Lupo 3L tyres

[bjn]

Originally Posted by RPM

The energy efficiency rating in the EU tyre label is a function of the Rolling Resistance Coefficient (RRC), defined in the attached table.

Source: http://eur-lex.europa.eu/legal-conte...9R1222&from=EN

Thank you, very interesting.

In other words, any tire with an A-label should be better than the 145/80-14 B381? or are they underspecified?

[RPM]

In principle yes, an A-labeled tire will have a lower rolling resistance than a C-labeled tire.

However, there is something else that should be taken into account: these labels are self-reported. Given that manufacturers have an incentive to make their tires look good, I wonder if some of them lie or try to cheat in some subtle way...