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Home  >  255 / 40 21  >  Dynamo  >  Dynamo 255 / 40 21
Identify the size of your tyre
The exact dimensions of a tyre can be found on the sidewall printed mark. The graphic shows how to read properties and dimensions of the tyre:
 
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SPEED INDEX:
The speed index indicates the maximum speed intended for the tyre. Up to this value, the manufacturer guarantees optimum operation with the appropriate tyre pressure. The maximum speed allowed for this vehicle is given in the vehicle owner's manual; this information can be used to select the appropriate speed index for the tyre. The speed index is the last mark on the sidewall of the tyre.
 
Load Index
Permissible maximum axle load per tyre in kg. To be found in the registration certificate or vehicle registration document or read directly from the tyre (two-digit number). It is permitted to fit a tyre with a higher load index.
 
Driving safety despite puncture
Runflat tyres are puncture-resistant tyres with reinforced sidewalls. This creates the so-called run-flat property. In the event of damage, this allows the vehicle to continue driving up to a distance of approx. 100 km (and even beyond depending on the product) at a maximum speed of 80 km/h, even if the pressure has been completely lost. Run-flat tyres even prevent the tyre rubber from jumping off the rim in the event of a loss of air pressure. A flat tyre is therefore still a flat tyre, but it loses some of its drama. Note: All run-flat tyres are marked with the symbol "RSC" (Runflat System Component) and may only be fitted in vehicles with a functioning air pressure control system!
 
Tyres with increased load capacity
Reinforced tyres are designed for higher loads than normal tyres. They can be identified by the designation 'RF' (reinforced) or also 'XL' or 'Extra Load'. They are used on vans, minibuses, off-road vehicles, etc. However, their mounting alone does not automatically result in higher load capacity but also requires a correspondingly higher air pressure. Furthermore, the load capacity index specified in the vehicle documents continues to apply.
 
Tyres with extra high load capacity
The "C" in the term C tyres stands for "commercial". These tyres are specially designed for commercial vehicles. These can be, for example, lighter trucks, delivery vans, flatbed trucks or panel vans. In other words: vehicles that have to move higher loads at a comparatively lower speed. The multi-ply reinforced C tyres are therefore even more load-bearing than reinforced tyres.
 
Mobility-optimised tyres
A tyre with a sealing layer on the opposite side of the tyre tread. In the event of a puncture (e.g. by a nail), this layer blocks any loss of air, even if the foreign body causing the puncture is still in the tyre. It is not necessary to stop or change the tyres immediately at the roadside.
 
Mobility-optimised tyres
A tyre with a sealing layer on the opposite side of the tyre tread. In the event of a puncture (e.g. by a nail), this layer blocks any loss of air, even if the foreign body causing the puncture is still in the tyre. It is not necessary to stop or change the tyres immediately at the roadside.
 
Tyres optimised for electric vehicles.
Tyre developed for electric vehicles. These tyres can also be used without hesitation on vehicles with other drive systems.
 

Our offer for  Dynamo   255/40  21     

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Pirelli Scorpion
Pirelli
Pirelli
Scorpion
255/40 R21 102V XL LK

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip ANoise emissions 71dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(12)
Average based on 12 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven4690600
20.08.2022fromMichael
Slightly noisier at low speeds than I had expected (my Cooper winter tyres are quieter) although the relative noise abates at higher speeds. They&#39;re pretty firm on bumpy roads where I drive most often. Superb for motorway driving in terms of low noise and excellent ride comfort.
01.08.2020fromRob
Great wearing tyre, plenty of grip in the wet and dry. Wearing better the Goodyear F1&#39;s I had on the car before. Will definitely buy again.
29.04.2020fromMr Doorbar
These tyres were OE on my 2017 Passat Estate so I stuck with the same when it came to replacing the fronts. I&#39;m still on the original rears. The fronts did around 24K miles while the tread left of the rears gives me around another 10K at least. However, the tyres walls on the rear have slight cracking even though they haven&#39;t been curbed and if get worst it will become an MOT failure at the cars first MOT this year. The one area where these tyres are weakest are the road noise. I&#39;m sure there are quieter tyres out there but they may be weaker in other areas. On the whole these Pirellis are more than suitable for any family car.
15.01.2019fromGlynne Gianelli
Seems quieter and more comfortable. Grip very good and economy improved as well.
(12)

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just  301.15 £
limited stock
Details
Michelin Pilot Sport 4 SUV
Michelin
Michelin
Pilot Sport 4 SUV
255/40 R21 102Y XL Acoustic AO, EV Suitable

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip BNoise emissions 71dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(1)
Average based on 1 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven373000
15.09.2024fromTimbo
Vast improvement in all areas compared to the Dunlops that came off. Particularly comfort and noise are extremely good! Fuel consumption is better, and they&#39;re a good looking tyre also! :-)
(1)

Reifentest.com

just  309.42 £
available
Details
Pirelli P Zero PZ4 SC
Pirelli
Pirelli
P Zero PZ4 SC
255/40 R21 102Y XL PNCS R0

