SPORTEC M7RR [120/70ZR17M/CTL (58W)] Tire

What is SPORTEC M7 RR?
SPORTEC" is the name for Super sports tires in Metzler's product range..
M7 is the latest Tire in the SPORTEC series, which has evolved from the M1, M3 and M5..
RR" stands for Road Racing (Public Road Race), which means that this Tire has been developed through a public road race..
In other words, the "SPORTEC M7 RR" is the latest Super sports tire developed with feedback from the world's top road races such as the historic Isle of Man TTR race..

Metzler's development philosophy
Asphalt on the road surface is not Smooth on so-called public roads, like Circuit. Or it may be even rougher than we thought.. Sometimes there are large undulations, repair marks, dust stains, fallen leaves, puddles, white lines, etc... There are many unexpected events.. Tire must be able to perform reliably in all these situations..
Metzler believes that the Tire's ability to deal with these unexpected situations is what the rider needs in order to enjoy riding safely and with complete confidence..
Therefore, Metzler has been developing Tires that can be used not only on Closed TestCourses but also on public roads where road surface conditions are rapidly changing..

Development of the "SPORTEC M7 RR" - Participation in the Metzeler Public Road Race
In March 2013, at the "Ace Cafe London" in the U.K., Metzler launched a PRO project to develop Super sports tires by supplying tires to top riders aiming to win the Isle of Man TT and North West 200, etc., through their race activities. announcement. I've won a number of races since the beginning of the season..
The "SPORTEC M7 RR" was developed by fully utilizing the feedbacks of the PRO project..
Also in 2014, he competed in the Isle of Man TT Race, North West 200, and Pikes Peak.. He has supported riders such as Guy Martin, James Hiller, James Coatton, Dean Harrison, GARY Johnson and A Raster Shealy to eight wins and 17 podiums.. In the future, I'll be competing in the Macau Grand Prix, the Ulster Grand Prix and Southern 100, and I'll also be competing in the Southern 100 with a spongy Third

The SPORTEC M7 RR at RACETRACK
In addition, Metzler supports "The ADAC Junior Cup", a race for young riders in Germany..
The "SPORTEC M7 RR" middle size has been selected as the Official Tire for this one-make race for the KTM RC390. SPORTEC M7 RR", which was developed based on the feedback from public road racing, is now helping to foster young drivers in Circuit..

To the active riders...
The "SPORTEC M7 RR" has been developed for all riders who actively enjoy riding..
Active riders want to have fun riding in all kinds of situations, from daily commuting, to weekend winding, to long distance touring.. To do so, you'll need a tire that will allow you to ride safely in a variety of surface, weather and temperature conditions..
Active Rider is...
The rider who asks for high level performance from the Tire in order to run through Winding sporty.
Rider to enjoy riding in various situations with small luggage and sometimes a partner on the back for a short weekend trip.
A rider who enjoys long distance travel and always needs a bank angle in Winding.
It is for these riders that Metzler applied the latest technology and the knowledge gained from the toughest road races to develop the SPORTEC M7 RR..
The "SPORTEC M7 RR" has a high level of safety in terms of "light handling" and "high dry grip", which are essential for sports riding, as well as a high level of "Wet Performance" and "safety", which are in a different dimension for a super sports tire and easy to grasp the road surface conditions. This is the new standard for Super sports tires..

Technical Explanation
The SPORTEC M7 RR features an all-new Concept profile fed back from the rigors of road racing, internal construction, distinctive Groove Design for RainTire-like drainage and the latest Compound..
Technical Features of the SPORTEC M7 RR
1. New Profile with Large O.D.:Excellent handling and road-holding
2. Optimized internals:Safety, excellent stability during deceleration and cornering, and good understanding of road conditions
3. Metzler's exclusive GrooveDesign:superior WetPerformance for reliable banking even in the rain
4. Latest Compound:Very high Dry grip and WetPerformance

1. Adoption of the new Profile with a large outer diameter
Handling characteristics are determined by what kind of profile (Tire shape) is adopted.
The SPORTEC M7 RR provides quick banking from the upright position and a high degree of freedom in handling when changing lines.. For this purpose, a new profile with a large outer diameter (Figure 1) has been adopted..
Fast-changing road conditions on public roads. Top riders have requested this Profile to control the Machine quickly and reliably in extreme conditions..
The Shoulder portion is in contact with the flat surface in the corner ring and has a 5% larger ground contact area than the SPORTEC M5 INTERACT (hereafter M5).. Better Grip.
Also, the height of the side wall is increased by 3mm (compared to M5) to increase the road-holding capacity, and this allows for quicker escape from the corner by transmitting large traction to the road when Axel is opened..

