315/30 R21 Tyres

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View 8 Products

Eagle F1 Supersport

315/30R21 Y (105)

2.0/5

(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.
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

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:19-10-2026

Fully Fitted Price

^£338^.19

Quantity

Sport Contact 5P

315/30R21 Y (105)

4.0/5

(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.
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

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:19-10-2026

Fully Fitted Price

^£360^.68

Quantity

P Zero

315/30R21 Y (105)

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.
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:19-10-2026

Fully Fitted Price

^£367^.72

Quantity

P Zero (PZ4)

315/30R21 Y (105)

4.8/5

(4 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.
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.

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:19-10-2026

Fully Fitted Price

^£382^.49

Quantity

Pilot Sport 4

315/30R21 Y (105)

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:19-10-2026

Fully Fitted Price

^£404^.20

Quantity

Eagle F1 Supersport R

315/30R21 Y (105)

4.8/5

(17 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.
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:19-10-2026

Fully Fitted Price

^£414^.50

Quantity

P Zero (PZ4) Elect

315/30R21 Y (105)

4.7/5

(14 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.
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.

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:19-10-2026

Fully Fitted Price

^£436^.79

Quantity

Pilot Sport 4 S

315/30R21 Y (105)

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:19-10-2026

Fully Fitted Price

^£460^.66

Quantity

You've viewed 8 of 8 products

315/30 R21 Tyre Reviews

Overall rating4.7/5

Based on 46 reviews

Natalie Keah

Fitting was done quickly, I have no complaints.

Pirelli P Zero (PZ4) Elect

Adam Mehwish

Driving on these is a pleasure, calm and quiet. I am really happy with them.

Pirelli P Zero (PZ4) Elect

Yuki F.

Exceptional grip levels. The ride is very quiet. Good handling in wet conditions. Expected performance on ice.

Pirelli P Zero

315/30 R21 Tyre Reviews

4.7/546 reviews

Showing 1–10 of 46 reviews

About these reviews

Tyre reviews recording 315/30 R21, across tyre brands and tread ranges. Each review identifies its tyre range.

4/5

Pirelli P Zero (PZ4) Elect

Fitting was done quickly, I have no complaints.

5/5

Pirelli P Zero (PZ4) Elect

Driving on these is a pleasure, calm and quiet. I am really happy with them.

5/5

Pirelli P Zero

Exceptional grip levels. The ride is very quiet. Good handling in wet conditions. Expected performance on ice.

5/5

Goodyear Eagle F1 Supersport R

Best performance tyre I have ever used.

5/5

Goodyear Eagle F1 Supersport R

The tyres were fitted quickly and with lots of professionalism.

5/5

Pirelli P Zero (PZ4) Elect

An extremely positive experience with the fitting process.

5/5

Continental Sport Contact 5P

Brilliantly performed, even during a Track Day at Spa-Francorchamp circuit.

5/5

Michelin Pilot Sport 4 S

Wonderful! The car feels much more stable and has great grip, even on cool days.

5/5

Michelin Pilot Sport 4

Outstanding tyre excellent for both wet and dry weather, in addition it has low road noise.

5/5

Goodyear Eagle F1 Supersport R

These tyres especially have grip that exceeds expectations in wet conditions. Compared to my last pair of tyres, I have seen a large increase in performance. The fitting process was simple and the team ensured everything was to a standard before I left the garage.

315/30 R21 is a rear tyre size for high-performance sports cars and grand tourers. To break it down, the first number is the tyre width, which is 315 millimetres. The second number is the aspect ratio and is commonly known as the sidewall. In this case, the sidewall is 94 millimetres (30% of 315mm). R21 means it's a radial tyre with a 21-inch diameter rim. The overall diameter of the tyre is 722 millimetres. Due to the low sidewall, the tyre will have a stiffer sidewall and will absorb bumps less. We have the 315/30 R21 tyre in stock, including the XL versions, at Tyres.co.uk.

Part of the size	Value	What it means
Section width	315	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 315 mm (about 94 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	94.5 mm (3.72 in)
Overall diameter	722 mm (28.4 in)
Circumference	2,269 mm (89.3 in)
Revolutions	709 per mile · 441 per km

Similar sizes

Size	Overall diameter
305/35 R20	722 mm · -0.1%
335/25 R22	726 mm · +0.5%
305/30 R21	716 mm · -0.8%
325/30 R21	728 mm · +0.8%
315/35 R20	728 mm · +0.8%
295/35 R20	714 mm · -1.1%