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Sport Contact 5P

325/40R21 Y (113)
4.7/5
(3 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.

  • 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.

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
£30445
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325/40 R21 Explained

325/40 R21 is a unique size found primarily on heavyweight SUVs. We can break it down; 325 is the width, in mm; 40 is the aspect ratio, meaning that the height of the sidewall is 40% of 325mm (or 130mm). R21 signifies a radial tyre on a 21-inch wheel. 325/40 R21 has an overall diameter of 793mm, and has a sidewall of 130mm which also gives the wheel some protection. We sell 325/40 R21 at Tyres.co.uk, including XL versions.

Part of the sizeValueWhat it means
Section width 325 The width of the tyre across the tread, measured in millimetres.
Profile (aspect ratio) 40 Sidewall height as a percentage of the width - here, 40% of 325 mm (about 130 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 130.0 mm (5.12 in)
Overall diameter 793 mm (31.2 in)
Circumference 2,493 mm (98.1 in)
Revolutions 646 per mile · 401 per km
Equivalent sizes
SizeOverall diameter
325/35 R22 786 mm · -0.9%
315/40 R21 785 mm · -1.0%
305/40 R22 803 mm · +1.2%
315/35 R22 779 mm · -1.8%
305/50 R20 813 mm · +2.5%
305/35 R22 772 mm · -2.7%