315/40 R21 Tyres

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View 15 Products

Cross Contact LX Sport

315/40R21 H (111)

5.0/5

(6 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.
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.
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.

Fit from:03-09-2026

Fully Fitted Price

^£289⁸⁹

Quantity

Turanza 6

315/40R21 Y (111)

4.0/5

(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.
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.

Fit from:03-09-2026

Fully Fitted Price

^£293⁹⁶

Quantity

Advan Sport V107

315/40R21 Y (115)

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.
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.
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.

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:03-09-2026

Fully Fitted Price

^£298⁷²

Quantity

Eagle F1 (Asymmetric 6)

315/40R21 Y (115)

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.
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:03-09-2026

Fully Fitted Price

^£307⁸³

Quantity

Sport Contact 5 SUV

315/40R21 Y (111)

5.0/5

(5 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.

Fit from:03-09-2026

Fully Fitted Price

^£315⁷⁶

Quantity

Cross Contact LX Sport

315/40R21 V (115)

5.0/5

(6 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.
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:03-09-2026

Fully Fitted Price

^£319⁹⁷

Quantity

Sport Contact 6

315/40R21 Y (111)

3.8/5

(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.
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.

Fit from:03-09-2026

Fully Fitted Price

^£324⁷⁴

Quantity

Sport Contact 6

315/40R21 Y (115)

3.8/5

(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.
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:03-09-2026

Fully Fitted Price

^£330⁴⁶

Quantity

P Zero (PZ4)

315/40R21 Y (111)

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.

Fit from:03-09-2026

Fully Fitted Price

^£333²⁹

Quantity

Pilot Sport 4

315/40R21 Y (115)

4.7/5

(3 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.
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.

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:03-09-2026

Fully Fitted Price

^£355⁶¹

Quantity

Alenza Sport

315/40R21 V (115)

4.7/5

(14 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.

Fit from:03-09-2026

Fully Fitted Price

^£360⁵⁵

Quantity

Pilot Sport 4 SUV

315/40R21 Y (115)

3.7/5

(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:03-09-2026

Fully Fitted Price

^£366³⁴

Quantity

Latitude Sport 3

315/40R21 Y (111)

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.
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.

Fit from:03-09-2026

Fully Fitted Price

^£395³⁹

Quantity

Scorpion Zero All Season

315/40R21 Y (115)

5.0/5

(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.
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.

Great Fuel Efficiency

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:03-09-2026

Fully Fitted Price

^£517⁴⁵

Quantity

Passion P9S

315/40R21 W (111)

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.
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.

Car

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

Fit from:03-09-2026

Fully Fitted Price

^£117⁸⁰

Quantity

You've viewed 15 of 15 products

Tyres.co.uk stocks 315/40 R21 for your convenience, including the XL versions. 315/40 R21 is the rear tyre size for some Lamborghini Urus packages. 315 is the width in mm. The aspect ratio in this case (40) indicates that sidewall height is 126mm which is 40% of 315mm. R21 indicates a radial tyre that fits a 21-inch rim. With a sidewall of 126mm on a 21-inch rim, this brings the overall diameter to 785mm. Sidewalls of tyres protect the rim from damage by kerbs.

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)	40	Sidewall height as a percentage of the width - here, 40% of 315 mm (about 126 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	126.0 mm (4.96 in)
Overall diameter	785 mm (30.9 in)
Circumference	2,467 mm (97.1 in)
Revolutions	652 per mile · 405 per km

Equivalent sizes

Size	Overall diameter
325/35 R22	786 mm · +0.1%
315/35 R22	779 mm · -0.8%
325/40 R21	793 mm · +1.0%
295/40 R22	795 mm · +1.2%
295/45 R20	774 mm · -1.5%
305/35 R22	772 mm · -1.7%

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