315/45 R21 Tyres

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315/45R21 Y (116) Image
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Premium Contact 6

315/45R21 Y (116)
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.

  • 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.

Fit from:19-10-2026
Fully Fitted Price
£333.77
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315/45 R21 Tyre Reviews

Overall rating5.0/5
Based on 2 reviews
Juliette Yorston
The previously fitted Pirelli tyres are quieter than the Continentals.
Continental Premium Contact 6
Edward Litchfield
As expected, provides good traction in winter conditions.
Continental Premium Contact 6
Read more reviews
315/45 R21 Tyre Reviews

315/45 R21 Tyre Reviews

5.0/52 reviews

Showing 1–2 of 2 reviews

About these reviews

Tyre reviews recording 315/45 R21, across tyre brands and tread ranges. Each review identifies its tyre range.

315/45 R21 Size Breakdown

315/45 R21 is for large SUVs and is typically found on heavier vehicles. 315 indicates the tyre width in millimetres. 45 is the sidewall height as 45% of the aforementioned 315mm, or 142mm. R21 indicates the size of the rim the tyre was made for, in this case, a 21-inch rim, and that the tyre is radial. 315/45 R21 gives an overall diameter of 817mm. Tyres.co.uk offers this size in their standard and XL variants.

Part of the sizeValueWhat it means
Section width 315 The width of the tyre across the tread, measured in millimetres.
Profile (aspect ratio) 45 Sidewall height as a percentage of the width - here, 45% of 315 mm (about 142 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 141.8 mm (5.58 in)
Overall diameter 817 mm (32.2 in)
Circumference 2,566 mm (101.0 in)
Revolutions 627 per mile · 390 per km
Similar sizes
SizeOverall diameter
325/40 R22 819 mm · +0.2%
305/50 R20 813 mm · -0.5%
305/40 R22 803 mm · -1.7%
305/45 R22 833 mm · +2.0%
295/40 R22 795 mm · -2.7%
325/40 R21 793 mm · -2.9%

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