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  4. 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:
 
/
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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Momo Toprun M-30 Europa
Momo
Toprun M-30 Europa
275/45 R21 110Y XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip CNoise emissions 73dB
just  168.03 £
In Stock
Details
Free shipping**
Maxxis Victra Sport 6 SUV
Maxxis
Maxxis
Victra Sport 6 SUV
275/45 R21 110Y XL with rim protection ridge (FSL)

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance BWet grip ANoise emissions 72dB
just  173.90 £
In Stock
Details
Free shipping**
Maxxis Victra Sport 5
Maxxis
Maxxis
Victra Sport 5
275/45 ZR21 110Y XL SUV, with rim protection ridge (FSL)

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
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  174.53 £
limited stock
Details
Free shipping**
Leao Winter Defender Ice-I15
Leao
Leao
Winter Defender Ice-I15
275/45 R21 107T

Season

 Winter tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance DWet grip DNoise emissions 73dB
just  175.72 £
limited stock
Details
Free shipping**
Kleber Dynaxer HP 5 SUV
Kleber
Kleber
Dynaxer HP 5 SUV
275/45 R21 107V

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance BWet grip ANoise emissions 72dB
just  177.06 £
In Stock
Details
Free shipping**
General Grabber GT Plus
General
General
Grabber GT Plus
275/45 R21 110Y XL EVc, with kerbing rib

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip ANoise emissions 73dB
List price*  196.50 £
just  179.95 £
In Stock
Details
Free shipping**
Nankang Cross Sport SP-9
Nankang
Nankang
Cross Sport SP-9
275/45 ZR21 110Y XL, with rim protection (MFS)

Season

Highway Terrain Tyres

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
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.

(2)
Average based on 2 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 driven304795
01.01.2022fromD Lawrence
Tyres perform well
(2)

Reifentest.com

just  180.42 £
In Stock
Details
Free shipping**
Falken EUROALL SEASON AS220PRO
Falken
Falken
EUROALL SEASON AS220PRO
275/45 R21 110W XL, VCs, with rim protection (MFS) NBLK

Season

 All-season tyres
2 - 4 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 71dB
List price*  294.50 £
just  183.49 £
limited stock
Details
Free shipping**
Goodyear Eagle F1 Asymmetric 6
Goodyear
Goodyear
Eagle F1 Asymmetric 6
275/45 R21 110Y XL EVR, with rim protection (MFS)

Season

 Summer tyres
2 - 4 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance BWet 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.

(57)
Average based on 57 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 driven8343440
07.10.2023fromSimon Hall
Amazing tyres, grip is excellent, comfort and noise are excellent. the only thing i can fault is that the wear isn&#39;t anything special. Down to 4mm after 6000 miles. My tyre size is 245/35R18 but tyretest will not let me add the correct size above.
10.08.2023fromDanB
Excellent tyres chosen via the reviews by Jon @ tyrereviews.co.uk - they faired very well against the likes of the Michelin PS5s and at the time of buying (Feb2023) the Goodyears were &pound;250 cheaper than the PS5s; but more or less neck &amp; neck with them in the tyre review! That swung the decision for me, more so with the money saving!
23.09.2022fromJames g
Fuel consumption high
07.02.2022fromSpiros
Car Driven : BMW 425D 225Hp . Quite quietly from the start until the first 10,000 km they kept a relatively low noise level until the end of their lives. Relatively comfortable especially considering that is a runflat tire. The tire tread still retains its original groove and design but has significant wear points on both edge and there are some small tire detachments. In the few rains we have in Greece it never had a hadling problem or breaking and did not create any feeling of insecurity. in short it is a good quiet tire ROF tire, comfortable and efficient in fast driving.
(57)

Reifentest.com

just  186.29 £
limited stock
Details
Free shipping**
Davanti Terratoura A/T
Davanti
Terratoura A/T
275/45 R21 110V

Season

All Terrain Tyres

 All-season tyres
1 - 2 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip BNoise emissions 73dB
just  186.58 £
In Stock
Details
Free shipping**
Lassa Competus H/P 2
Lassa
Lassa
Competus H/P 2
275/45 R21 110Y XL

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 72dB
just  189.15 £
limited stock
Details
Free shipping**
Kumho WinterCraft WS71 SUV
Kumho
Kumho
WinterCraft WS71 SUV
275/45 R21 110V XL, with rim protection ridge (FSL)

Season

 Winter tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance DWet grip CNoise emissions 72dB
List price*  344.55 £
just  189.98 £
limited stock
Details
Free shipping**
Firestone Roadhawk 2
Firestone
Firestone
Roadhawk 2
275/45 R21 110Y XL Enliten / EV, with rim protection (MFS)

