L5 Tread Code
L
Service category — which machineLoader and dozer
Wheel loaders and dozers working a face: short cycles, sharp material, and sidewalls up against a muck pile.
5
Tread type and depthExtra Deep Tread
Roughly two and a half times a regular tread. The most protection in the series and the most heat — which is why an extra-deep tyre on a long haul is a tyre being cooked.
ETRTO
The same code under the other standardExtra Deep Tread
ETRTO Standards Manual 2026 lists L-5 as a extra deep tread. Using these codes at all is left to the individual tyre maker, so a tyre may be marked to ETRTO, to TRA, or to neither.
TKPH
What the code does not tell youNothing about load, or heat
A tread code says which machine and how much rubber. What the tyre can carry comes from its star rating, and whether it survives the haul comes from TKPH — the load and speed it can work at without overheating. A deep tread on a long, fast cycle is a tyre being cooked.
Standardised by ETRTO or TRA.