235/40 R21 Tyres

Browse and buy 235/40 R21 tyres from trusted brands, ideal for sports cars and track-capable grip with aggressive cornering stability.

Buy 235/40 R21 Tyres

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235/40R21 H (98) Image
  • C
    Fuel Efficiency / Rolling Resistance: C

    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.

  • 72B
    Noise Emission / Exterior Noise: 72

    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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Eco Contact 7 S

235/40R21 H (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: 20-04-2026
Fully Fitted Price
£24849
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235/40 R21 is a versatile tyre size suited to high-performance saloons that need track-capable grip with aggressive cornering stability. Common fitments include BMW M3 variants and Audi RS models, where the combination of width and profile delivers a confident, composed ride on UK roads. Before buying 235/40 R21 tyres, always verify the load index and speed rating match your vehicle's requirements — these details appear on the tyre sidewall and in your owner's manual. Compare 235/40 R21 tyres from budget to premium brands on Tyres.co.uk and order online with free local fitting included.

Buying 235/40 R21 Tyres: FAQ

235 is the tyre width in millimetres, 40 is the aspect ratio showing sidewall height as a percentage of the width, R means radial construction, and 21 is the wheel rim diameter in inches. Always match these numbers exactly when replacing your tyres to ensure correct fitment and safe handling.

235/40 R21 is a popular fitment on BMW M3 variants and Audi RS models. The specific vehicles using this size can vary by model year and trim level, so always confirm the correct size from your door-jamb sticker, fuel cap label or owner's handbook before purchasing.

You should only fit an alternative size if your vehicle manufacturer explicitly approves it. Changing from 235/40 R21 can affect speedometer accuracy, handling balance, ABS calibration and fuel economy. If you are unsure, match the exact 235/40 R21 specification printed on your existing tyres or listed in your owner's manual.

Summer 235/40 R21 tyres deliver the best grip and shortest braking distances in warm, dry conditions. Winter 235/40 R21 tyres with the three-peak mountain snowflake symbol are designed for temperatures below 7°C and perform better on ice and snow. All-season 235/40 R21 tyres offer a year-round compromise and are a practical choice for UK drivers who prefer not to swap sets seasonally.

The required load index and speed rating for your 235/40 R21 tyres are printed on your existing tyre sidewall, typically as a code like 91V or 104T immediately after the size marking. Always match or exceed these values — never fit a tyre with a lower load or speed rating than specified. Your vehicle handbook and the label inside the driver's door frame also list the correct ratings.