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
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

List price*  289.00 £
just  190.06 £
limited stock
Details
Free shipping**
Kumho WinterCraft WS71 SUV
Kumho
Kumho
WinterCraft WS71 SUV
275/45 R21 110V XL, with rim protection ridge (FSL)

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance DWet grip CNoise emissions 72dB
List price*  344.55 £
just  190.32 £
In Stock
Details
Free shipping**
Momo North Pole W-20
Momo
North Pole W-20
275/45 R21 110V XL

Season

 Winter tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
just  191.35 £
In Stock
Details
Free shipping**
BF Goodrich Advantage 2
BF Goodrich
BF Goodrich
Advantage 2
275/45 R21 110W XL SUV, with rim protection ridge (FSL)

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance BWet grip ANoise emissions 73dB
just  191.42 £
In Stock
Details
Free shipping**
Falken AZENIS FK520
Falken
Falken
AZENIS FK520
275/45 R21 110Y XL VCs, with rim protection (MFS) NBLK

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip ANoise emissions 71dB
List price*  298.00 £
just  191.70 £
In Stock
Details
Free shipping**
Hankook Ventus evo K137A
Hankook
Hankook
Ventus evo K137A
275/45 ZR21 110Y XL 4PR SUV, with rim protection (MFS) SBL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip ANoise emissions 71dB
List price*  296.50 £
just  193.04 £
In Stock
Details
Free shipping**
Nankang Cross Sport SP-9
Nankang
Nankang
Cross Sport SP-9
275/45 ZR21 110Y XL, with rim protection (MFS)

Season

Highway Terrain Tyres

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance EWet 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.

(2)
Average based on 2 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 driven304795
01.01.2022fromD Lawrence
Tyres perform well
(2)

Reifentest.com

just  193.77 £
In Stock
Details
Free shipping**
BF Goodrich Advantage 2
BF Goodrich
BF Goodrich
Advantage 2
275/45 R21 107V SUV

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance BWet grip ANoise emissions 72dB
just  195.86 £
limited stock
Details
Free shipping**
Continental CrossContact LX Sport
Continental
Continental
CrossContact LX Sport
275/45 R21 107H EVc, MO

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip CNoise emissions 72dB
List price*  372.00 £
just  197.04 £
limited stock
Details
Free shipping**
Kleber Dynaxer HP 5 SUV
Kleber
Kleber
Dynaxer HP 5 SUV
275/45 R21 110W XL

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance BWet grip ANoise emissions 73dB
just  199.32 £
In Stock
Details
Free shipping**
Yokohama Geolandar X-CV (G057)
Yokohama
Yokohama
Geolandar X-CV (G057)
275/45 R21 110W XL, RPB

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance DWet grip BNoise emissions 72dB
List price*  345.00 £
just  200.59 £
limited stock
Details
Free shipping**
Roadcruza RA1100
Roadcruza
RA1100
275/45 R21 113/110S

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip ENoise emissions 75dB
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 driven419848
21.05.2024fromScott
Worse tyre ive had in the wet, very dangerous round round abouts and after 40,000km there nearly worn out
(1)

Reifentest.com

just  200.87 £
In Stock
Details
Free shipping**
Comforser CF1100
Comforser
CF1100
LT275/45 R21 113/110S 10PR RWL

Season

All Terrain Tyres

 All-season tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance CWet grip ENoise emissions 75dB
just  201.34 £
In Stock
Details
Free shipping**
Nokian Powerproof 2
Nokian
Nokian
Powerproof 2
275/45 R21 110Y XL Aramid Sidewalls, with rim protection (MFS)

Season

 Summer tyres
2 - 5 working days delivery time
In Stock
Tyre label
Tyre label
Roll resistance BWet grip ANoise emissions 70dB
List price*  304.50 £
just  203.39 £
In Stock
Details
Free shipping**
Vredestein Quatrac Pro+
Vredestein
Vredestein
Quatrac Pro+
275/45 R21 110Y XL EVc, with rim protection ridge (FSL)

Season

 All-season tyres
1 - 2 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip BNoise emissions 73dB
List price*  329.00 £
just  205.05 £
limited stock
Details
Free shipping**
GT Radial SportActive 2
GT Radial
GT Radial
SportActive 2
275/45 R21 110Y XL EV Ready, SUV, with rim protection (MFS)

Season

 Summer tyres
2 - 5 working days delivery time
limited stock
Tyre label
Tyre label
Roll resistance CWet grip ANoise emissions 69dB
just  205.49 £
limited stock
Details
Free shipping**
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