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Home  >  225 / 40 18  >  Diamondback Tyres  >  Diamondback 225 / 40 18
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  Diamondback    225/40  18     

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Nexen Winguard Ice Plus
Nexen
Nexen
Winguard Ice Plus
225/40 R18 92T XL 4PR Nordic Compound

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip E Noise emissions 71 dB
just  203.39 £
limited stock
Details
Goodyear UltraGrip Ice 3
Goodyear
Goodyear
UltraGrip Ice 3
225/40 R18 92T XL Nordic Compound

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance B Wet grip E Noise emissions 70 dB
just  206.80 £
limited stock
Details
Falken WINTERPEAK F-SNOW 1
Falken
Falken
WINTERPEAK F-SNOW 1
225/40 R18 92T XL Nordic Compound

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip D Noise emissions 71 dB
just  221.60 £
available
Details
Goodyear Ultra Grip Arctic 2
Goodyear
Goodyear
Ultra Grip Arctic 2
225/40 R18 92T XL, EVR studded

Tyre type

 Winter tyres
limited stock
just  227.19 £
limited stock
Details
Michelin X-Ice Snow
Michelin
Michelin
X-Ice Snow
225/40 R18 92H XL, EV Suitable Nordic Compound

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance C Wet grip E Noise emissions 69 dB
just  230.12 £
limited stock
Details
Falken WINTERPEAK F-ICE 1
Falken
Falken
WINTERPEAK F-ICE 1
225/40 R18 92T XL studded

Tyre type

 Winter tyres
available
just  234.01 £
available
Details
Barum Polaris North 6
Barum
Barum
Polaris North 6
225/40 R18 92T XL, EVc Nordic Compound

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip D Noise emissions 72 dB
just  235.44 £
available
Details
Continental VikingContact 8
Continental
Continental
VikingContact 8
225/40 R18 92T XL, EVc Nordic Compound

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance B Wet grip D Noise emissions 69 dB
just  260.48 £
available
Details
Michelin X-Ice North 4
Michelin
Michelin
X-Ice North 4
225/40 R18 92T XL, EV Suitable studded

Tyre type

 Winter tyres
available
just  261.69 £
available
Details
Nokian Hakkapeliitta R5
Nokian
Nokian
Hakkapeliitta R5
225/40 R18 92T XL Nordic Compound

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance C Wet grip D Noise emissions 71 dB
just  268.86 £
available
Details
Yokohama Advan A052
Yokohama
Yokohama
Advan A052
225/40 R18 92Y XL

Tyre type

Supersport Road

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip A Noise emissions 71 dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com 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 driven 21000
16.12.2025 from Edward Nunn
these are on my track/fun car and replaced the 20 year old tyres on it which came with the car, they completely changed the performance of the car, for the better, they grip exceptionally, especially when set to optimum pressure for the conditions, and hold traction under very heavy braking. They are as described a dry weather tyre with the ability to just about cope in the wet, and my experience is of dry track days with a very wet drive cross country the day before a track day which was ok, although i could feel a massive loss in traction crossing white lines on the motorway, and the morning before a track day driving through wet cool lanes which required a huge amount of care and attention not to end up in a hedge.
(1)

Reifentest.com

just  273.60 £
limited stock
Details
Continental IceContact 8
Continental
Continental
IceContact 8
225/40 R18 92T XL, EVc studded

Tyre type

 Winter tyres
limited stock
just  296.68 £
limited stock
Details
Continental IceContact 3
Continental
Continental
IceContact 3
225/40 R18 92T XL studded

Tyre type

 Winter tyres
limited stock
just  300.74 £
limited stock
Details
Nokian Hakkapeliitta 01
Nokian
Nokian
Hakkapeliitta 01
225/40 R18 92T XL studded

Tyre type

 Winter tyres
available
just  327.11 £
available
Details
Nokian Hakkapeliitta 10
Nokian
Nokian
Hakkapeliitta 10
225/40 R18 92T XL studded

Tyre type

 Winter tyres
limited stock
just  354.25 £
limited stock
Details
Barum Polaris 5
Barum
Barum
Polaris 5
225/40 R18 92V XL, EVc

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip C Noise emissions 72 dB
just  440.81 £
limited stock
Details
Yokohama Advan A052
Yokohama
Yokohama
Advan A052
225/40 R18 92Y XL

Tyre type

Supersport Road

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance D Wet grip A Noise emissions 71 dB
Client reviews rating:
Client reviews rating

More than 5 billion kilometers. Tyretest.com 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 driven 21000
16.12.2025 from Edward Nunn
these are on my track/fun car and replaced the 20 year old tyres on it which came with the car, they completely changed the performance of the car, for the better, they grip exceptionally, especially when set to optimum pressure for the conditions, and hold traction under very heavy braking. They are as described a dry weather tyre with the ability to just about cope in the wet, and my experience is of dry track days with a very wet drive cross country the day before a track day which was ok, although i could feel a massive loss in traction crossing white lines on the motorway, and the morning before a track day driving through wet cool lanes which required a huge amount of care and attention not to end up in a hedge.
(1)

Reifentest.com

just  502.63 £
available
Details
There are 17 of 605 tyres displayed
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