre width, Aspect ratio, Construction type, Rim diameter, Speed rating and Load index of Motorcycle Tyre.

• Instant calculation.
• Result is copying abilities to another app.
• Reference are included.
• Support for Dark Mode.
• Tiny app that conserves storage space.
• Work offline.

Motorcycle Tyre Size Designations:
The motorcycle Tyre Code can be found on the tyre's sidewall with information about tyre:
- Tyre width in mm.
- Aspect ratio – ratio of height to width.
- Rim diameter.
- Construction type.
- Load index - Maximum load capacity.
- Speed rating - Maximum allowed speed.

Same as four-wheeled vehicles, Tyres for motorcycle have a tyre code, which describes a tyre's width, height/width aspect ratio, wheel diameter, load index and speed rating.

The most common code example are:
190/50 R 17 M/C (73 W)

- 3 digit number: The "nominal section width" of the tyre in millimeter, the widest point from both outer edges.
- / Slash character for character separation.
- 2 or 3 digit number: The "aspect ratio" of the sidewall height to the total width of the tyre, as a percentage.
- An optional letter indicating construction of the fabric carcass of the tyre:
B: bias belt (where the sidewalls are the same material as the tread, leading to a rigid ride)
D: diagonal
R: radial
-: cross ply tyre
- 2 digit number: Diameter in inches of the wheel that the tyre is designed to fit.
- M/C: Motorcycle Tyre
- 2 or 3 digit number: Load index
- 1 or 2 digit/letter combo: Speed rating

This App works in both portrait and landscape mode on the iPad, and portrait mode on iPhone.
The App also add support for Dark Mode.
This App is a tiny app that conserves storage space and also work offline.

Thanks for your support and do visit for more apps for your iOS devices.

App Privacy

The developer, Heng Jia Liang, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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