255/30 R21 Car Tyres - Cheapest Prices & Fitted Free

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View 5 Products

Eagle F1 Supersport

255/30R21 Y (93)

5.0/5

(1 reviews)

D
Fuel Efficiency

Fuel Efficiency / Rolling Resistance: D
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

Car

Car tyre:
Designed for cars, rather than vans, 4x4s or commercial vehicles.
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:18-10-2026

Fully Fitted Price

^£298^.72

Quantity

Pilot Sport 4 S

255/30R21 Y (93)

5.0/5

(3 reviews)

D
Fuel Efficiency

Fuel Efficiency / Rolling Resistance: D
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.
B71 dB
External Noise

Noise Emission / Exterior Noise: B (71 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

Car

Car tyre:
Designed for cars, rather than vans, 4x4s or commercial vehicles.
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:18-10-2026

Fully Fitted Price

^£320^.43

Quantity

Sport Contact 7

255/30R21 Y (93)

4.7/5

(3 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.
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

Car

Car tyre:
Designed for cars, rather than vans, 4x4s or commercial vehicles.
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:18-10-2026

Fully Fitted Price

^£322^.18

Quantity

AS-1

255/30R21 Y (93)

4.0/5

(1 reviews)

D
Fuel Efficiency

Fuel Efficiency / Rolling Resistance: D
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.
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.

Car

Car tyre:
Designed for cars, rather than vans, 4x4s or commercial vehicles.
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:18-10-2026

Fully Fitted Price

^£186^.95

Quantity

Ecsta Sport S (PS72)

255/30R21 Y (93)

5.0/5

(1 reviews)

D
Fuel Efficiency

Fuel Efficiency / Rolling Resistance: D
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.
B72 dB
External Noise

Noise Emission / Exterior Noise: B (72 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

Car

Car tyre:
Designed for cars, rather than vans, 4x4s or commercial vehicles.
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:18-10-2026

Fully Fitted Price

^£199^.40

Quantity

You've viewed 5 of 5 products

255/30 R21 Tyre Reviews

Overall rating4.8/5

Based on 12 reviews

Naima V.

Great quality and suitable for any vehicle, I'd definitely recommend them.

Continental Sport Contact 7

Fynn Royall

It performs exceptionally well in all areas. Always provides a secure grip for the vehicle.

Pirelli P Zero

Kieran Bobby-Lee

My Pirelli tyres started cracking, so based on some reviews, I chose the PS4s. There is a significant improvement in road noise, the grip is excellent (even in the wet) and the car…

Michelin Pilot Sport 4 S

255/30 R21 Tyre Reviews

4.8/512 reviews

Showing 1–10 of 12 reviews

About these reviews

Tyre reviews recording 255/30 R21, across tyre brands and tread ranges. Each review identifies its tyre range.

5/5

Continental Sport Contact 7

Great quality and suitable for any vehicle, I'd definitely recommend them.

5/5

Pirelli P Zero

It performs exceptionally well in all areas. Always provides a secure grip for the vehicle.

5/5

Michelin Pilot Sport 4 S

My Pirelli tyres started cracking, so based on some reviews, I chose the PS4s. There is a significant improvement in road noise, the grip is excellent (even in the wet) and the car rides smoother.

5/5

Kumho Ecsta Sport S (PS72)

These tyres are terrific. I have experienced all kinds of weather and have never felt like I lacked grip.

4/5

Nankang AS-1

They are good tyres overall. They perform well in the wet and dry, but some road noise can be heard at higher speeds.

5/5

Pirelli P Zero

The performance of these tyres meets the expectations of a premium brand.

5/5

Michelin Pilot Sport 4 S

The tyres are functioning exactly as expected. Great traction in both wet and dry conditions.

5/5

Continental Sport Contact 7

The tyres do their job well, but they do make a fair amount of noise.

5/5

Continental Sport Contact 7

From my experience, these tyres demonstrate the best grip.

The size 255/30 R21 is an ultra-low-profile tyre size, designed to fit 21-inch wheels. The first number, 255, represents the width of the tyre in millimetres. The second number, 30, is the tyre's aspect ratio, which indicates the sidewall height as a percentage of the tyre width. In this case, the sidewall height is 30% of 255mm, which is 76mm. R21 indicates a radial tyre, which is on a 21-inch rim. The overall diameter is 686mm. With such a low sidewall, there is minimal tyre height over the rim. We have 255/30 R21s available at Tyres.co.uk.

Part of the size	Value	What it means
Section width	255	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 255 mm (about 76 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

Measurement	Value
Sidewall height	76.5 mm (3.01 in)
Overall diameter	686 mm (27.0 in)
Circumference	2,156 mm (84.9 in)
Revolutions	746 per mile · 464 per km

Similar sizes

Size	Overall diameter
255/35 R20	686 mm · +0.0%
245/30 R21	680 mm · -0.9%
265/30 R21	692 mm · +0.9%
245/35 R20	680 mm · -1.0%
265/35 R20	694 mm · +1.0%
235/40 R20	696 mm · +1.4%