Plews Tyres EN1 Grand Prix Spec B (15mm grips) 140/80-18 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.