Bridgestone X31

Rear tire Cooling Fins™
promote consistent traction and feel under continuous use (such as during a moto) by dispersing heat and minimizing inflation pressure gain
Bunker Groove™ technology
Increased casing flex in tread area improves lug contact for greater traction in harder terrain while helping to maintain sidewall stability. Also provides additional biting edges when lugs are fully embedded in soft terrain.
Symmetric front tire design enhanced with Castle Block™
promotes braking stability while increasing biting edges and contact pressure on soft and slippery surfaces.
Asymmetric rear tire tread design featuring Castle Block™
enhances cornering traction by increasing lateral biting edges.