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255/40 R18 - Best allseason tyres 2026 - market overview, tests, reviews

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Best tyres in tests (2026)

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1
Bridgestone Potenza Sport Evo
BridgestonePremium
Potenza Sport Evo
SPORTAUTO'26#1TYREREVIEWS'26#2SPORTSCARS'26#2
9.3
Price from£154
Expert summary
The Bridgestone Potenza Sport Evo is the successor to the multi-award-winning Potenza Sport, featuring ENLITEN Technology for enhanced performance. It delivers 5% shorter wet braking, 2% shorter dry braking, and 15% greater mileage compared to its predecessor, while achieving EU label A-grade wet grip.
Performance
Wet circle cornering
96%
Dry braking
90%
Wet handling
79%
+3
Aquaplaning - longitudal
55%
Exterior noise
35%
Comfort
17%
Test results
SPORTAUTO2026205/45 R17#1(Outstanding)
TYREREVIEWS2026235/35 R19#2(Highly recommended)
SPORTSCARS2026255/35 R19#2(Exemplary)
AUTOBILD2026255/45 R19#2(Exemplary)
ACE2026225/40 R18#3(Highly recommended)
AUTOBILD2026245/45 R19#11(Good)
AUTOBILD2026245/45 R19#11(-)
Price variants (1)
255/40 R18 99 Y
A C 72dB
£154
mytyres.co.uk
mytyres.co.uk
£154
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£181
In stock · Free shipping
Buy
2
Bridgestone Potenza Sport
BridgestonePremium
Potenza Sport
REIFENTESTER'25#1AUTOBILD'25#1ADAC'25#2
8.7
Price from£192
Expert summary
We really like the new Potenza Sport, as it’s more sporty and dynamic than the usual tyre in this category, but still perfectly usable and safe for everyday driving, which makes it unique. It’s rolling resistance, mileage and overall comfort are also on a good level, except for a slighty higher noise.
Performance
Wet handling
93%
Wet circle cornering
92%
Dry handling
81%
+4
Aquaplaning - cross
61%
Aquaplaning - longitudal
56%
Exterior noise
28%
Test results
REIFENTESTER2025225/40 R18#1(Very good)
AUTOBILD2025225/40 R18#1(-)
ADAC2025225/40 R18#2(Good)
AUTOZEITUNG2025225/45 R18#3(Highly recommended)
AUTOBILD2025225/40 R18#3(Exemplary)
TYREREVIEWS2025225/40 R18#6(-)
AUTOBILD2024225/55 R17#1(Exemplary)
AUTOBILD2024235/55 R19#3(Good)
AUTOBILD2024265/35 R19#4(Good)
AUTOBILD2023225/40 R18#2(Outstanding)
Price variants (1)
255/40 R18 99 Y
A C 72dB
£192
mytyres.co.uk
mytyres.co.uk
£192
In stock · Free shipping
Buy
3
Pirelli P Zero (PZ5)
PirelliPremium
P Zero (PZ5)
SPORTSCARS'26#3ACE'26#5TYREREVIEWS'25#1
8.8
Price from£196
Expert summary
A driver's tyre through and through. The P Zero PZ5 took first place in dry handling and posted the best aquaplaning speed in test — sporty, but with real safety margins. Wet handling is the weak spot, so this one's for those who value dry grip and aquaplaning resistance above all.
Performance
Wet circle cornering
100%
Aquaplaning - cross
92%
Aquaplaning - longitudal
83%
+2
Exterior noise
66%
Wet handling
56%
Wet braking
51%
Test results
SPORTSCARS2026255/35 R19#3(Good)
ACE2026225/40 R18#5(Recommended)
TYREREVIEWS2025225/40 R18#1(Test winner)
Price variants (1)
255/40 R18 99 Y
A C 73dB
£196
mytyres.co.uk
mytyres.co.uk
£196
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£202
In stock · Free shipping
Buy
4
Hankook Ventus Evo
HankookPremium
Ventus Evo
AUTOBILD'26#1AUTOBILD'26#1AUTOBILD'26#2
9.9
Price from£158
Expert summary
Hankook tyres are getting better with every new generation and the Ventus Evo is the latest evolution. It aims for the stars with excellent dry and wet handling, best-in-test wet braking and top aquaplaning speed, while producing very low exterior noise. The only notable weakness is higher rolling resistance. Still, it is a premium tyre for slightly less than a premium price.
