Buy 325/25 R21 Tyres

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Sport Contact 6

325/25R21 Y (102)
3.0/5
(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.

  • A
    Wet Grip
    Wet Grip / Braking Performance: A

    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.

  • B75 dB
    External Noise
    Noise Emission / Exterior Noise: B (75 dB)

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

Wet Grip Excellence
  • 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
£32741
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Pilot Sport 4 S

325/25R21 Y (102)
5.0/5
(2 reviews)
  • C
    Fuel Efficiency
    Fuel Efficiency / Rolling Resistance: C

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

  • A
    Wet Grip
    Wet Grip / Braking Performance: A

    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.

Wet Grip Excellence
  • 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
£37214
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325/25 R21 Width, Profile and Rim

325/25 R21 is an ultra low-profile size suited for high-performance cars. The designation explains itself. 325 means the tyre is 325mm wide. The number 25 is the aspect ratio; this tyre has a sidewall of 81mm (25% of 325mm). R21 means it is a radial tyre fitted to a 21" rim. The sidewall (81mm) and the rim (21") give this tyre an overall diameter of 696mm. The sidewall offers less protection to the rim on bad roads because it is low. You'll find 325/25 R21 (including the XL versions) in stock at Tyres.co.uk.

Part of the sizeValueWhat it means
Section width 325 The width of the tyre across the tread, measured in millimetres.
Profile (aspect ratio) 25 Sidewall height as a percentage of the width - here, 25% of 325 mm (about 81 mm).
Construction R Radial construction, which is what nearly all road tyres use.
Rim diameter 21 The wheel diameter the tyre fits, measured in inches.
Your tyre dimensions
MeasurementValue
Sidewall height 81.2 mm (3.20 in)
Overall diameter 696 mm (27.4 in)
Circumference 2,186 mm (86.1 in)
Revolutions 736 per mile · 457 per km
Equivalent sizes
SizeOverall diameter
315/30 R20 697 mm · +0.2%
305/30 R20 691 mm · -0.7%
325/30 R20 703 mm · +1.0%
305/25 R21 686 mm · -1.4%
335/30 R20 709 mm · +1.9%
305/30 R21 716 mm · +2.9%