325/30 R21 Tyre Reviews

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View 10 Products

Potenza Sport

325/30R21 Y (108)

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

^£329^.91

Quantity

Sport Contact 7

325/30R21 Y (108)

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.
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.

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

^£341^.98

Quantity

Pilot Sport 4 S

325/30R21 Y (108)

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.
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:19-10-2026

Fully Fitted Price

^£422^.92

Quantity

Pilot Super Sport

325/30R21 Y (108)

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

^£445^.07

Quantity

Pilot Sport 4

325/30R21 Y (108)

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.
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

^£469^.84

Quantity

Pilot Sport S 5

325/30R21 Y (108)

4.6/5

(10 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.
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:19-10-2026

Fully Fitted Price

^£485^.02

Quantity

P Zero Corsa (PZC4)

325/30R21 Y (108)

4.9/5

(8 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.
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:19-10-2026

Fully Fitted Price

^£515^.18

Quantity

Pilot Sport Cup 2

325/30R21 Y (108)

4.5/5

(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.
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

^£519^.52

Quantity

Eagle F1 Supersport RS

325/30R21 Y (108)

4.9/5

(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.
D
Wet Grip

Wet Grip / Braking Performance: D
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:19-10-2026

Fully Fitted Price

^£560^.92

Quantity

Passion P9S

325/30R21 W (104)

5.0/5

(1 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.
BB dB
External Noise

Noise Emission / Exterior Noise: B (B 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.

Fit from:19-10-2026

Fully Fitted Price

^£181^.19

Quantity

You've viewed 10 of 10 products

Overall rating4.8/5

Based on 48 reviews

Marnie-Rae Merryn

Functions correctly in all weather conditions. Always make sure the tyres are matched.

Michelin Pilot Sport 4

Finlay Gillett

Very well - as anticipated.

Pirelli P Zero

Daniel Isa

No problems here, everything was well packaged for delivery.

Goodyear Eagle F1 Supersport RS

325/30 R21 Tyre Reviews

4.8/548 reviews

Showing 11–20 of 48 reviews

About these reviews

Tyre reviews recording 325/30 R21, across tyre brands and tread ranges. Each review identifies its tyre range.

5/5

Kustone Passion P9S

Would definitely recommend these wheels, they handle excellently and make for a smooth ride, very pleased with the purchase.

4/5

I have used four sets of the Cup 2 tyres. Every year, I do about 2,500 track kilometres at different locations including CTMP, Watkins Glen, Mid-Ohio, VIR, Atlanta, and Daytona. I always feel confident with these tyres and on average, I use two sets a year. I am able to keep up with people who use slicks.

5/5

Michelin Pilot Sport S 5

Performed successfully in heavy rain and light snow.

5/5

Pirelli P Zero Corsa (PZC4)

The tyres feel great as well as produce excellent results.

5/5

Pirelli P Zero Corsa (PZC4)

Impressed with grip in wet conditions.

5/5

Goodyear Eagle F1 Supersport RS

The fit and the look on my car is excellent.

5/5

Pirelli P Zero Corsa (PZC4)

Your feedback and responsiveness is excellent, and I am very pleased overall.

5/5

Michelin Pilot Sport S 5

My car has gone over 10,000 miles with these Michelin Pilot Sport S 5 tyres, and I can say the difference is huge. My car feels more nimble now. cornering feels more stable and I can drive confidently whether the road is dry or wet. I appreciate being able to enjoy my drives even more with my added confidence to push harder. And the price is a reasonable increase from the budget options. I don't see why I would switch back to others before enhancing my driving experience even more.

5/5

Goodyear Eagle F1 Supersport RS

Fantastic service, will return for tyre services again.

4/5

Michelin Pilot Sport 4

The performance of the tyres was acceptable, other than one getting a screw in it soon after buying the tyres. However, both tyres appeared to lose air quicker than my last set of tyres.

325/30 R21 is the rear tyre size for Porsche 911 GT3 RS and GT2 RS models from the 991 generation. The meaning of the numbers is simple. 325 means the tyre width in millimetres. 30 means the tyre has an aspect ratio of 30%, resulting in a sidewall of 98mm. R21 means the tyre is of radial construction and is fitted to a 21-inch rim, resulting in an overall diameter of 728mm. The sidewall of 98mm is in line with the staggered layout. The XL versions are dominant, and we stock them at Tyres.co.uk.

Part of the size	Value	What it means
Section width	325	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 325 mm (about 98 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	97.5 mm (3.84 in)
Overall diameter	728 mm (28.7 in)
Circumference	2,288 mm (90.1 in)
Revolutions	703 per mile · 437 per km

Similar sizes

Size	Overall diameter
315/35 R20	728 mm · +0.0%
335/25 R22	726 mm · -0.3%
315/30 R21	722 mm · -0.8%
305/35 R20	722 mm · -0.9%
325/35 R20	736 mm · +1.0%
305/30 R21	716 mm · -1.6%