Seam 265/45 R21 104Y Jupiter 2024

Seam Jupiter 265/45 R21 104Y is a high-performance summer tyre designed for compatible passenger cars and SUVs requiring a 21-inch fitment. It is engineered to provide responsive steering, stable road handling, strong dry-road grip and controlled wet-road performance. This configuration features a 265 mm section width, 45-series profile and 21-inch rim, with a 104Y service description. Load index 104 corresponds to a maximum load of 900 kg per tyre, while the Y speed rating allows speeds up to 300 km/h under the specified operating conditions.

About Seam Jupiter 265/45 R21 104Y

The Jupiter is a performance-oriented road tyre designed for vehicles requiring a large 21-inch wheel fitment. Its 265 mm footprint and 45-series profile provide a balance of steering precision, high-speed stability and everyday driving comfort.

Tread Design and Steering Response

The road-oriented tread is designed to maintain consistent contact with the road and provide predictable steering response. The wide footprint supports directional stability during highway driving, lane changes and cornering.

Dry-Road Handling and Cornering

The 265 mm section width provides a broad contact area for dry-road grip, while the 45-series profile offers a balance between steering response and sidewall cushioning. This configuration is suited to drivers seeking stable and responsive paved-road handling.

Wet-Road Performance

The tread design is intended to help channel water away from the contact area and maintain predictable handling on wet paved roads. Actual wet-road grip and braking performance depend on tyre condition, inflation pressure, temperature, road surface and vehicle setup.

Comfort and Everyday Driving

The 45-series profile provides a practical compromise between handling precision and ride comfort. Compared with lower-profile configurations, it can provide additional sidewall cushioning over normal road imperfections.

Seasonal Performance

The Jupiter is classified as a summer tyre and is intended primarily for paved-road driving in warm and moderate conditions. It is not a dedicated winter tyre.

Load Capacity and Speed Rating

The 104 load index corresponds to a maximum load of 900 kg per tyre. The Y speed rating corresponds to a maximum rated speed of 300 km/h, subject to the applicable load, inflation pressure and vehicle manufacturer's requirements.

Who Should Consider This Tyre?

Seam Jupiter 265/45 R21 104Y is suitable for compatible passenger cars and SUVs requiring this exact fitment. It is particularly suited to drivers seeking responsive steering, stable road behaviour, strong dry-road grip and controlled wet-road performance from a 21-inch performance tyre.