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Battlecross E50: Bridgestone’s All-New Street-Legal Knobbies

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Published on 02.12.2019


Bridgestone has announced the launch of new street-legal enduro rubber for competitions, the Battlecross E50. Leveraging the experience and technologies gained through the development of tires for off-road riding, the Battlecross E50 tires have been designed to deliver high traction and cornering performance on a variety of road surfaces as is required in enduro competitions. The new tires are both DOT approved and compliant with FIM regulations.

The Battlecross E50 employs the company’s proprietary Castle Block technology to ensure effective grip, even on slippery surfaces. A specialized edge, called a bunker, located at the base of the tread blocks enables the tires to exert strong traction on soft surfaces. Bridgestone also used 3D simulations to optimize the shapes and positions of the tread blocks to deliver higher levels of cornering performance in the front tire and enhanced traction performance in the rear tire.

Bridgestone Battlecross E50 Tires


Surfaces such as stones or logs buried in soil and rain-drenched can be extremely slippery. The Castle Block profile incorporates secondary tread blocks that protrude from the conventional tread block profiles to increase total edge components and improve contact pressure on slippery surfaces for enhanced grip.

In turn, the bunker enables the edge portion at the base of the tread block to exert traction even when the block is submerged in a surface.

Engineers set to also change from a harder tread rubber integrated with the sidewall rubber to an optimized dual compound division. Other changes targeted the shape and profile at the bottom part of the sidewall by redesigning the rim guard part. According to Bridgestone, both these modifications increase the mounting ease on the side of the track and improve the rim fitting.

Bridgestone Battlecross E50 Tires

Bridgestone Battlecross E50 Tires

The Battlecross E50 tires are available now in the U.S. and Canada, and will launch in other regions in February 2019.

• Front: Size 90/90-21 M/C 54P W
• Rear Size: 120/90-18 M/C 65P W
• Rear Size: 140/80-18 M/C 70P W

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