Pirelli 245/40 R21 100Y Runflat P Zero PZ4 * 2024

The Pirelli P Zero PZ4 245/40 R21 100Y Runflat * is a high-performance summer tyre developed for premium vehicles where precise steering, strong braking and high-speed stability matter. This XL-rated version uses Pirelli Run Flat technology and carries the BMW star (*) homologation, making it a specialised fitment rather than a generic P Zero replacement.

Performance and Tread Design

The P Zero PZ4 uses an asymmetric performance tread with separate inner and outer tread characteristics. Pirelli combines a high-silica compound with a customised inner tread design for wet performance and traction, while the outer section uses a low-pitch sequence and siping design intended to reduce noise and rolling resistance. The result is a tyre focused on controlled responses rather than soft, comfort-first driving.

Road Behaviour and Driving Character

On dry roads, the 245/40 R21 profile and 100Y XL construction give the tyre a firm, responsive character that suits powerful premium cars. Steering inputs are designed to feel direct, particularly during faster cornering and lane changes. In wet conditions, the PZ4 is rated A for wet grip, while its performance-oriented compound and tread design are intended to maintain braking and traction when the road surface is less predictable.

Run Flat Technology

The Run Flat construction is one of the most important characteristics of this particular P Zero PZ4 specification. Pirelli states that its Run Flat technology helps maintain vehicle control after a loss of tyre pressure and can allow continued driving for up to 80 km at a maximum of 80 km/h after a puncture, subject to the applicable conditions. This is particularly useful for vehicles designed around run-flat equipment and eliminates the immediate need to stop for a conventional spare-wheel change.

Who Should Choose This Tyre?

This Pirelli is best suited to drivers who prioritise high-speed stability, steering response, wet braking and the additional security of Run Flat technology. The BMW star marking is also important because it identifies the tyre as an approved original-equipment specification. Drivers seeking a softer ride, lower purchase cost or a more comfort-oriented touring tyre may find a less performance-focused model more suitable.

Why This Size Matters

The 245/40 R21 100Y specification combines a 21-inch rim with an XL load version and Y speed rating, supporting loads of up to 800 kg per tyre and speeds up to 300 km/h. Because this is a BMW-marked Run Flat specification, buyers should match the tyre with the vehicle manufacturer's approved size, load and homologation requirements rather than selecting solely by dimensions. For customers comparing Pirelli Tyres, the P Zero PZ4 stands out as a performance-focused summer option for premium applications. Dwbtyres can use this specification when helping customers looking to buy car tyres in UAE where the vehicle requires this exact Run Flat and BMW-approved configuration.