275/45 R21 W (110)
275/45 R21 Y (110)
275/45 R21 Y (107)
The energy lost when a tyre is in motion is known as 'rolling resistance'. This
has a direct impact on fuel consumption.
A tyre's rolling resistance score ranges from A to G. Over the life of the tyre,
fitting an A rated tyre could save you up to 6 litres of fuel when compared to a
G rated tyre.
A tyre's wet grip capacity is expressed in Grades from A to G.
The difference in braking distances between each grade is roughly 3m - an average
car length. This makes average stopping distance between an A and G rated tyre 18m.
That's 4 car lengths.
The exterior noise grade of a tyre is expressed in decibels - accompanied by one,
two or three sound waves, with one wave being the best noise level performance.
To achieve the best grade, a tyre’s noise level must be at least 3dB under the legal
limit set by the EU.
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