315/40r21 Grenlander Tyre

The 315/40R21 tyre size means: 315 – Tyre width is 315 mm. 40 – Aspect ratio is 40%, so the sidewall height is 126 mm (40% of 315 mm). R – Radial construction. 21 – Fits a 21-inch wheel (rim). Typical dimensions: Overall diameter: approximately 785 mm (30.9 inches) Recommended rim width: 10.5–12.5 inches This size is commonly used on high-performance SUVs and luxury vehicles, providing: Excellent stability and grip. Responsive handling. A comfortable balance between performance and ride quality. The load index and speed rating vary by tyre brand and model. Common ratings include 111Y XL or 115V XL, where: 111 = Maximum load of 1,090 kg per tyre. 115 = Maximum load of 1,215 kg per tyre. V = Maximum speed of 240 km/h. Y = Maximum speed of 300 km/h. XL (Extra Load) = Reinforced construction for higher load capacity.