Pirelli

Pzero (PZ4)

Name: Pirelli Pzero (PZ4) 255/50R21 XL
Brand: Pirelli
SKU: 3743800
Price: 347.98 USD
Availability: InStock

255/50R21 XL

$347.98/tire $463.97

Set of 4: $1391.92

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Specifications

Size	255/50R21 XL Pzero (PZ4 Sport) (*) NCS ELT
Width	255 mm
Aspect ratio	50
Rim diameter	R21
Load index	109
Speed rating	Y
Load range	XL

UTQG	280 AA A
Tread depth	8/32"
Weight	32.87 lbs
Max pressure	50 psi
Severe snow (3PMSF)	No
Run-flat	No

About the Pirelli Pzero (PZ4)

Summer Passenger Car/SUV Sport Performance tire. Chosen as Original Equipment for the most Performance Oriented and Powerful Models on the Market.

Features

* Asymmetric tread pattern* Three wide longitudinal grooves* S-shaped tread design* Three solid central ribs* Pirelli Noise Cancelling System™ (NCS) - select items only* Pirelli Seal Inside™ (S-I) puncture proof technology - select items only

Benefits

* Improves braking performance and enhances handling and control* Faster water expulsion for an improved safety and control in potential aquaplaning situations* Optimal pressure distribution for safety under critical braking conditions, on straight and through corners* Improved braking and traction also at high speed thanks to an increased pattern stiffness with optimized and constant area* Significantly reduces noise inside the vehicle - select items only* Allows you to drive on without losing air pressure even after the tire has been punctured by an external object - select items only

Understanding the 255/50R21 XL size

In the size code 255/50R21, 255 is the section width in millimetres (about 10"). 50 is the aspect ratio — the sidewall height is 50% of the width, or roughly 127.5 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 31".

The load index 109 means each tire supports up to 2,271 lbs — about 9,084 lbs across a full set of four. The speed symbol Y certifies the tire to 186 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.

Tread life and grip ratings

This tire carries a UTQG rating of 280 AA A. The treadwear grade of 280 is a relative durability score — a grade of 200 is expected to last roughly twice as long as a grade of 100 under the same controlled test. Traction grade AA measures straight-line wet stopping grip (AA is highest, then A, B and C). Temperature grade A reflects heat resistance at sustained speed (A is highest).

Price and value

At $347.98 per tire, a full set of four costs $1391.92. That sits close to the average for the 8 tires we stock in this size.

Frequently asked questions

What does the tire size 255/50R21 mean?

255 is the section width in millimetres, 50 is the aspect ratio (sidewall height as a percentage of width, about 127.5 mm), and R21 indicates radial construction for a 21-inch wheel. Overall diameter is approximately 31 inches.

What are the load and speed ratings of the Pirelli Pzero (PZ4) 255/50R21 XL?

Its load index of 109 allows up to 2,271 lbs per tire. Its speed rating of Y is certified to 186 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.

How much does a set of 4 Pirelli Pzero (PZ4) 255/50R21 XL tires cost?

A single tire is $347.98 and a set of four is $1391.92.

Does the Pzero (PZ4) come in other sizes?

Yes — we stock 494 additional Pzero (PZ4) sizes besides 255/50R21 XL. Fit only a size approved for your vehicle.