Performance
Wet circle cornering
100%
Dry handling
100%
Wet braking
99%
+2
Exterior noise
85%
Aquaplaning - longitudal
82%
Aquaplaning - cross
70%
Test results
AUTOBILD2026245/45 R19#1(Exemplary)
AUTOBILD2026255/45 R19#1(Exemplary (test winner))
AUTOBILD2026245/45 R19#2(-)
TYREREVIEWS2026225/45 R17#3(Highly recommended)
AUTOBILD2025225/40 R18#3(-)
AUTOBILD2025225/40 R18#5(Exemplary)
Price variants (1)
255/40 R18 99 Y *
A A 69dB
£158
mytyres.co.uk
mytyres.co.uk
£158
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£195
In stock · Free shipping
Buy
5
Continental PremiumContact 7
ContinentalPremium
PremiumContact 7
NETZWELT'26#1REIFENTESTER'26#1AUTOZEITUNG'26#1
9.8
Price from£189
Expert summary
Continental did it again with the PremiumContact 7. It’s an incredibly well balanced tire with just the right wet and dry grip and above average mileage. Since it’s launch in 2023 it got nothing but the best results in the tests, the only downside being it’s premium price.
Performance
Wet braking
93%
Wet circle cornering
91%
Wet handling
87%
+4
Aquaplaning - longitudal
65%
Interior noise
53%
Exterior noise
40%
Test results
NETZWELT2026205/55 R16#1(Highly recommended)
REIFENTESTER2026235/55 R18#1(Good)
AUTOZEITUNG2026235/45 R18#1(Highly recommended)
ADAC2026225/50 R17#1(Good)
TYREREVIEWS2026225/45 R17#1(Test winner)
SPORTAUTO2026205/45 R17#4(Very good)
AUTOBILD2026245/45 R19#6(Good)
AUTOBILD2026245/45 R19#6(-)
TYREREVIEWS2025225/50 R17#1(Test winner)
AFTONBLADET2025225/45 R17#2(Outstanding)
Price variants (1)
255/40 R18 99 Y mfs XL MO£189
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£189
In stock · Free shipping
Buy
mytyres.co.uk
mytyres.co.uk
£208
In stock · Free shipping
Buy
6
Goodyear Eagle F1 Asymmetric 6
GoodyearPremium
Eagle F1 Asymmetric 6
AUTOZEITUNG'26#2AUTOBILD'26#2SPORTAUTO'26#2
9.4
Price from£171
Expert summary
The Asymmetric 6 is the latest addition in the Eagle F1 range, offering great compromise between every day comfort and sporty driving. While it has dynamic steering response, it’s also very good on wet and has a low rolling resistance. Definitely recommended!
Performance
Comfort
96%
Exterior noise
89%
Wet circle cornering
88%
+4
Wet braking
70%
Aquaplaning - cross
70%
Interior noise
23%
Test results
AUTOZEITUNG2026235/45 R18#2(Highly recommended)
AUTOBILD2026245/45 R19#2(Exemplary)
SPORTAUTO2026205/45 R17#2(Very good)
AUTOBILD2026255/45 R19#4(Exemplary)
AUTOBILD2026245/45 R19#8(-)
AUTOBILD2025255/55 R18#1(Exemplary)
AUTOZEITUNG2025225/45 R18#1(Highly recommended)
AUTOBILD2025225/40 R18#1(Exemplary)
AUTOBILD2025245/35 R19#2(Exemplary)
TYREREVIEWS2025225/40 R18#4(Highly recommended)
Price variants (1)
255/40 R18 99 W
A A 69dB
£171
mytyres.co.uk
mytyres.co.uk
£171
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£191
In stock · Free shipping
Buy
7
Michelin Pilot Sport 5
MichelinPremium
Pilot Sport 5
AUTOBILD'26#3SPORTAUTO'26#5AUTOBILD'26#9
9.4
Price from£197
Expert summary
The Pilot Sport range from Michelin is now almost legendary, with the Cup variants being the fastest road legal tyres available. But the ‚ordinary‘ Pilot Sport 5 not as spory as it’s name suggest - it’s incredibly well balanced, with the priority being low rolling resistance and high mileage over sporty handling. It’s still a Michelin tire, so higher price is to be expected.
