Pirelli PIR P4 Persist AS Plus 225/55R17

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What 225/55R17 means

In the size 225/55R17, 225 is the section width in millimeters (8.86 in), 55 is the aspect ratio — the sidewall stands 55% as tall as the tire is wide, or 123.8 mm (4.87 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 26.74 inches, turning roughly 754 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.

The manufacturer lists the overall diameter of this specific tire as 17 inches — when clearance is tight, go by the published figure rather than the nominal size math.

The service description on this tire decodes to a load index of 97 — a maximum load of 1,609 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.

Specifications

Frequently asked questions

What are the treadwear and warranty ratings on the Pirelli P4 Persist AS Plus?

This tire carries a treadwear grade of 820, traction grade A, temperature grade A under UTQG. The manufacturer's warranty is 85K.

What does 97T mean on the Pirelli P4 Persist AS Plus?

97T breaks down as load index 97 — rated for 1,609 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.

What kind of tire is the Pirelli P4 Persist AS Plus?

The Pirelli P4 Persist AS Plus in 225/55R17 is a touring tire.

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