305/25 R21 Tyres

Browse 305/25 R21 tyres from trusted brands, choose the right specification, and order online with fitting or delivery to suit you.

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305/25R21 Y (98) Image
  • D
    Fuel Efficiency / Rolling Resistance: D

    Rolling resistance has a direct impact on fuel consumption. A tyre's rolling resistance score ranges from A to E.

  • A
    Wet Grip / Braking Performance: A

    A tyre's wet grip capacity is expressed in Grades from A to E. The difference in braking distances between each grade is roughly 3m - an average car length.

  • 73B
    Noise Emission / Exterior Noise: 73

    The exterior noise grade of a tyre is expressed in decibels and accompanied by an external rolling noise rating - ranging from A (least exterior noise) to C (highest level of noise).

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Pilot Sport 4 S

305/25R21 Y (98)
Excellent Grip in Wet
  • Tick Icon Car
    Car tyre:

    These tyres have been specifically designed for fitment and use on cars.

  • Tick Icon Reinforced (XL)
    Extra Load or Reinforced tyres:

    These tyres are designed with a stronger sidewall, making them capable of handling more weight than your average tyre. Typically, they are classified by the letters 'XL' on the sidewall.

We can fit: 21-04-2026
Fully Fitted Price
£34012
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305/25 R21 is an ultra-wide, low-profile tyre built for 21 inch alloy wheels, typically chosen for high-power SUVs and performance cars where maximum rear grip and a precise feel matter. The 305 mm section width is designed to put torque down confidently, while the 25 profile delivers sharper response but depends on selecting the correct load index and speed rating. Narrow your options by brand, season, and construction such as XL reinforcement or run-flat variants, then compare pricing side by side. With Tyres.co.uk, order the exact 305/25 R21 specification your vehicle requires and arrange fitting or delivery.

Buying 305/25 R21 Tyres: FAQ

Check the tyre size listed on the door jamb placard or in the owner’s handbook, then match it to what is currently fitted. If your vehicle uses a staggered set-up, make sure 305/25 R21 is specified for the correct axle. It is also worth confirming your wheel width is approved for 305/25 R21 to avoid clearance or handling issues.

Choose 305/25 R21 tyres with at least the load index and speed rating shown on your vehicle placard or handbook. Do not fit a lower rating, as it can be unsafe and may be illegal. If you are unsure, filter options by the required ratings first, then compare brands and tread patterns.

Some 305/25 R21 options are offered with XL (extra load) construction, and in certain ranges run-flat technology may also be available. You should match what your vehicle is designed for, especially if it was supplied with run-flats or relies on them instead of a spare. Avoid mixing run-flat and non run-flat on the same axle for consistent ride and handling.

Yes, 305/25 R21 is often chosen as a rear fitment in staggered configurations, but it should only be used if your vehicle manufacturer or wheel and tyre approval supports it. Keep overall rolling radius within acceptable tolerance to protect driveline and stability systems. For best balance, fit matching tyres across each axle and replace in pairs when possible.

Many 305/25 R21 tyres are summer-focused because the size is commonly used on high-performance set-ups, offering strong dry handling and stable high-speed control. Winter and all-season availability can be limited in this niche size, so check stock early if you need cold-weather capability. If you drive year-round, consider whether a second wheel set for winter conditions is more practical for 305/25 R21.