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Hankook DynaPro HP RA 23 Summer Tire for Off-Road Vehicles
Hankook DynaPro HP RA 23 is a comfortable summer tire for powerful all-wheel-drive vehicles like new models of SUVs and off-roaders. It ensures safe driving at a speed up to 130 mph.
The tire’s compound is molded into universal non directional tread picture created with the help of computer simulation techniques, which made it possible to maximize the efficiency of all its elements and to achieve balanced performance in various situations.
[brandspecials]Hankook DynaPro HP RA 23[/brandspecials]
The central tread features a segmented central rib for better steering response on both wet and dry asphalt roads. Stiff shoulder blocks ensure great course-keeping ability on a highway and improve traction off the road. The shape of blocks and their arrangement help reduce sound fluctuations and thus minimize noise level.
The peculiar groove configuration prevents from hydroplaning for the grooves effectively remove water from under contact patch area. Furthermore, the tire’s compound includes special elements that enhance wet traction, improve handling on wet surfaces and help reduce braking distance thus ensuring safety when driving at a high speed in bad weather.
Hankook DynaPro HP RA 23 features the reinforced casing that can endure stresses without any sign of deformation. The flexible steel belt adds to the tread durability and prolongs the tire’s life span. The tire’s construction also provides for even load distribution over the contact patch area, which reduces tread wear and ensures comfortable ride.
The tire’s performance was tested by several Europe papers – the English “Auto Express”, the German Autobild Allrad” and the French “L’argus.” The experts stated its precise steering in the wet, excellent hydroplaning resistance, short braking distance and low level noise it generates.
RunFlat Technology
Struggle for cabin space, more complicated suspension designs as well as unwillingness to burden a driver with fuss on wheel changing led to the creation of puncture-resistant tires. The technology was called RunFlat.
Different tire manufacturers use different symbols to mark RunFlat technology (for example: Goodyear RunOnFlat, Bridgestone RFT, Michelin ZP, Continental SSR).
The essence of the RunFlat technology lies in reinforced sidewalls that allow to hold the weight of a vehicle even in the case of a complete pressure loss. As a rule, such tires allow to preserve temporal mobility for a distance not more than 60 – 90 miles with a speed not more than 50 – 60mph. You don’t have to think about spare wheel – just drive to the nearest tire service centre.
But there are some problems that are connected with the operation of such tires. Problem number one – are you sure that you will be able to find a tire service center when driving somewhere in the middle of the forest/desert. The chances are minimal.
Besides this, RunFlat technology is based on the sidewall reinforcement thus requiring application of a special tire changing equipment that is not available in all tire service centers.
Another problem of RunFlat tires is that in most cases you will be able to know about the puncture only by accident as the performance of such tires before and after the puncture is practically the same. That’s why it is extremely necessary that your car is equipped with Tire Pressure Monitoring System. Otherwise such tires will not improve safety level – they will worsen it. For this reason You shouldn’t apply RunFlat tires on the vehicles the original equipment of which doesn’t provide for the use of such tires.
From The History Of Dunlop Tires.
Merits of the Dunlop company in the sphere of development and perfection of the pneumatic tire are great and unquestionable.
Dunlop was the first to use rubber and steel studs on the tread.
The engineers of Dunlop were the first to divide the tread of the tire into several rows thus increasing its treadwear resistance level while maintaining excellent traction performance.
Dunlop was also the first in the world to create a tire with lateral lugs.
As You know, the tube that was patented by J.B. Dunlop was actually borrowed from the squash ball and couldn’t be changed. Ch. Woods, the employee of the Dunlop company, was the first to invent the tube that exclusively suited pneumatic tire.
Ironically, Dunlop engineers were also the first to realize the idea of tubeless tire. The Dunlop employees were the first to invent water-resistant rubber compound what enabled to create winter tires (Graspic, SJ4 etc) the performance of which made the use of anti-skidding studs unnecessary.
Another very important fact is that the Dunlop company was the first to become aware of the necessity to develop tire science. The powerful scientific base that was established in the 20-ies of the XX century allows the company to remain one of the world leaders even today. The Dunlop team considered the tire not as it was (what was typical of other companies’ engineers) but as an integral component of a car. Such approach resulted in the creation of the first in the world laboratory for the tire testing. Even today many tire standards are based on the achievements that were first used by the Dunlop company (invention of hydroplaning effect in 1960, introduction of spare wheel with reduced diameter in 1983).
Facts About All-Season Tires
The most common mistake of many drivers is the use of so-called “all-season” tires all year round. It seems reasonable… You don’t have to change tires with the advent of bitter frosts or thaw. But it is delusion. M+S abbreviation (Mud & Snow) doesn’t mean that the tire can be operated both in severe frosts and during the hot summer.
Actually there is no “all-year” tire at all! All-season tires are made from rubber intended for dry asphalt but at the same time the rubber performs well in the conditions when the average temperature is around zero and the roads are covered with light snow and big amount of mud. The main thing to understand here is the difference between rubber compounds used for the production of summer and winter tires.
Winter tires are made from special rubber compound that is resistant to temperatures below zero and doesn’t lose elasticity even in severe frost thus ensuring better traction. All-season tire loses elasticity already at -41 F thus failing to provide necessary traction performance. Like winter tires M+S tires ensure elasticity only in dry warm weather. Besides this they don’t have sipes that create biting edges for better traction on ice- and snow-covered surface. The optimal conditions for all-season tires are slushy spring and fall when the roads are extremely muddy. All-season tire is also perfect for warm weather.
Another common mistake is the use of winter tires in the summer. Experienced drivers know that the operation of winter tires on warm asphalt leads to quick wear of the tread what makes the tire totally unsuitable for operation in the next winter.
The worst thing one can do is to use stud tires in the summer. You will definitely lose all studs within a couple of days and have terrible noise in the car. Besides this stud tires damage asphalted surface!