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip ANoise emissions 72dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(15)
Average based on 15 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven2702975
18.09.2022fromDAVID
These are as close to perfect summer tyres that I have come across in more than 50+ years of spirited driving. Wet grip is of great importance, and these tyres are actually AO, which I always purchase, as I understand that grip was paramount in AUDIs requirements. The car is a modified 25th Anniversary model and is fitted with SACHS Race Engineering Coil-Over suspension. The cylinder head has been ported and polished with the motor now producing well over 200 ps.
14.06.2021fromy2kdisease
Car had 20&quot; 245/35r20 runflats in front and 275/30r20 runflats (all MOE) for RWD w213 luxury saloon. The car came with these factory fitted MOE runflat tyres. I&#39;ve Replaced these tyres and wheels at 10600km. I&#39;ve driven 8600km of that mileage. The tyres wore like rubber bands on the 20&quot; wheels. Steering as a result is very precise in both wet and dry. Front 245/30s have sound deadening foam and overall tyre noise is quiet in the cabin (but just wee bit louder than the 18&quot; PS4 tyres I replaced them with). Ride comfort is 8/10 on highways due to air suspension. On chip seal, speed humps, potholed roads ride comfort is 5/10 - there is very abrupt jarring transmitted to cabin due to tyre profile and rims. Wet grip in cold (5&#39;C) and damp country highways was 7/10 at 110km/h speeds - there was some slip noticeable. Dry grip was 8/10 most of the time but with occasional rear traction slips at highway speeds in curves. This combination of tyres and rims is quite poor for a luxury sedan and compliant rides.
06.06.2020fromChris Farnell
These tyres are great. Low road noise, and surprisingly grippy in the wet. Like really grippy
12.06.2019fromTony Galloni
I have used Pirelli P Zeros for about 15 yrs and they are a great tyre
(15)

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just  310.22 £
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Details
Pirelli P Zero E RunForward
Pirelli
Pirelli
P Zero E RunForward
255/40 R21 102Y XL, Elect, run-flat

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance AWet grip ANoise emissions 70dB
just  323.03 £
limited stock
Details
Nokian Hakka Black 3
Nokian
Nokian
Hakka Black 3
255/40 R21 102W XL, SUV

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 70dB
just  324.71 £
available
Details
Bridgestone Alenza 001
Bridgestone
Bridgestone
Alenza 001
255/40 R21 102Y XL B-Silent R0, EVc

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 70dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(29)
Average based on 29 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven7075710
01.11.2020fromStewart Blake LEISHMAN
This is the second set of the same tyres, and yes they hold the road well. When you have 20 something inch of rubber on the road they can really hold there own. The Which magazine holds Bridgestone to high esteem.
13.10.2020fromBowber
Great tyres, good grip especially in wet, feel safe! Noise isn&rsquo;t too crazy, hopefully get some decent mileage out of them
11.07.2020fromPat
Much better in the wet than Dunlop tyres that were on the car.
24.03.2020fromSmiffy
OEM tyre for car. Provide amazing grip in a 4 wheel drive lightweight sports car. Cornering at speed is amazing, braking too.
(29)

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just  326.38 £
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Details
Pirelli P Zero PZ4 SC
Pirelli
Pirelli
P Zero PZ4 SC
255/40 R21 102W XL MGT2, Elect

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 71dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(15)
Average based on 15 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven2702975
18.09.2022fromDAVID
These are as close to perfect summer tyres that I have come across in more than 50+ years of spirited driving. Wet grip is of great importance, and these tyres are actually AO, which I always purchase, as I understand that grip was paramount in AUDIs requirements. The car is a modified 25th Anniversary model and is fitted with SACHS Race Engineering Coil-Over suspension. The cylinder head has been ported and polished with the motor now producing well over 200 ps.
14.06.2021fromy2kdisease
Car had 20&quot; 245/35r20 runflats in front and 275/30r20 runflats (all MOE) for RWD w213 luxury saloon. The car came with these factory fitted MOE runflat tyres. I&#39;ve Replaced these tyres and wheels at 10600km. I&#39;ve driven 8600km of that mileage. The tyres wore like rubber bands on the 20&quot; wheels. Steering as a result is very precise in both wet and dry. Front 245/30s have sound deadening foam and overall tyre noise is quiet in the cabin (but just wee bit louder than the 18&quot; PS4 tyres I replaced them with). Ride comfort is 8/10 on highways due to air suspension. On chip seal, speed humps, potholed roads ride comfort is 5/10 - there is very abrupt jarring transmitted to cabin due to tyre profile and rims. Wet grip in cold (5&#39;C) and damp country highways was 7/10 at 110km/h speeds - there was some slip noticeable. Dry grip was 8/10 most of the time but with occasional rear traction slips at highway speeds in curves. This combination of tyres and rims is quite poor for a luxury sedan and compliant rides.
06.06.2020fromChris Farnell
These tyres are great. Low road noise, and surprisingly grippy in the wet. Like really grippy
12.06.2019fromTony Galloni
I have used Pirelli P Zeros for about 15 yrs and they are a great tyre
(15)

