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View 4 Products

P Zero (PZ4)

305/35R21 Y (109)

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.
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

^£298^.79

Quantity

P Zero

305/35R21 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.
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.
A70 dB
External Noise

Noise Emission / Exterior Noise: A (70 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

^£436^.72

Quantity

Pilot Sport EV

305/35R21 Y (109)

5.0/5

(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.
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.
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.

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

^£455^.79

Quantity

Winter SottoZero 3

305/35R21 W (109)

4.5/5

(4 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.
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.
A71 dB
External Noise

Noise Emission / Exterior Noise: A (71 dB)
How loud the tyre is from outside the car, measured in decibels. Graded A to C, where A is the quietest.

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.
Winter

Winter tyres:
Designed for temperatures below 7°C. Summer tyre rubber hardens in the cold and loses grip, while a winter compound stays soft and holds the road in cold, wet and snowy conditions.

Fit from:18-10-2026

Fully Fitted Price

^£525^.18

Quantity

You've viewed 4 of 4 products

305/35 R21 Tyre Reviews

Overall rating4.7/5

Based on 6 reviews

Declan Aaryan

I am satisfied with these tyres so far.

Pirelli Winter SottoZero 3

Husain F.

Impressive control on different kinds of snowy terrain.

Pirelli Winter SottoZero 3

Marlon Alfie-Jay

I anticipated a significant enhancement in driving and comfort with the new tyres, but I did not observe much difference.

Pirelli Winter SottoZero 3

305/35 R21 Tyre Reviews

4.7/56 reviews

Showing 1–6 of 6 reviews

About these reviews

Tyre reviews recording 305/35 R21, across tyre brands and tread ranges. Each review identifies its tyre range.

4/5

Pirelli Winter SottoZero 3

I am satisfied with these tyres so far.

5/5

Pirelli Winter SottoZero 3

Impressive control on different kinds of snowy terrain.

4/5

Pirelli Winter SottoZero 3

I anticipated a significant enhancement in driving and comfort with the new tyres, but I did not observe much difference.

5/5

Pirelli Winter SottoZero 3

The car provides a better sense of stability on the road and some roundabouts are tackled with more confidence, providing better grip. a big improvement compared to the run flats.

5/5

Michelin Pilot Sport EV

Great stability, I feel more in control in the rain, should definitely be purchased.

5/5

305/35 R21 is a wide, low-profile tyre ideal for powerful SUVs and sports cars. The first number indicates the width. Here, 305 means the width is 305 millimetres. 35 is the sidewall height as a percentage of the width. Therefore, sidewall height is 35% of 305mm which is approximately 107mm. R21 implies that this is a radial tyre made for a 21-inch diameter rim. Therefore, this tyre has an overall diameter of 747mm. Due to the large wheel used by these vehicles, this tyre has a lower sidewall height. You can find 305/35 R21, including the XL version on Tyres.co.uk.

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)	35	Sidewall height as a percentage of the width - here, 35% of 305 mm (about 107 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	106.8 mm (4.20 in)
Overall diameter	747 mm (29.4 in)
Circumference	2,346 mm (92.4 in)
Revolutions	686 per mile · 426 per km

Similar sizes

Size	Overall diameter
315/30 R22	748 mm · +0.1%
295/40 R20	744 mm · -0.4%
305/40 R20	752 mm · +0.7%
295/35 R21	740 mm · -0.9%
315/35 R21	754 mm · +0.9%
285/40 R20	736 mm · -1.5%