Vittoria Gravel Tires get "Terrain Scores" and New Naming
Briefly

Now, they're all going to be the Terreno, with a revamped naming system that tacks on two extra bits of info to describe both the type and severity of the terrain they're intended for.
The 'T' rating system ranges from 0 (smooth asphalt) to 100 (extreme terrain), with T50 indicating suitability for normal gravel roads with some obstacles like washboards, potholes, and rocks.
Read at Bikerumor
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