Buy 315/30 R20 Tyres

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Potenza S005

315/30R20 Y (101)
4.5/5
(21 reviews)
  • D
    Fuel Efficiency
    Fuel Efficiency / Rolling Resistance: D

    How much fuel the tyre uses as it rolls. Graded A to E, where A is the most efficient and E the least.

  • B
    Wet Grip
    Wet Grip / Braking Performance: B

    How well the tyre stops in the wet. Graded A to E, where A is the shortest stopping distance. Each grade is worth roughly 3 metres, about a car length.

  • B74 dB
    External Noise
    Noise Emission / Exterior Noise: B (74 dB)

    How loud the tyre is from outside the car, measured in decibels. Graded A to C, where A is the quietest.

  • Tick Icon Car
    Car tyre:

    Designed for cars, rather than vans, 4x4s or commercial vehicles.

Fit from:03-09-2026
Fully Fitted Price
£37428
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P Zero (PZ4)

315/30R20 Y (104)
5.0/5
(2 reviews)
  • D
    Fuel Efficiency
    Fuel Efficiency / Rolling Resistance: D

    How much fuel the tyre uses as it rolls. Graded A to E, where A is the most efficient and E the least.

  • C
    Wet Grip
    Wet Grip / Braking Performance: C

    How well the tyre stops in the wet. Graded A to E, where A is the shortest stopping distance. Each grade is worth roughly 3 metres, about a car length.

  • A69 dB
    External Noise
    Noise Emission / Exterior Noise: A (69 dB)

    How loud the tyre is from outside the car, measured in decibels. Graded A to C, where A is the quietest.

Noise Reduction
  • Tick Icon Car
    Car tyre:

    Designed for cars, rather than vans, 4x4s or commercial vehicles.

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

    A stronger sidewall lets this tyre carry more weight than a standard tyre of the same size. Marked XL on the sidewall.

Fit from:03-09-2026
Fully Fitted Price
£42299
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Pilot Sport 4 S

315/30R20 Y (104)
  • D
    Fuel Efficiency
    Fuel Efficiency / Rolling Resistance: D

    How much fuel the tyre uses as it rolls. Graded A to E, where A is the most efficient and E the least.

  • B
    Wet Grip
    Wet Grip / Braking Performance: B

    How well the tyre stops in the wet. Graded A to E, where A is the shortest stopping distance. Each grade is worth roughly 3 metres, about a car length.

  • B73 dB
    External Noise
    Noise Emission / Exterior Noise: B (73 dB)

    How loud the tyre is from outside the car, measured in decibels. Graded A to C, where A is the quietest.

  • Tick Icon Car
    Car tyre:

    Designed for cars, rather than vans, 4x4s or commercial vehicles.

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

    A stronger sidewall lets this tyre carry more weight than a standard tyre of the same size. Marked XL on the sidewall.

Fit from:03-09-2026
Fully Fitted Price
£55221
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315/30 R20 Numbers Explained

The size 315/30 R20 is typically the size used on the rear wheels of powerful sports cars. On staggered setups, it will be the only size used on the rear. The first number, 315, is the width of the tyre in mm. The second number, 30, is the sidewall height aspect ratio, which is 30% of the width (in this case, 94mm). R20 indicates it is a radial tyre that is mounted on a 20-inch wheel. This size has an overall diameter of 697mm. You'll find this size on Tyres.co.uk, including the XL variants.

Part of the sizeValueWhat it means
Section width 315 The width of the tyre across the tread, measured in millimetres.
Profile (aspect ratio) 30 Sidewall height as a percentage of the width - here, 30% of 315 mm (about 94 mm).
Construction R Radial construction, which is what nearly all road tyres use.
Rim diameter 20 The wheel diameter the tyre fits, measured in inches.
Your tyre dimensions
MeasurementValue
Sidewall height 94.5 mm (3.72 in)
Overall diameter 697 mm (27.4 in)
Circumference 2,190 mm (86.2 in)
Revolutions 735 per mile · 457 per km
Equivalent sizes
SizeOverall diameter
325/25 R21 696 mm · -0.2%
305/30 R20 691 mm · -0.9%
325/30 R20 703 mm · +0.9%
295/35 R19 689 mm · -1.1%
305/25 R21 686 mm · -1.6%
295/30 R20 685 mm · -1.7%