Bridgestone 265/40 R21 105Y Potenza Sport 2024

Bridgestone Potenza Sport 265/40 ZR21 105Y XL is a high-performance summer tyre developed for passenger cars and SUVs where precise handling, strong dry-road grip and confident wet-road performance are important. The 105Y XL service description corresponds to a maximum load capacity of 925 kg per tyre, while the Y rating corresponds to a maximum rated speed of 300 km/h. Bridgestone confirms this exact 265/40R21 105Y XL specification within the Potenza Sport range. 

About Bridgestone Potenza Sport 265/40 ZR21 105Y XL

The Potenza Sport is Bridgestone's high-performance summer tyre, engineered to provide responsive handling, strong cornering stability and high levels of grip. Its asymmetric tread design and optimized casing are intended to support controlled cornering and steering precision, while the tread compound and pattern are designed for strong dry and wet performance. 

265/40 ZR21 Tyre Size

The 265/40 ZR21 designation indicates a nominal section width of 265 mm, a 40-series aspect ratio, radial construction and compatibility with a 21-inch wheel. For this specification, the approved rim width range is 9.0–10.5 inches, with a measured rim width of 9.5 inches. The listed section width is approximately 10.7 inches and the overall diameter is approximately 29.3 inches. 

105Y Load and Speed Rating

The 105 load index corresponds to a maximum load capacity of 925 kg per tyre. The Y speed rating corresponds to a maximum rated speed of 300 km/h. This specification is XL, indicating reinforced construction, and has a listed maximum inflation pressure of 50 psi. The vehicle manufacturer's specified tyre size, load requirement and operating limits should always be followed. 

Wet Road Performance

The Potenza Sport 265/40 ZR21 carries an A rating for wet grip under the EU tyre-label system. Bridgestone states that the tread's optimized land-to-groove ratio helps evacuate water efficiently, while 3D sipes are designed to support cornering and braking performance on wet surfaces. 

Dry and Wet Grip

On dry roads, the Potenza Sport uses a sporty profile and performance-oriented tread compound designed to increase road contact and support braking and cornering performance. The asymmetric tread design and optimized carcass construction are intended to provide controlled cornering behaviour and steering precision in both straight-line and curved-road driving. 

Summer Use

This 265/40 ZR21 105Y XL specification is a summer high-performance tyre intended for compatible passenger cars and SUVs. It is tubeless and uses a performance-oriented asymmetric tread design. The exact specification is not identified as a 3PMSF winter tyre. :contentRe

Comfort and Noise

The exact 265/40 ZR21 specification is listed with an external rolling noise value of 72 dB and noise class B in available EU-label data. The tread design is developed to balance high-performance handling with controlled road noise. :contentReference[oaicite:7]{index=7}

2024 Production

The requested tyre is specified as a 2024 production tyre. The exact manufacturing week should be verified from the DOT or manufacturing-date marking on the individual tyre sidewall rather than inferred from the model specification.

Who Should Consider This Tyre?

Bridgestone Potenza Sport 265/40 ZR21 105Y XL is suitable for drivers of compatible high-performance passenger cars and SUVs who want a summer tyre with a 925 kg per-tyre load capacity, Y speed rating, reinforced XL construction, strong dry-road handling and an A-rated wet grip performance.