Metzeler Introduces The Racetec RR and Racetec RR CompK Slick for the Track

Metzeler has announced the release of two new tires designed for the track – both for professional racers and for serious track day enthusiasts. They are the Racetec RR Slick (racing) and Racetec RR CompK Slick (for track days). They are both a step above the DOT approved Racetec tires Metzeler already releases as they are not legally allowed on public roads. That means grip and rideablity are as high as they can be.

Metzeler says the key characteristics of the Racetec RR CompK Slick, dedicated to use in the Superbike categories in the various national championships and in Road Racing events, are grip, handling and riding precision when pushing to the limit in situations typical of high level competitive events, versatile use in terms of high adaptability to different types of asphalt, temperatures and motorcycle, simplicity of use, long life and consistent performance.

The Racetec RR CompK Slick on the other hand, was designed specifically for those users who, although not professional riders, love riding on track days or are simply amateur or beginner riders who want to train by racking up the miles to find the best setup for their bikes without necessarily looking for absolute top of the line performance.

The front Racetec RR Slick was redesigned from scratch: in order to ensure well-balanced performance in combination with the new rear sizes and to achieve better grip, the front sizes have a new profile with a larger external diameter. The new profile is now narrower, improving agility and creating a larger contact area, which means that there is more rubber on the ground to increase grip.

For the front and rear sizes, the new profiles also required a new structure with particular focus on the balance between flexibility, which allows the contact surface to grip the asphalt copying its micro-bumps, and stiffness, which improves precision in braking and going into turns. The optimum balance was achieved on the front sizes using two plies of aramid combined with the 0° steel belt, whereas on the rear it was achieved using a sturdier carcass ply but made of rayon, a more flexible material than aramid, combined in this case as well with the 0° steel belt.

The track only slicks will be available in front tire sizes of  120/70 R 17  K1 and 120/70 R 17  K2, while the rears will be available as 180/60 R 17 K1, 180/60 R 17 K2, 200/60 R 17 K1, 200/60 R 17 K2.

Metzeler Introduces Two New Tires for the Track Metzeler Introduces Two New Tires for the Track Metzeler Introduces Two New Tires for the Track

Metzeler Introduces Two New Tires for the Track

Michelin to Launch Six New Race and Track Day Tires in 2015

Let’s be honest – tires are one of the least sexy things about a motorcycle. We’d all much rather talk about capacity, horsepower, torque – even how many pistons the front brake caliper has than really give a huge amount of thought into what rubber wraps around the wheels. But alongside your brakes, they quality of the tires you use is the main factor in not only how quickly you stop but how you grip the road in corners.

Michelin has announced that it will be revamping its performance motorcycle tire range starting in May this year with six new tires aimed at the track. The range goes from full racing slick to performance orientated tires you can use on the street as well. Michelin creates what we think is the best general riding tire – the Pilot Road series – so we don’t doubt that their track tires are among the best as well.

As per the press release, the tires (which will initially be available in the USA and Canada) are as follows:

  • MICHELIN Power SuperMoto
    Developed in collaboration with the best riders, this range turned in a winning performance at the 2014 FIM SuperMoto World Championship.It features a new 16-inch version and innovative rubber compounds that significantly and simultaneously improve feedback from the front tire, handling, grip and longevity.
  •  MICHELIN Power Slick Ultimate
    Designed for experienced racers looking for quick lap times, this range is directly derived from the latest technological advances tested on the circuit.
  • MICHELIN Power Cup Ultimate
    This tire is a treaded version of the MICHELIN Power Slick Ultimate.
  • MICHELIN Power Slick Evo
    The MICHELIN Power Slick Evo is intended for the track and is ideal for weekend racer. Easy to handle, it features MICHELIN Adaptive Casing Technology (ACT) and a new highly versatile rubber compound that avoids having to make difficult tire choices related to weather and track conditions.
  • MICHELIN Power Cup Evo
    This tire is the treaded version of the MICHELIN Power Slick Evo.
  • MICHELIN Power SuperSport Evo
    The MICHELIN Power SuperSport Evo is designed for both road and track use. It delivers excellent longevity combined with wet and dry performance due to a combination of new rubber compounds and MICHELIN Adaptive Casing Technology (ACT).

Having officially announced its return to MotoGP in 2016, Michelin is gearing up for a new challenge in this premier motorcycle racing championship where bikes deliver up to 250 hp. A continuously evolving showcase of advanced technology, MotoGP is set to adopt the 17-inch wheel size which is the market standard for sports and road motorcycles which means more than ever we’ll begin to see MotoGP inspired and developed rubber available for sale.

Michelin to Launch Six New Hypersport and Track Tires in 2015

 

What Are Asymmetric Motorcycle Tires And Do I Need Them?

This question actually came from one of our readers who asked what an asymmetric motorcycle tire was and was it something they needed at the track. The answer to the second part of the question is simple.  No, you almost certainly do not need an asymmetric motorcycle tire.  They are an extremely specialized tire that is only used for a few tracks in MotoGP each year and then only for specific classes. Any amateur or even semi-professional using them would be engaging in overkill.

So lets look at the first part of the question then – what is an asymmetrical motorcycle tire? The term asymmetric actually means different things in the tire world depending on who you speak to and what the tire is used for. For the vast majority, an asymmetric tire describes an asymmetric tread pattern (that is, not symmetrical). This term is almost solely used for cars, as the unlike a bike where the tire leans, a car tire turns.

In the world of motorcycles, an asymmetric tire usually refers to a tire that has differing compounds on the respective shoulders of the tire. For example, one side of the tire may have a soft compound and the other a super soft compound. Such a tire is used at tracks that have a considerably higher amount of cornering forces on one particular side. Such a force increases temperatures on that side of the tire, while the other side experiences lower temperatures. The difficulty then created is two extremes on either side of the tire at a single track.

Bridgestone MotoGP Tire Asymmetric

Bridgestone, the current tire supplier for MotoGP has been supplying asymmetric rear slick tires for a number of years now.  And this year they’re introducing an asymmetrical front slick for use at Phillip Island and Valencia this year.

So unless you race at particular circuits and are so good that you’re at the extreme limits of your tire, there’s absolutely no need for you to ever make use of an asymmetrical motorcycle tire. Nevertheless it’s an interesting piece of tire technology and shows just how far the elite riders push the limits of their machines.