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The efficiency class label evaluated based on customer preferences.
Delticom centralized survey results from more than 40.000 customers from 15 European countries and created this index.
Dynamically designed passenger and SUV tyre for maximum grip and ultra high performance. Leading edge tread design coupled with an advanced silica compound for optimum performance and a responsive drive.
Tried and tested performance
The DX640 has outstanding wet grip ratings and low noise scores, regularly beating other performance brands in tyre tests. Optimal water dissipation is achieved through four longitudinal grooves and these are contained within substantial tread blocks for superior noise reduction.
Features and Benefits
The outer block pattern consists of two key elements, the solid rectangular inner blocks provide maximum grip when cornering, whilst the outer tapered deep sipe section provides drainage even as tread decreases throughout the useful life of the tyre.
The three main inner block sections consist of a 3D shaped pattern resulting in adaptable performance that is optimised as tread depth decreases throughout the life of the tyre.
The inner block sections dynamic design has the dual purpose of drainage and noise reduction with the added benefit of a wider circumferencial groove containing reservoirs to provide inner grip throughout corners.
The Tire Labeling Ordinance specifies the information requirements on fuel efficiency, wet grip and external rolling noise from tires. In addition, reference is made to the winter properties of the product.
The EU 1222/2009 regulation that has been in force since November 1st, 2012 has been revised and will be replaced by regulation EU 2020/740 from May 1st, 2021; From this point on, new requirements apply. The rating classes for fuel efficiency, wet grip and exterior noise have been changed and the layout of the EU label has been adjusted. The manufacturer's product data sheets stored in the EU database can be downloaded via a QR code integrated into the label. Information on snow grip and ice grip is also newly included for tires that meet these criteria.
The following tires are exempt from the regulation: - tires that are designed exclusively for installation on vehicles that were first registered before October 1, 1990 - retreaded tires (until a corresponding extension of EU VO 2020/740 has taken place) - professional off - Road tires - Racing tires - Tires with additional devices to improve traction, eg studded tires - T-type emergency tires - Tires with a permissible speed below 80 km/h - Tires for rims with a nominal diameter ≤ 254 mm or ≥ 635 mm
The criteria and evaluation classes at a glance
fuel efficiency
The fuel consumption depends on the rolling resistance of the tyres, the vehicle itself, the driving conditions and the driving style of the driver. The measured rolling resistance (rolling resistance coefficient) of the tire is divided into classes A (highest efficiency) to E (lowest efficiency).
If a vehicle is completely equipped with class A tires, a consumption reduction of up to 7.5%* is possible compared to class E tyres. In the case of commercial vehicles, it can even be higher. (Source: European Commission Impact Assessment * when measured according to the test methods set out in Regulation (EU) 2020/740)
Please note: Fuel consumption depends to a large extent on your own driving style and can be significantly reduced by driving in an environmentally friendly manner. Tire pressure should be checked regularly to improve fuel efficiency.
wet grip
Wet grip is divided into classes A (shortest braking distance) - E (longest braking distance).
If a car is equipped with class A tires, compared to class E tires, a braking distance of up to 18 m can be reduced when braking from 80 km/h (on a road surface with average grip).* *Source: wdk Economic Association of the German Rubber Industry eV
Please note: Traffic safety depends to a large extent on your own driving style. The stopping distances must always be observed. Tire pressure should be checked regularly to improve wet grip.
External rolling noise
The noise emitted by a tire affects the overall volume of the vehicle and affects not only your own driving comfort, but also the noise pollution of the environment. In the EU tire label, the external rolling noise is divided into 3 classes from A (lowest rolling noise) - C (highest rolling noise), measured in decibels (dB) and compared with the European noise emission limit values for external tire rolling noise.
A The pictogram with the classification "A" indicates that the tire's external rolling noise is more than 3 dB below the EU limit value in force until 2016. B The "B" classification means that the tyre's external rolling noise is up to 3 dB below or equal to the EU limit value in force until 2016. C The classification "C" indicates that the specified limit value is exceeded.
DX640 tyre review
Average based on 21 test results
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 driven9,895
03.06.2025fromIan Cornish Medical problems have severely restricted driving over last 12 months, but I am satisfied with the tyres in town and across country. and the cost.
15.06.2024fromBrandon I'm quite an aggressive driver for want of a better phrase (I don't hang around) and have driven many cars on many different tyres including Bridgestone, toyo, advan, Goodyear, the list goes on. However, these davanti dx640 tyres are on another level, I live in the countryside in rural Norfolk UK, road conditions aren't the greatest even on dual carriageways but these tyres make driving a breeze. Traction under hard acceleration is extremely good, they hook up well and will barely spin up the wheels (my bmw 325i e92 is 225hp and spins most tyres you put on it) the same goes for hard acceleration in the wet, giving the driver a lot of confidence in the vehicle (especially rwd vehicles). Traction under hard cornering in the wet is probably the best I've had from any tyre I've ever used, very precise and the feed back is unreal, you can put the car exactly where you want it on the road and it seems this is possible even when you think it shouldn't be (wet slippery roundabouts are not a problem for this tyre even at speed). With that said, you can probably imagine the cornering capabilites of this tyre when being used in dry situations. Infact, it's hard to feel any real difference in its abilities between wet performance and dry performance. The fact I've also done 5000 miles (not km) barely using any tread is great and I have no idea how they can make a tyre that handles as well as this, gives feedback as well as this, even in the wet, yet doesn't burn through rubber? It's crazy!
These tyres may also be the quietest tyres I've used, again surprising as usually for the performance of a tyre like this you get a fair amount of road noise. I'd go as far to say these davanti tyres act like a semi slick in the dry, act like a wet racing tyre in the wet giving massive amounts of confidence to the driver, yet sound and have the longevity of a premium brand tyre that would cost you more than double the price.
18.09.2023fromThomas kirk These tyres would appear to be made from cheese and not cheddar, the soft kind like Feta. The merest hint of a curb and large chunks fall off the side wall. I will have to replace the two front tyres after 6 months and 700 miles to get the car through MOT. The previous tyres were on the car 8 years so it’s not the drive, my wife who’s not a brilliant driver to be honest, but the previous tyres stuck around for 8 years so I’m pretty sure I won’t be buying Devanti tyres any time soon. Appalling bad tyres.
19.05.2019fromChris I judge these tyres as I find and not by what I paid as these were cheap cheap cheap and by no means does the tyre represent the cost however these are my rear tyre on rear wheel drive car and often on wet roads I find the back slipping under heavy acceleration did not get this with my vredestein tyres but they were 100 cheaper for the pair agreed if I wasn't so heavy footed I would be fine I certainly wouldn't and didn't fit to the front on replacement as I spent more on stayed with my usual vredestein tyres overall a decent tyre for everyday use but not if you like to punch the throttle..
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