Truck & Bus Tyres

295width/80aspectRradial22.5rim154/149load indexMspeed

295 — section width

Width of the tyre in millimetres, sidewall to sidewall.

80 — aspect ratio

Sidewall height as a percentage of the width (80% of 295 mm ≈ 236 mm).

R — construction

Radial construction. “ZR” marks tyres rated above 240 km/h; “RF” in place of “R” (for example 205/55 RF16) marks a run-flat tyre.

22.5 — rim diameter

Wheel rim diameter in inches.

154/149 — load index

Maximum load per tyre at the specified pressure: the first figure applies to single fitment, the second to twin (dual) fitment; 154 = 3,750 kg per tyre in single fitment. “XL” (extra load) or “RF” (reinforced) after the size marks a higher-load version.

M — speed rating

Maximum speed at the rated load: M = 130 km/h. A service description in brackets, such as (98Y), means the tyre is rated above 300 km/h.

Other markings: 3PMSF (three-peak mountain snowflake) — the tyre meets the EU/UN severe-snow performance test; M+S — mud and snow tread design (no test required); DOT — manufacturing code whose last four digits give the production week and year (for example 2325 = week 23 of 2025); EU tyre label — fuel-efficiency class (A–E), wet-grip class (A–E) and external rolling noise (dB and class A–C) under Regulation (EU) 2020/740.