Product Details
For the rider who’s ride doesn’t start until you find the end of the road
The Big Boy is the result of over 24 months of R&D. We set out to bring our world championship-winning Enduro expertise into the world of true off-road adventure — and this is the result.
This is not a tire for Sunday trail rides with your mates. The Big Boy is built for riders who demand real off-road performance from their adventure bike. Mud, rocks, hills, logs, ruts, technical climbs — wherever you want to go, The Big Boy is built to get you there.
With a unique tread layout inspired by traditional enduro tires, The Big Boy delivers outstanding traction, self-cleaning, and control — while being reinforced for the extra weight, torque, and speed of modern adventure bikes. It’s built to handle punishment, and keep gripping when conditions turn brutal.
PLEWS TYRES proprietary carcass stabilisation system that controls sidewall flex under load, ensuring constant forward drive without excessive rolling or traction loss.
A secret blend of high-grade polymers, silica and oils that delivers exceptional wet grip and long-lasting performance across all conditions.
A: Width (120/80-19)
Width of the tire, typically in millimeters, from sidewall across the tread to the opposite sidewall.
B: Aspect Ratio (120/80-19)
The height of the cross-sectional profile expressed as a % of the width of the tire
C: Rim Size (120/80-19)
The third number is the diameter of the wheel in inches.
Example: 120/80-19 or A/B-C [ The width(A) of the tire is 120mm. The sidewall height(B) is 80% of 120 or 96mm. And it fits a 19in wheel(C) ]
Front
| Metric | Alpha | Inch |
|---|---|---|
| 60/100 | 90/80 | 2.50/2.75 |
| 70/100 | 90/90 | 2.75/3.00 |
| 80/90 | MH | 2.50/2.75 |
| 80/100 | 100/80 | 3.00/3.25 |
| 90/90 | MJ90 | 2.75/3.00 |
| 100/90 | MM90 | 3.25/3.50 |
| 110/90 | MN90 | 3.75/4.00 |
| 120/80 | N/A | 4.25/4.50 |
| 120/90 | MR90 | 4.25/4.50 |
| 130/90 | MT90 | 5.00/5.10 |
Rear
| Metric | Alpha | Inch |
|---|---|---|
| 80/100 | 80/90 | 2.50/3.60 |
| 90/100 | 110/90 | 3.60/4.10 |
| 100/100 | 120/80 | 4.00/4.10 |
| 110/90 | MP85 | 4.50/4.75 |
| 110/100 | 130/80 | 4.00/4.50 |
| 120/90 | MR90 | 4.50/4.75 |
| 120/100 | 140/80 | 5.00/5.10 |
| 130/80 | N/A | 5.00/5.10 |
| 130/90 | MT90 | 5.00/5.10 |
| 140/80 | N/A | 5.50/6.00 |
| 140/90 | MU90 | 5.50/6.00 |
| 150/80 | MV85 | 6.00/6.25 |
| 150/90 | MV85 | 6.00/6.25 |