Performance
Dry handling
86%
Wet circle cornering
82%
Wet braking
73%
+3
Aquaplaning - longitudal
67%
Comfort
33%
Exterior noise
26%
Test results
AUTOBILD2026245/45 R19#3(Exemplary)
SPORTAUTO2026205/45 R17#5(Good)
AUTOBILD2026245/45 R19#9(-)
AUTOBILD2025225/40 R18#2(-)
AUTOBILD2025225/40 R18#2(Exemplary)
ADAC2025225/40 R18#3(Good)
AUTOZEITUNG2025225/45 R18#4(Highly recommended)
REIFENTESTER2025225/40 R18#4(Good)
SPORTAUTO2024215/40 R18#2(Very good)
AUTOBILD2023225/45 R18#2(Outstanding)
Price variants (2)
255/40 R18 99 Y mfs XL
A C 72dB
£200
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£200
In stock · Free shipping
Buy
mytyres.co.uk
mytyres.co.uk
£213
In stock · Free shipping
Buy
255/40 R18 99 W XL MO
A B 72dB
£197
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£197
In stock · Free shipping
Buy
mytyres.co.uk
mytyres.co.uk
£199
In stock · Free shipping
Buy
8
Kumho Ecsta Sport (PS72)
KumhoUpper-middle
Ecsta Sport (PS72)
TYREREVIEWS'26#4AUTOBILD'26#4AUTOBILD'26#6
8.7
Price from£122
Expert summary
A solid all-rounder at a fair price. The Kumho Ecsta Sport PS72 blends dry and wet grip with sporty, predictable steering and offers no dramatic weaknesses. Aquaplaning resistance and comfort are its weaker spots, but you're getting upper-middle performance for less than you'd expect.
Performance
Wet circle cornering
69%
Wet braking
63%
Dry braking
58%
+2
Exterior noise
39%
Dry handling
39%
Aquaplaning - cross
33%
Test results
TYREREVIEWS2026225/45 R17#4(Recommended)
AUTOBILD2026245/45 R19#4(-)
AUTOBILD2026245/45 R19#6(Good)
AUTOBILD2026255/45 R19#6(Good)
ACE2026225/40 R18#7(Recommended)
REIFENTESTER2025225/40 R18#1(Very good)
Price variants (2)
255/40 R18 99 Y
A C 71dB
£122
mytyres.co.uk
mytyres.co.uk
£122
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£141
In stock · Free shipping
Buy
255/40 R18 99 Y
A C 71dB
£124
mytyres.co.uk
mytyres.co.uk
£124
In stock · Free shipping
Buy
9
Pirelli Cinturato P7 C2
PirelliPremium
Cinturato P7 C2
AFTONBLADET'25#3AUTOZEITUNG'24#2AUTOBILD'24#6
8.8
Price from£176
Expert summary
The upgraded version of the legendary P7 has a good steering response and low rolling resistance, which makes sense as it's often a first equipment of many car manufacturers.
