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6 Days Extreme on Yamaha WR 450F 2016 model




MCE 6 DAYS EXTREME, the dominant enduro winning tyre from METZELER, is the original equipment for the new Yamaha WR450F

The new enduro racer from the ‘tuning forks’ brand will use the tyres that have won twenty-six Enduro World Championships (in 90/90 - 21 M/C 54M M + S front and 130/90 - 18 M/C 69M M + S rear sizes)

Almería (Spain), 4 December 2015 – The multiple enduro winning tyre METZELER MCE 6 DAYS EXTREME is selected by Yamaha as the original equipment for the new WR450F in 90/90 - 21 M / C 54M M + S front and 130/90 - 18 M / C 69M M + S rear sizes.

The choice for Yamaha was a natural one: MCE 6 DAYS EXTREME is an enduro FIM homologated tyre for competition with which the brand with the elephant logo has won 26 titles in the FIM Enduro World Championship, in just eleven years.


The involvement of METZELER in Enduro has been successful since 1935. Complying with FIM regulations, MCE 6 DAYS EXTREME was developed with factory riders as the ideal solution to take advantage of the benefits offered by current high-performing motorcycles that are dominating the most important international championships.

The involvement in the Enduro World Championship, which requires the highest performances in term of traction, resistance and durability, as well as the feedback from the riders, is the main source of technical development and engineering output for the MCE 6 DAYS EXTREME.

All this has contributed in strengthening the involvement of the German brand in the off-road segment, highlighting the reliability and high performance of its tyres and further reinforcing METZELER’s winning heritage.

Regarding the compounds, the MCE 6 DAYS EXTREME uses a high performance Carbon Black to reinforce the structure of the knobs in such a way that, especially at high temperatures reached in racing, the tread is more stable, ensuring better accuracy and trajectory, giving better grip both on dry and slippery surfaces. An ad hoc design of polymers allows a better resistance to abrasion, cuts and tears so as to have a tyre in perfect condition on all terrains.

Enduro competitions require the motorcycles to adapt to different terrains, therefore versatility of the tyres is a must. Thanks to the use of a casing with Polyester material with high strength and X-Ply construction, the MCE 6 DAYS EXTREME boasts superior structural characteristics and an overall improvement of stiffness that results in an increase of shock absorbing properties and structural stability. For the rider, this means more predictable feedback from the tyre, enhancing control over the motorcycle in all conditions. The balance between rigidity and overall flexibility of the polyester provides excellent resistance to puncturing, especially on rocky terrain where tyre pressure is often lower than normal.

MCE 6 DAYS EXTREME enjoys a particularly smooth contour design of the rear tyre, ensuring great traction and enhanced tread-wearing resistance thanks to a wide contact patch area that has more knobs at every lean angle for better digging into the terrain and reducing the specific stresses.

Regarding the tread pattern design, the front tyre presents in the central pitch, knobs with wide open spacing so that they enhance self cleaning properties allowing the tyre to effectively dig into soft terrain.

The knobs also have a V distribution on the tread from the centre to the sides plus a specific asymmetrical design of the centre knobs for maximum precision in straight riding with enhanced braking stability.

The sharp edges of half shoulder knobs have a directional design to improve the stability and controllability in turns at any lean angle.

The rear tyre has an alternate knob geometry central pitch design which ensures high traction thanks to the larger knobs with rolling continuity on straight line riding with the presence of mid size knobs.

The rear also features a specific alignment of knob distribution from the centre to the sides on a diagonal line so as to ensure maximum lateral support when cornering on any terrain.

The geometry and alignment of the half shoulder knobs offer a greater controllability of the machine whilst pushing forward and powering out of the corners. This offers a better overall response to forces and obstructions. 

In addition to those supplied to Yamaha WR450F, MCE 6 DAYS EXTREME is available in 90/90 – 21 M/C 54M M+S (new), 90/90 – 21 M/C 54M M+S (Hard) e 90/100 – 21 M/C 57M MST front and 120/90 – 18 M/C 65M M+S, 140/80 – 18 M/C 70M M+S (new) and 140/80 – 18 M/C 70M M+S Soft (new) rear sizes.

MCE 6 DAYS EXTREME has in fact been renewed, in particular at the level of compounds and tread pattern, in the sizes 90/90 - 21 front and 14  80 - 18 rear also introducing the new 140/80 – 18 soft rear version.

The last option has a new compound developed especially for indoor activity and the mostextreme races, such as Hell’s Gate, Erzberg and The Tough One.

It features an innovative formulation which has allowed us to obtain a significant decrease of hardness and dynamic stiffness, in all temperature ranges. This result was achieved using dedicated plasticiser components and special polymers, which granted an increase of glass transition temperature. Consequently there is an increase in ‘hysteresis’ at low-medium temperatures, resulting in better grip and ride on the harder terrain normally encountered in extreme riding conditions. At the same time, the tyre presents enough stiffness to avoid excessive transversal movements of the motorcycle ‘back-end’, when accelerating suddenly.


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