Plews Tyres EN1 Grand Prix Spec B Rear

EN1 Grand Prix Spec B
–
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.

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

Not ACU or FIM Time Card Legal

Designed specifically for riders who are not restricted by the 13mm FIM tread depth
regulation.

Rear Size Available
140 / 80 - 18
ECE Approved

Fully Road Legal
More traction. More terrain. More freedom.
#MadeToWin