Pilot Sport All Season 4

About the Michelin Pilot Sport All Season 4

All-Season Ultra High Performance Passenger Car tire.

Features

* Dynamic Response Technology* Asymmetric tread pattern* Distinctive full depth and interlocking sipes* Helio+ technology* Biting edges in the tread grooves* M+S Rated* 45,000 Mile/70,000 km Manufacturer's Treadwear Limited Warranty - Speed Rating: V, W, Y* 30,000 Mile/50,000 km Manufacturer's Treadwear Limited Warranty - Speed Rating: (Y)* Standard Manufacturer's Limited Warranty

Benefits

* Ensures forces and temperatures are distributed evenly for longer wear life* Places more rubber on the outer shoulder to deliver exceptional lateral grip* Provide biting edges for improved traction in wet and snowy conditions* Advanced rubber grips the road even in freezing conditions* Grab loose snow to help control acceleration and braking in winter conditions

Understanding the 255/40ZR21 XL size

In the size code 255/40R21, 255 is the section width in millimetres (about 10"). 40 is the aspect ratio — the sidewall height is 40% of the width, or roughly 102 mm. R21 means radial construction on a 21-inch wheel, giving an approximate overall diameter of 29".

The load index 102 means each tire supports up to 1,874 lbs — about 7,496 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.

What the Michelin Pilot Sport All Season 4 is built for

The Michelin Pilot Sport All Season 4 is an all-season tire, balancing dry grip, wet traction and tread life across spring, summer and autumn conditions. It carries an M+S (mud and snow) marking for light winter service. Fitment category: Passenger Car, Performance, UHP.

Tread life and grip ratings

This tire carries a UTQG rating of 540 AA A. The treadwear grade of 540 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 $341.24 per tire, a full set of four costs $1364.96. That sits close to the average for the 56 tires we stock in this size. Backed by a 45,000-mile treadwear warranty, that works out to roughly $30.33 per 1,000 miles across the set.