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The 345/30 R21 tyre has the following characteristics: a width of 345, a height of 30 and a diameter of 21 inches. These dimensions exist for summer tyres.
These tyre dimensions are suitable for vehicles in sports models categories.
See our selection of 345/30 R21 tyres below, including indications of fuel consumption, adhesion on wet ground and external road noise.

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    Car Tyre Bridgestone Potenza Sport
    See product data sheet

    Bridgestone Potenza Sport

    345/30 R21 111 Y
    • XL
    • FSL
    • L
    • XL: Reinforced tyres. Have a higher load index.
    • FSL: Flange rim protection
    • L: Lamborghini
    Car tyres Summer
    • C
      Fuel consumption
    • D
      Wet grip
    • 73dB
      External noise in decibels
    • 4 in stock
    • Delivery within 48 hours
    £415 ⁠40
    /Delivered Tyre
    £407 ⁠09
    with
    ★★★★★
    (Reviews: 79)
  • Car Tyre Bridgestone Potenza Sport
    See product data sheet

    Bridgestone Potenza Sport

    345/30 R21 111 Y
    • XL
    • FSL
    • L
    • XL: Reinforced tyres. Have a higher load index.
    • FSL: Flange rim protection
    • L: Lamborghini
    Car tyres Summer
    • C
      Fuel consumption
    • D
      Wet grip
    • 73dB
      External noise in decibels
    • 4 in stock
    • Delivery within 48 hours
    £415 ⁠40
    /Delivered Tyre
    £407 ⁠09
    with
    ★★★★★
    (Reviews: 79)

345/30 R21 car tyres
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Speed index
For winter tyres, the speed rating can be lowered to 2 ratings below the original (unless otherwise specified by the maker).
Inversely, for all tyres, you can fit tyres with speed ratings higher than the original ones if necessary.
Load index
You can fit tyres with a load index higher than that of your original tyres.
Vehicle / usage
Characteristics
Grip on wet surface
Measure the impact of a vehicle's wet grip
Fuel consumption
Measure the impact of a tyre's rolling resistance on a vehicle's fuel efficiency
Noise
Measure a tyre's external rolling noise (expressed in decibels) - this is not the tyre noise audible inside a vehicle
Don't know which tyre to choose? See Pneus Online selections