Accelera 245/40 R21 100Y PHI 2024

Accelera PHI 245/40 R21 100Y is a high-performance road tyre designed for drivers seeking responsive steering, stable road contact and predictable handling on paved surfaces. This exact 245/40ZR21 100Y XL configuration has a 100 load index, supporting a maximum load of 800 kg per tyre, and a Y speed rating for speeds up to 300 km/h. The 245 mm width and 40-series profile create a low-profile setup suited to performance-oriented passenger cars and SUVs.

About Accelera PHI 245/40 R21 100Y

The Accelera PHI is an all-season performance tyre built around controllability, wet-road traction and road stability. For the exact 245/40ZR21 100Y XL size, manufacturer data specifies a 44 psi maximum inflation pressure, an 8.5-inch measuring rim, 248 mm section width, 729 mm overall diameter and 8.2 mm tread depth. The XL construction is important because this specification combines a relatively low 40-series sidewall with a substantial 800 kg maximum load per tyre.

Tread design and steering response

The PHI uses a straight medium centre rib together with dynamic medium lateral grooves and defined shoulder blocks. The centre rib is intended to support stability and flexibility on dry roads, while the lateral grooves contribute to wet handling and rolling resistance. Shoulder block sequencing provides additional biting edges for cornering and manoeuvring. The pattern is designed for paved-road performance rather than loose terrain or serious off-road driving.

Dry-road handling and cornering

The 245 mm section width provides a broad contact footprint, while the 40-series sidewall limits sidewall movement compared with taller profiles. This configuration can give the Accelera PHI a more immediate steering response and planted feel during lane changes and cornering. The 100Y XL specification combines a high load capacity with a 300 km/h speed rating. Actual handling will depend on alignment, suspension condition, inflation pressure, vehicle loading and driving style.

Wet-road traction and braking

Water management is a key part of the PHI tread design. The dynamic lateral grooves are intended to improve wet handling, while the tread compound and groove arrangement support all-season road traction. The published UTQG rating is 400 AA, representing a 400 treadwear grade with A traction and A temperature classifications. European labelling information for this exact size lists a C wet-grip rating. These classifications should be treated as comparative indicators rather than guaranteed braking distances.

Comfort, noise and everyday driving

The 40-series profile gives the Accelera PHI a sportier road feel but provides less sidewall cushioning than a higher-profile tyre. Variable shoulder block sequencing is designed to reduce generated road noise, while the lightweight construction and lateral grooves are intended to reduce rolling resistance. The exact-size specification lists 70 dB external rolling noise in one European listing. Actual cabin noise and ride comfort will vary according to the vehicle, road surface, pressure and suspension condition.

Who should consider this Accelera?

Accelera PHI 245/40 R21 100Y is suited to drivers who prioritise responsive road handling, a low-profile appearance and predictable performance on urban roads and highways. It may not suit drivers seeking maximum sidewall cushioning, dedicated winter performance or serious off-road capability. For customers using Dwbtyres to buy car tyres in UAE, the vehicle placard and existing sidewall markings should be checked before ordering. Buyers comparing Accelera Tyres should match the complete 245/40 R21 100Y XL specification.