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Mud Terrain T/A KM3

305/55R20 Q (121)
5.0/5
(1 reviews)
  • -
    Fuel Efficiency
    Fuel Efficiency / Rolling Resistance: -

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

  • -
    Wet Grip
    Wet Grip / Braking Performance: -

    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.

  • -dB
    External Noise
    Noise Emission / Exterior Noise: - 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:02-09-2026
Fully Fitted Price
£43148
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305/55 R20 Size Breakdown

305/55 R20 is a standard fitment for many 4x4s and pickups. In more detail, 305 is tyre width in millimetres and 55 is the sidewall height as a percentage of the width, so in this case 55% of 305 is 168mm. R20 indicates a radial tyre designed for a 20-inch rim. This configuration gives an overall diameter of 844mm. The tall sidewall is designed to flex and absorb impacts which makes it a great choice for unsealed and rougher roads. At Tyres.co.uk, we stock 305/55 R20 tyres.

Part of the sizeValueWhat it means
Section width 305 The width of the tyre across the tread, measured in millimetres.
Profile (aspect ratio) 55 Sidewall height as a percentage of the width - here, 55% of 305 mm (about 168 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 167.8 mm (6.60 in)
Overall diameter 844 mm (33.2 in)
Circumference 2,650 mm (104.3 in)
Revolutions 607 per mile · 377 per km
Equivalent sizes
SizeOverall diameter
285/55 R20 822 mm · -2.6%