Buy 335/30 R21 Tyres

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Eagle F1 Supersport R

335/30R21 Y (109)
  • 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.

  • 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.

  • 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.

  • 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:17-11-2026
Fully Fitted Price
£497.65
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335/30 R21 Tyres at a Glance

  • 1summer tyre
  • CEU wet grip
  • 74EU road noise (dB)

Load and speed ratings on sale

RatingMax load per tyreTop speedTyres
109Y1,030 kg186 mph1

335/30 R21 Size Guide

Tyres.co.uk stocks 335/30 R21 tyres. 335mm is the width. 30 is the sidewall aspect ratio, so the sidewall is 30% of 335mm, or 100mm. R21 is for a radial tyre that fits a 21-inch rim, which gives an overall diameter of 734mm. A sidewall this short gives sharp, precise steering, with a firmer ride over broken roads.

Part of the sizeValueWhat it means
Section width 335 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 335 mm (about 101 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 100.5 mm (3.96 in)
Overall diameter 734 mm (28.9 in)
Circumference 2,307 mm (90.8 in)
Revolutions 698 per mile · 433 per km
Similar sizes
SizeOverall diameter
205/80 R16734 mm · 0.0%
275/55 R17734 mm · 0.0%
235/70 R16735 mm · +0.1%
235/75 R15734 mm · -0.1%
325/35 R20736 mm · +0.1%
225/45 R21736 mm · +0.2%