Buy 285/40 R18 Tyres

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Pilot Sport 4 S

285/40R18 Y (105)
  • 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:16-11-2026
Fully Fitted Price
£335.20
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285/40 R18 Tyres in Numbers

  • 1summer tyre
  • AEU wet grip
  • 73EU road noise (dB)

Load and speed ratings on sale

RatingMax load per tyreTop speedTyres
105Y925 kg186 mph1

Cars that use 285/40 R18

Ford Mustang Maserati Quattroporte

285/40 R18 Size Guide

Tyres.co.uk stocks 285/40 R18 for the Ford Mustang and Maserati Quattroporte. 285mm is the width. 40 is the sidewall aspect ratio, so the sidewall is 40% of 285mm, or 114mm. R18 is for a radial tyre that fits an 18-inch rim, which gives an overall diameter of 685mm. That low profile keeps the steering sharp while leaving some sidewall to take the edge off rough roads.

Part of the sizeValueWhat it means
Section width 285 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 285 mm (about 114 mm).
Construction R Radial construction, which is what nearly all road tyres use.
Rim diameter 18 The wheel diameter the tyre fits, measured in inches.
Your tyre dimensions
MeasurementValue
Sidewall height 114.0 mm (4.49 in)
Overall diameter 685 mm (27.0 in)
Circumference 2,153 mm (84.7 in)
Revolutions 748 per mile · 465 per km
Similar sizes
SizeOverall diameter
225/45 R19 685 mm · 0.0%
295/30 R20 685 mm · 0.0%
215/65 R16 686 mm · +0.1%
305/25 R21 686 mm · +0.1%
175/80 R16 686 mm · +0.2%
255/30 R21 686 mm · +0.2%