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Home  >  275 / 45 21  >  Sonix  >  Sonix 275 / 45 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  Sonix   275/45  21     

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Nankang Winter Activa SV-3
Nankang
Nankang
Winter Activa SV-3
275/45 R21 110V XL, SUV

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 72dB
just  € 162.55
 
limited stock
Details
Gepormax Sport Max3
Gepormax
Sport Max3
275/45 ZR21 110W XL, EV

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 72dB
just  € 162.84
 
available
Details
Linglong Grip Master C/S
Linglong
Linglong
Grip Master C/S
275/45 R21 110W XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
just  € 163.96
 
available
Details
Westlake ZuperAce Z-007
Westlake
Westlake
ZuperAce Z-007
275/45 ZR21 110Y XL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
just  € 170.04
 
limited stock
Details
Gripmax SureGrip Pro Sport
Gripmax
SureGrip Pro Sport
275/45 R21 110Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
just  € 171.80
 
available
Details
Zeetex SU5000 Max
Zeetex
Zeetex
SU5000 Max
275/45 R21 110Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip BNoise emissions 71dB
just  € 171.91
 
available
Details
Grenlander Icehawke II
Grenlander
Icehawke II
275/45 R21 110H XL

Tyre type

 Winter tyres
available
just  € 172.09
 
available
Details
GT Radial SportActive 2
GT Radial
GT Radial
SportActive 2
275/45 R21 110Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 69dB
just  € 172.53
 
available
Details
Unigrip Lateral Force Sport
Unigrip
Unigrip
Lateral Force Sport
275/45 R21 110Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip BNoise emissions 73dB
just  € 174.77
 
available
Details
Dynamo Street-H Pursuit SUV
Dynamo
Street-H Pursuit SUV
275/45 R21 110W XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip ANoise emissions 71dB
just  € 176.62
 
available
Details
Minerva Frostrack UHP
Minerva
Minerva
Frostrack UHP
275/45 R21 110V XL

Tyre type

 Winter tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip CNoise 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.

(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
Driving comfort
Internal noise level
Tyre wear
Fuel consumption
Kilometers driven33000
(1)

Reifentest.com

just  € 178.30
 
available
Details
Dynamo MSU01
Dynamo
MSU01
275/45 R21 110Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 71dB
just  € 181.46
 
available
Details
Landsail RapidDragon SUV
Landsail
Landsail
RapidDragon SUV
275/45 R21 110Y XL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip BNoise emissions 72dB
just  € 181.63
 
limited stock
Details
Sentury Seasonsdragon 2
Sentury
Seasonsdragon 2
275/45 ZR21 110W XL

Tyre type

 All-season tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance BWet grip BNoise emissions 73dB
just  € 183.52
 
limited stock
Details
Firestone Roadhawk 2
Firestone
Firestone
Roadhawk 2
275/45 R21 110Y XL, Enliten / EV

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.

(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 driven250294
29.07.2025fromTom
These tyres in my rear wheel drive BMW are grippy in the dry, but leave me yearning for more in the wet. The car will &quot;step-out&quot; if I punch it whilst the road is even midly damp. My tracking was done at the same time as having these fitted so that is not a factor. The car will also step out if the road is more greasy looking.
(1)

Reifentest.com

just  € 186.10
 
limited stock
Details
Tracmax X Privilo RS-01 Plus
Tracmax
X Privilo RS-01 Plus
275/45 ZR21 110W XL

Tyre type

 Summer tyres
available
just  € 186.35
 
available
Details
Kumho Ecsta PS71 SUV
Kumho
Kumho
Ecsta PS71 SUV
275/45 ZR21 110Y XL

Tyre type

 Summer tyres
available
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
just  € 186.83
 
available
Details
Grenlander Icedefensor Stud II
Grenlander
Icedefensor Stud II
275/45 R21 110T XL studdable

Tyre type

 Winter tyres
limited stock
just  € 187.11
 
limited stock
Details
Starmaxx Incurro H/T ST450
Starmaxx
Starmaxx
Incurro H/T ST450
275/45 ZR21 110Y RF

Tyre type

H/T Reifen

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 71dB
just  € 189.17
 
limited stock
Details
Minerva Ecospeed 2 SUV
Minerva
Minerva
Ecospeed 2 SUV
275/45 R21 110Y XL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip CNoise emissions 72dB
just  € 189.68
 
limited stock
Details
Fronway Eurus 08
Fronway
Eurus 08
275/45 R21 110W XL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip BNoise emissions 72dB
just  € 190.03
 
limited stock
Details
Maxxis Victra Sport 5
Maxxis
Maxxis
Victra Sport 5
275/45 ZR21 110Y XL, SUV

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.

(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 driven269003
(1)

Reifentest.com

just  € 194.59
 
limited stock
Details
Maxtrek TREK M900 ICE
Maxtrek
Maxtrek
TREK M900 ICE
275/45 R21 110H XL studded

Tyre type

 Winter tyres
available
just  € 196.69
 
available
Details
Zmax WinterHawke II
Zmax
WinterHawke II
275/45 R21 110H XL

Tyre type

 Winter tyres
available
just  € 202.94
 
available
Details
LASSA Competus H/P 2
LASSA
Competus H/P 2
275/45 R21 110Y XL

Tyre type

 Summer tyres
limited stock
just  € 203.15
 
limited stock
Details
Sailun Ice Blazer Arctic
Sailun
Sailun
Ice Blazer Arctic
275/45 R21 110V XL

Tyre type

 Winter tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ENoise emissions 72dB
just  € 203.28
 
limited stock
Details
Kumho Ecsta PS71 SUV
Kumho
Kumho
Ecsta PS71 SUV
275/45 ZR21 110Y XL

Tyre type

 Summer tyres
limited stock
EU Tyre Label
EU Tyre Label
Roll resistance CWet grip ANoise emissions 73dB
just  € 205.93
 
limited stock
Details
Leao Winter Defender Ice-I15
Leao
Leao
Winter Defender Ice-I15
275/45 R21 107T

Tyre type

 Winter tyres
limited stock
just  € 207.37
 
limited stock
Details
There are 28 of 147 tyres displayed
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