2. Internal Structure Optimization
The inner structure of the carcass is made of Rayon, which has high wire density and high tensile strength, to suppress the deformation of the Tire due to centrifugal force (Figure 2)..
This allows the Tire to maintain its optimal shape and stability at high speeds and during braking and corner ringing..
In addition, by using this high tensile strength Rayon, we were able to reduce the number of Rayon strikes by 20% while maintaining tire rigidity..
This makes it possible to accurately communicate various road surface conditions (information) to the Rider and to precisely control the Machine as intended in all situations..
0 degree Steel beltRadial structure is applied to the belt part. 0 degree Steel belt tension change "INTERACT Technology" is applied to control the pressure applied to the road surface.. The optimum contact surface shape is maintained at all banked angles, allowing for a high degree of freedom of handling with maximum grip..
INTERACT Technology is the latest addition to the 0° Steel belt Radial technology and is the core technology behind the development of the MetzlerTire, the world's first steel belt application..

3. Metzler's proprietary GrooveDesign
The GrooveDesign is designed to provide a high margin of safety when encountering wet or dirty surfaces while enjoying sports riding as well as grip on dry or wet roads, with drainage comparable to RainTire and stability when cornering. (Figure 3)..
＜Longitudinal Groove -CompoundBridge-
A part called the "CompoundBridge" is installed in the longitudinal groove that circles the rear tire to suppress the deformation of the tread surface..
This ensures that traction is transmitted to the road surface when Axel is opened, and at the same time, reduces the deterioration of performance during wear to the smallest possible extent.. Also, by keeping the shape of the Groove, drainage is improved on wet roads..
＜Lateral Groove.
Lateral Groove becomes shallower towards the Shoulder portion of the tire, which stabilizes the tread surface and provides high road-following capability at deep bank angles..
Also, by widening the groove toward the Shoulder and improving drainage at deep bank angles, the SPORTEC M7 RR can enjoy sports riding on wet roads..

＜Revise the Sea-Land ratio.
The Front tire is responsible for wading through water on the road surface.. The sea-land ratio has been increased from 12.6% to 14.7% compared to M5, thereby improving its wet performance (Figure 4)..
Rear tire Sea-Land ratio decreased from 12.6% to 11.1%.. In the Shoulder section, the Groove is reduced and the Grip in the corner ring is maximized in the Dry condition..
In addition, many grooves are placed on the tread surface from the upright state (Figure 5, lean angle 0 degrees) to the initial stage of the bank (Figure 5, lean angle around 15 degrees) to maximize drainage capacity.. This allows the rider to know exactly what's happening on the road in wet conditions and to bank the car as the rider intends..

4. The Latest Compound
Our concept for the development of the "Sportec M7 RR" was to develop a tire that can safely enjoy sports riding in conditions ranging from mid-summer with high road surface temperatures to mid-winter with low temperatures, puddles and fallen leaves..
Metzler's unique compound mixing technology, DSM (Different Stage Mixing), disperses the molecules in the compound to the largest possible size, creating a compound with an unprecedented level of uniformity..
The latest silica compound developed with this technology provides stable performance in high road surface temperatures, which the conventional silica compound has been weak at, and at the same time, provides grip and quick warm-up even at low temperatures..
As a result, we were able to use Compound, which contains 100% Silica, in our super sports tires, the SPORTEC M7 RR..
＜Front tire.
Latest 100% Silica compound (Figure 6). The silica compound has a weakness for high road surface temperatures, but it continues to show stable performance even at high temperatures..
＜Rear tire.
The Silica content of the compound is changed between the Center and Shoulder portions (Figure 7)..
The Shoulder section is made of the latest 100% Silica Compound, which not only provides excellent grip and quick warm-up in wet conditions, but also keeps the performance stable even in high road temperature conditions..
In addition, the bottom and center of the shoulder portion of the compound (approximately 45mm wide, depending on the size) are made of a harder 70% Silica-compound. Tread surface deformation is suppressed to achieve excellent mileage and stable corner ring..

Summary
Metzler has developed the SPORTEC M7 RR for riders who enjoy active riding in a variety of situations..
The latest technology and the know-how gained from racing on the toughest roads have been applied to this tyre to provide the "light handling" and "high dry grip" that are essential for sports riding. By combining "Wet Performance" and "Safety" at a high level, the "SPORTEC M7 RR" sets a new standard in super sports tires..
1. New Profile with Large O.D.:Excellent handling and road-holding
2. Optimized internals:Safety, excellent stability during deceleration and cornering, and good understanding of road conditions
3. Metzler's exclusive GrooveDesign:superior WetPerformance for reliable banking even in the rain
4. Latest Compound:Very high Dry grip and WetPerformance