305/30 R21 Tyre Reviews

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View 8 Products

Sport Contact 7

305/30R21 Y (104)

5.0/5

(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

^£354^.40

Quantity

Potenza Sport

305/30R21 Y (104)

4.0/5

(2 reviews)

A
Fuel Efficiency

Fuel Efficiency / Rolling Resistance: A
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

Great Fuel Efficiency

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

^£357^.92

Quantity

Eagle F1 (Asymmetric 3)

305/30R21 Y (104)

5.0/5

(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.
B
Wet Grip

Wet Grip / Braking Performance: B
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

^£363^.58

Quantity

P Zero (PZ4) Elect

305/30R21 Y (104)

4.8/5

(15 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.
A72 dB
External Noise

Noise Emission / Exterior Noise: A (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

Noise Reduction

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

^£367^.31

Quantity

P Zero (PZ4)

305/30R21 Y (100)

5.0/5

(2 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.

Fit from:18-10-2026

Fully Fitted Price

^£370^.28

Quantity

Pilot Sport EV

305/30R21 Y (104)

4.5/5

(2 reviews)

B
Fuel Efficiency

Fuel Efficiency / Rolling Resistance: B
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

^£381^.52

Quantity

Pilot Sport S 5

305/30R21 Y (107)

4.8/5

(10 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.
B
Wet Grip

Wet Grip / Braking Performance: B
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.
B75 dB
External Noise

Noise Emission / Exterior Noise: B (75 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

^£393^.94

Quantity

Pilot Sport 4 S

305/30R21 Y (104)

5.0/5

(2 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.
B
Wet Grip

Wet Grip / Braking Performance: B
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

^£394^.01

Quantity

You've viewed 8 of 8 products

Overall rating4.8/5

Based on 39 reviews

Susie Fenn

The tyres perform exceptionally well under any conditions.

Goodyear Eagle F1 (Asymmetric 3)

Poppy Dudley

The handling of my car has been completely changed because of these tyres.

Michelin Pilot Sport S 5

Sophie Rafael

Certainly worth the investment, satisfied with the performance up until now.

Michelin Pilot Sport EV

305/30 R21 Tyre Reviews

4.8/539 reviews

Showing 21–30 of 39 reviews

About these reviews

Tyre reviews recording 305/30 R21, across tyre brands and tread ranges. Each review identifies its tyre range.

5/5

Pirelli P Zero (PZ4) Elect

I had these tyres fitted last week, and I can see a significant difference.

5/5

Pirelli P Zero (PZ4) Elect

A pleasant ride and decent grip as well.

5/5

Michelin Pilot Sport S 5

Grip in damp conditions could certainly improve.

5/5

Pirelli P Zero (PZ4) Elect

Performance under different conditions has been overall very satisfactory.

5/5

With my GR Yaris, the Conti SC7s have been amazing. For dry conditions, they are good and even better for wet conditions. They last shorter than the Michelin PS4S, but since they are cheaper, they are better value. They are good for wet track days, but since they are softer, dry track days are better to keep runs short.

5/5

Michelin Pilot Sport S 5

Outstanding performance; I have no criticism whatsoever.

5/5

Pirelli P Zero (PZ4) Elect

Tyres have altered the experience of being inside the vehicle.

5/5

Michelin Pilot Sport EV

No issues with service at the fitting station.

5/5

Pirelli P Zero (PZ4) Elect

Impressed by the extremely good handling in wet weather.

5/5

Michelin Pilot Sport S 5

Easy to schedule and extremely fast turnaround for the fitting service.

305/30 R21 is the original equipment rear size on Porsche Taycan and Audi e-tron GT. 305 is the tyre width in millimetres. 30 is the aspect ratio so the sidewall is 30% of 305mm, which is 91.5mm. R21 is a radial tyre on a 21-inch rim, making its overall diameter 716mm. Its sidewall is best suited to this staggered layout. Tyres.co.uk stocks 305/30 R21, including the XL versions.

Part of the size	Value	What it means
Section width	305	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 305 mm (about 92 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	91.5 mm (3.60 in)
Overall diameter	716 mm (28.2 in)
Circumference	2,251 mm (88.6 in)
Revolutions	715 per mile · 444 per km

Similar sizes

Size	Overall diameter
295/35 R20	714 mm · -0.3%
305/35 R20	722 mm · +0.7%
295/30 R21	710 mm · -0.8%
315/30 R21	722 mm · +0.8%
285/35 R20	708 mm · -1.2%
295/25 R22	706 mm · -1.4%