Reifentest.com

just  328.95 £
limited stock
Details
Michelin Pilot Sport 4 SUV
Michelin
Michelin
Pilot Sport 4 SUV
255/40 R21 102Y XL Acoustic AO1, EV Suitable

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 70dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(1)
Average based on 1 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow  N/A
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven373000
15.09.2024fromTimbo
Vast improvement in all areas compared to the Dunlops that came off. Particularly comfort and noise are extremely good! Fuel consumption is better, and they&#39;re a good looking tyre also! :-)
(1)

Reifentest.com

just  340.65 £
available
Details
Pirelli Scorpion Zero All Season
Pirelli
Pirelli
Scorpion Zero All Season
255/40 R21 102W XL MGT1, Elect

Tyre type

 All-season tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip BNoise emissions 71dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(5)
Average based on 5 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven356148
26.06.2026fromRichard
Very happy with the tyres, no complaints
17.04.2024fromDave Wightman
The new tyres improved the grip both in wet and dry conditions, which was noticeable immediately. There was also some marginal improvement in fuel consumption. There was no test on snow.
(5)

Reifentest.com

just  347.35 £
limited stock
Details
Pirelli Scorpion Winter
Pirelli
Pirelli
Scorpion Winter
255/40 R21 102V XL MGT

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 73dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(13)
Average based on 13 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven1936071
13.06.2024fromJon Stroud
Having used Pirelli Scorpions as a winter tyre before, I&#39;ve always been extremely happy with their performance. For a soft compound tyre the wear rate on them is surprisingly good - I usually get a good 3+ winters on them swapping them in in December and out again round about March. They get a lot of driving on pretty poor country roads as well as longer motorway runs and, when the weather gets bad, inspire a great deal of confidence. Grip on the snow is exceptional. They are a little noisier than the Pirelli P-Zeros that I run the rest of the year but that&#39;s to be expected - generally you only notice that when switching back to the summer tyres!
23.07.2023fromChris
Faultless. Noise levels great for a winter tyre
29.05.2022fromNigel
Rock solid grip when accelerating, braking, and cornering. Superb in cold conditions.
(13)

Reifentest.com

just  354.30 £
limited stock
Details
Bridgestone Blizzak LM 005
Bridgestone
Bridgestone
Blizzak LM 005
255/40 R21 102V XL, EVc

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. <span><em>Tyretest.com</em></span> offers over 430 000 tests firsthand - from consumers for consumers.

(14)
Average based on 14 test results  N/A
Grip in dry conditions
Braking in dry conditions
Grip in wet conditions
Braking in wet conditions
Grip in snow
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven4069330
24.06.2024fromDes
Great tyres , good all round grip, as I live in Scotland the seasons change every 5mins, with plenty of rain &amp; the odd bit of snow , I do some off road driving and never got the car stuck, I do run this type of tyre all year round , but as the car is quite light I always change my tyres when they get down to 3mm , I think this is far safer ,
01.04.2024fromRobert
The tyres perform unbelievably well. Braking and grip in the wet is just phenomenal. Outstanding performance. Superb and consistent grip in heavy persistent rain along French motorway to the UK, long and short journeys.
16.05.2023fromRacer 1974
I went for the BMW approved (star marked) Blizzak and I&rsquo;m very happy with the tyres. I&rsquo;ve had Conti Winter Contact on previous cars and in regular use I would say the Blizzak is very comparable. The car retains decent steering feel and traction on wet and dry roads plus offers a far greater level of grip on snow/slush over a regular tyre. Ride comfort seems pretty much unchanged, as always with winters there is a little more noise but it&rsquo;s slight and after 5 minutes you don&rsquo;t notice! Fuel consumption does increase very slightly over the summer tyres BUT that could be down to the cold weather as much as the tyres!
11.05.2023fromSam Summers
I bought these so that I wouldn&#39;t have any mishaps during the winter in my beloved car. I was worried that it would be a nightmare to drive in the snow due to being rear wheel drive and its power. I put these tyres on the front and different winter tyres on the rear and never had any problems at all - very surprised and impressed!
(14)

Reifentest.com

just  360.38 £
available
Details
New
Hankook iON evo (IK01A)
Hankook
Hankook
iON evo (IK01A)
255/40 R21 102Y XL 4PR *, EV, SUV SBL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance AWet grip BNoise emissions 70dB
just  367.13 £
limited stock
Details
Hankook iON i*cept (IW01A)
Hankook
Hankook
iON i*cept (IW01A)
255/40 R21 102V XL SoundAbsorber, EV, SUV

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance DWet grip BNoise emissions 70dB
just  389.31 £
limited stock
Details
Nokian Hakkapeliitta R5 EV
Nokian
Nokian
Hakkapeliitta R5 EV
255/40 R21 102T XL SilentDrive, EV Nordic Compound

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip DNoise emissions 71dB
just  449.06 £
limited stock
Details
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