Performance
Dry braking
82%
Interior noise
76%
Wet braking
75%
+4
Wet circle cornering
66%
Aquaplaning - cross
47%
Comfort
42%
Test results
AFTONBLADET2025225/45 R17#3(Outstanding)
AUTOZEITUNG2024225/45 R17#2(Highly recommended)
AUTOBILD2024225/55 R17#6(Good)
TYREREVIEWS2023205/55 R16#2(Highly recommended)
AUTOKLUBCR2023205/55 R16#4(-)
ADAC2023205/55 R16#17(Good)
AUTOBILD2021205/55 R16#2(-)
AUTOBILD2021205/55 R16#7(Good)
ADAC2021225/50 R17#9(Satisfactory)
Price variants (3)
255/40 R18 99 Y
B A 71dB
£176
mytyres.co.uk
mytyres.co.uk
£176
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£177
In stock · Free shipping
Buy
255/40 R18 99 Y XL *
B B 70dB
£226
mytyres.co.uk
mytyres.co.uk
£226
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£243
In stock · Free shipping
Buy
255/40 R18 99 Y XL
A A 72dB
£184
mytyres.co.uk
mytyres.co.uk
£184
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£213
In stock · Free shipping
Buy
10
Firestone Roadhawk 2
FirestoneUpper-middle
Roadhawk 2
NETZWELT'26#3ADAC'26#4AUTOZEITUNG'26#4
8.1
Price from£122
Expert summary
Firestone, the affordable brand belonging to the Bridgestone group, has a fresh addition to their lineup - the Roadhawk 2. And it seems like it’s set off for success - it offers the Bridgestone’s ENLITEN technology, which makes the rolling resistance and mileage exceptional for a budget tyre and it combines it with safe behavior on wet and dry.
Performance
Aquaplaning - cross
74%
Aquaplaning - longitudal
69%
Wet circle cornering
64%
+3
Dry braking
25%
Comfort
17%
Exterior noise
10%
Test results
NETZWELT2026205/55 R16#3(Recommended)
ADAC2026225/50 R17#4(Satisfactory)
AUTOZEITUNG2026235/45 R18#4(Recommended)
AUTOMOTORSPORT2026195/55 R16#5(Good)
SPORTAUTO2026205/45 R17#7(Sufficient)
AUTOBILD2025215/55 R18#6(Satisfactory)
TYREREVIEWS2025225/50 R17#6(Satisfactory)
AUTOZEITUNG2024225/45 R17#5(Highly recommended)
Price variants (2)
255/40 R18 99 Y XL EVc
A B 72dB
£157
mytyres.co.uk
mytyres.co.uk
£157
In stock · Free shipping
Buy
255/40 R18 99 Y
A B 72dB
£122
mytyres.co.uk
mytyres.co.uk
£122
In stock · Free shipping
Buy
11
Bridgestone Turanza T005
BridgestonePremium
Turanza T005
MOTOR'25#4SPORTAUTO'24#3AUTOKLUBCR'23#3
8.8
Price from£156
Expert summary
The Turanza T005 was introduced in 2018, but still stands as a great tyre, offered in incredible 350 different sizes. It’s universal also in it’s properties - it’s a balanced mix of wet and dry performance with above-average rolling resistance.
Performance
Dry braking
80%
Wet handling
77%
Wet circle cornering
72%
+4
Aquaplaning - longitudal
57%
Comfort
42%
Exterior noise
24%
Test results
MOTOR2025205/55 R16#4(Recommended)
SPORTAUTO2024215/40 R18#3(Very good)
AUTOKLUBCR2023205/55 R16#3(-)
TYREREVIEWS2023205/55 R16#3(Highly recommended)
ADAC2023205/55 R16#4(Good)
AUTOBILD2022215/55 R17#1(-)
AUTOZEITUNG2022215/55 R17#1(Highly recommended)
AUTOMOTORSPORT2022245/45 R19#2(Very good)
ADAC2022185/65 R15#2(Good)
ADAC2022215/60 R16#3(Good)
Price variants (5)
255/40 R18 99 Y £237
mytyres.co.uk
mytyres.co.uk
£237
In stock · Free shipping
Buy
255/40 R18 99 Y runflat
B B 71dB
£197
mytyres.co.uk
mytyres.co.uk
£197
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£210
In stock · Free shipping
Buy
255/40 R18 99 Y *
B A 71dB
£156
mytyres.co.uk
mytyres.co.uk
£156
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£182
In stock · Free shipping
Buy
255/40 R18 99 Y
A B 69dB
£208
mytyres.co.uk
mytyres.co.uk
£208
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£220
In stock · Free shipping
Buy
12
Hankook Ventus S1 evo3 K127
HankookPremium
Ventus S1 evo3 K127
REIFENTESTER'25#4AUTOZEITUNG'24#3AUTOBILD'23#1
8.1
Price from£128
Expert summary
Hankook Ventus tyres are designed to offer a very sporty experience for affordable price, which is also the case for evo3. It’s also safe on wet and got short braking distances, the only drawback being lower mileage.
