EN1 ENDURO GRAND PRIX Rear Spec B 15mm - 140 / 80 – 18

PLEWS TYRES

ENDURO GRAND PRIX RANGE

Pattern Name: GRAND PRIX Spec B

Pattern Number: EN1

2026 Generation | Maximum Traction. Ultimate Versatility.

Introducing the EN1 Grand Prix Spec B, the all-new 2026 high-tread evolution of our Grand Prix enduro platform — developed in response to rider demand for more traction, more versatility, and zero compromise when FIM and ACU regulations don’t apply.

Built using Plews Tyres’ latest softer wet-grip compound and next-generation UK-designed carcass construction by Technical Director Ashley Vowles, the Spec B delivers exceptional traction, control, and confidence across the widest possible range of riding conditions.

With an increased 15mm tread depth — compared to the 13mm race-restricted FIM version — the EN1 Grand Prix Spec B offers significantly enhanced bite in mud, soft terrain, rocks, roots, and extreme conditions.

This is the world’s first FIM-style 140/80-18 enduro pattern engineered with higher tread depth — something riders have been asking for, for years. Now delivered.

Key Features: 

• All-New 2026 Soft Performance Compound
  Purpose-built for superior wet grip, cold condition traction, and all-round performance while maintaining excellent durability.

• Next-Generation UK-Designed Carcass
  Optimised for improved footprint stability, rider feedback, impact absorption, and traction under aggressive riding loads.

• 15mm High-Traction Tread Depth
  Delivers increased grip in soft, technical, and extreme terrain — perfect for riders who want maximum performance beyond race restrictions.

• Tread Design and Tyre Geometry: Engineered for maximum grip and comfort, the EN1 pattern features a meticulously crafted tread design aimed at reducing chipping, chunking, and premature block tearing, ensuring durability and longevity while maintaining optimal performance.
  
  
  

• CCRC Technology: Our Compound Chipping and Chunking Resistant (CCRC) technology is a compound design philosophy aimed at minimizing chipping and chunking, ensuring durability and longevity while maintaining optimal performance.
  
  
  

• CCT Technology: Our Chipping and Chunking Tread (CCT) technology is a specialized tread design approach aimed at reducing chipping and chunking. With this innovative technology, the EN1 tyre delivers exceptional traction and control across various terrains, providing you with the competitive edge you need to outperform the competition.

• Ultimate Versatility – Fully Road Legal
  Unlike extreme enduro tyres, the EN1 Grand Prix Spec B is fully ECE road approved, making it ideal for:

  • Enduro riding
  • Green laning
  • Play riding
  • Hard enduro training & racing
  • Technical trail riding
    

Available Sizes:

• Rear: 140/80-18
  

• ECE Approved – Fully Road Legal

Homologation: Not ACU or FIM Time Card Legal
Designed specifically for riders who are not restricted by the 13mm FIM tread depth regulation.

More traction. More terrain. More freedom.

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