Performance
Wet braking
75%
Wet circle cornering
69%
Wet handling
67%
+4
Aquaplaning - longitudal
38%
Comfort
34%
Aquaplaning - cross
24%
Test results
REIFENTESTER2025225/40 R18#4(Good)
AUTOZEITUNG2024225/45 R17#3(-)
AUTOBILD2023225/45 R18#1(-)
TYREREVIEWS2023225/40 R18#4(Recommended)
AUTOBILD2023225/40 R18#6(Good)
ACE2023225/45 R18#7(Highly recommended)
AUTOBILD2023225/45 R18#12(Satisfactory)
AUTOMOTORSPORT2022245/45 R19#3(Very good)
TYREREVIEWS2022225/45 R17#3(Recommended)
AUTOBILD2022245/40 R19#3(Exemplary)
Price variants (1)
255/40 R18 99 Y
A C 73dB
£128
mytyres.co.uk
mytyres.co.uk
£128
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£165
In stock · Free shipping
Buy
13
Falken Azenis FK520
FalkenUpper-middle
Azenis FK520
SPORTAUTO'26#3ACE'26#4AUTOBILD'26#8
8.0
Price from£123
Expert summary
One of the cheaper tyres that can be recommended as it hasn't failed a single test and is often rated as a economical choice. It's surprisingly quiet, so if you are looking for a good and comfortable tyre, Azenis FK520 could be a tyre for you.
Performance
Exterior noise
84%
Comfort
83%
Aquaplaning - longitudal
70%
+4
Aquaplaning - cross
47%
Wet handling
32%
Interior noise
17%
Test results
SPORTAUTO2026205/45 R17#3(Very good)
ACE2026225/40 R18#4(Highly recommended)
AUTOBILD2026255/45 R19#8(Satisfactory)
AUTOBILD2026245/45 R19#13(Good)
AUTOBILD2026245/45 R19#14(-)
AUTOBILD2025255/55 R18#2(Exemplary)
TYREREVIEWS2025225/40 R18#5(Recommended)
ADAC2025225/40 R18#8(Good)
AUTOZEITUNG2025225/45 R18#8(-)
AUTOMOTORSPORT2024235/55 R18#7(Good)
Price variants (2)
255/40 R18 99 Y £123
mytyres.co.uk
mytyres.co.uk
£123
In stock · Free shipping
Buy
255/40 R18 99 Y XL runflat NBLK£155
mytyres.co.uk
mytyres.co.uk
£155
In stock · Free shipping
Buy
14
Kumho Ecsta PS71
KumhoUpper-middle
Ecsta PS71
AUTOBILD'25#4AUTOBILD'25#6ADAC'25#13
8.6
Price from£128
Expert summary
The Kumho Ecsta PS71 has been around for a while and keeps showing up well in tests. Strong aquaplaning resistance, short braking distances, and balanced handling across conditions make it a dependable choice. Comfort and noise are where it compromises.
Performance
Aquaplaning - longitudal
91%
Aquaplaning - cross
87%
Wet braking
64%
+3
Dry braking
49%
Exterior noise
27%
Interior noise
23%
Test results
AUTOBILD2025225/40 R18#4(-)
AUTOBILD2025225/40 R18#6(Exemplary)
ADAC2025225/40 R18#13(Satisfactory)
AUTOBILD2023225/45 R18#5(Good)
ACE2023225/45 R18#7(Highly recommended)
AUTOBILD2023225/45 R18#12(-)
TYREREVIEWS2022255/35 R19#6(-)
ADAC2021225/50 R17#3(Good)
Price variants (1)
255/40 R18 99 Y
A D 71dB
£128
mytyres.co.uk
mytyres.co.uk
£128
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£134
In stock · Free shipping
Buy
15
Maxxis Victra Sport 5
MaxxisBudget
Victra Sport 5
REIFENTESTER'25#4AUTOBILD'25#10AUTOBILD'25#12
8.1
Price from£140
Expert summary
A budget tyre with real wet grip — that's rare. The Maxxis Victra Sport 5 handles wet roads confidently, brakes well, and stays quiet. The delayed steering response takes getting used to, but at this price point, the overall safety package is hard to argue with.
Performance
Wet circle cornering
77%
Interior noise
73%
Dry braking
65%
+4
Aquaplaning - cross
53%
Comfort
50%
Wet braking
45%
Test results
REIFENTESTER2025225/40 R18#4(Good)
AUTOBILD2025225/40 R18#10(-)
AUTOBILD2025225/40 R18#12(Satisfactory)
SPORTAUTO2024215/40 R18#4(Very good)
ACE2024225/45 R17#7(Recommended)
GUTE-FAHRT2023235/35 R19#4(Good)
ACE2023225/45 R18#6(Highly recommended)
AUTOBILD2023225/45 R18#9(-)
SPORTAUTO2023225/40 R18#9(Good)
AUTOBILD2023225/40 R18#10(Satisfactory)
Price variants (1)
255/40 R18 99 Y XL£140
mytyres.co.uk
mytyres.co.uk
£140
In stock · Free shipping
Buy
16
Pirelli P Zero PZ4
PirelliPremium
P Zero PZ4
AUTOBILD'25#3AUTOZEITUNG'25#5AUTOBILD'25#20
8.9
Price from£187
Expert summary
The P Zero range is with us for a long time, also being a favorite choice for car manufacturers as first equipment. It’s a good, well balanced and enjoyable tyre. It tends to get quite a few mid-life updates so make sure you get the latest one.
Performance
Wet circle cornering
95%
Wet handling
89%
Dry handling
72%
+3
Wet braking
63%
Aquaplaning - cross
53%
Aquaplaning - longitudal
46%
Test results
AUTOBILD2025245/35 R19#3(Exemplary)
AUTOZEITUNG2025225/45 R18#5(Highly recommended)
AUTOBILD2025225/40 R18#20(-)
GUTE-FAHRT2023235/35 R19#2(Very good -)
AUTOBILD2023225/40 R18#3(Outstanding)
AUTOBILD2023225/45 R18#3(-)
AUTOZEITUNG2023235/35 R19#4(Highly recommended)
SPORTAUTO2023225/40 R18#5(Very good)
ACE2023225/45 R18#5(Highly recommended)
AUTOBILD2023225/45 R18#11(Satisfactory)
Price variants (2)
255/40 R18 99 Y
A C 69dB
£187
mytyres.co.uk
mytyres.co.uk
£187
In stock · Free shipping
Buy
tyres-pneus-online.co.uk
tyres-pneus-online.co.uk
£203
In stock · Free shipping
Buy

Cars with 255/40 R18 tyres

Z4 2019
Z4
2019
4er-Reihe 2017
4er-Reihe
2017
3er-Reihe 2015
3er-Reihe
2015
A4 2004
A4
2004
A6 2001
A6
2001

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Customer reviews

1221 customer reviews for tyres in this size

255/40 R18 — Also available in

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255/40 R18 doesn't belong to the most popular dimensions for summer tyres - there are 42 tyre models available, which can be compared to 205/50 R16, 225/65 R17, 205/65 R16. Let's break down the sizing - 40 is height of the tyre, which is calculated as 40% of the tyre width (255mm), which means the sidewall height has 102 mm. The wheel diameter is R18, which means it fits to a 18 inch/457.2mm diameter wheel. The total circumference of the tyre is 2077.22 mm, which is very similar to 255/35 R19(2076.91 mm), 255/45 R17(2077.54 mm), 255/30 R20(2076.59 mm), 215/65 R15(2075.02 mm), 305/25 R20(2075.02 mm), 195/65 R16(2073.14 mm), 225/40 R19(2081.62 mm). There are multiple speed indexes available for summer tyres in 255/40 R18: V(240km/h), W(270km/h), Y(300km/h). The same goes for weight indexes: 95, 99. You can find 255/40 R18 on 14 car models - mainly .

255/40 R18 is found on 14 vehicles:

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