Dunlop Parts

Dunlop Motorcycle Tires — Championship Grip, PCBT Innovation & Geomax Technology

### Brand Heritage & Championship Supremacy Founded in 1888 with the invention of the pneumatic tire by John Boyd Dunlop in Belfast, Northern Ireland, Dunlop has evolved into the most dominant tire manufacturer in motorcycle racing history. In American motocross and supercross, Dunlop holds an extraordinary competitive record: every single AMA Supercross and Pro Motocross champion for over a decade has ridden to victory on Dunlop Geomax tires.

Dunlop's off-road tire development is headquartered in Buffalo, New York, and Huntsville, Alabama, where a dedicated team of tire engineers, chemists, and professional test riders continuously refine rubber compounds, casing tension architectures, and tread block geometries. Dunlop's philosophy centers on translating factory racing technology directly into commercial tires, ensuring that everyday racers and weekend trail enthusiasts experience the exact same traction, carcass compliance, and predictability demanded by world-class champions.

• Geomax MX34 Front & Rear Tires: The benchmark soft-to-intermediate motocross tire featuring Progressive Cornering Block Technology (PCBT) and optimized mud-evacuation block spacing.
• Geomax AT81 & AT81 RC Enduro Rear Tires: The premier all-terrain cross-country and GNCC racing tire featuring high-durability polymer compounds and Lateral Groove shoulder knobs.
• Geomax MX53 Intermediate-to-Hard Tires: Multi-ply hard-pack tires engineered with revolutionary horseshoe block siping for maximum grip on baked clay and blue-groove tracks.
• Geomax MX14 Sand & Mud Scoop Tires: Extreme deep-sand and mud scoop tires designed for maximum forward drive in unyielding soft terrain.
• Heavy-Duty & Ultra Heavy-Duty Inner Tubes: Natural rubber competition inner tubes engineered to resist pinch flats and punctures under low-pressure off-road conditions.

### How Dunlop Geomax Tires Outperform Competitor & Stock Rubber Factory OEM tires fitted to stock motorcycles often feature generic rubber formulations and budget carcass plies designed to lower production costs: 1. Progressive Cornering Block Technology (PCBT): Dunlop's patented 'block-in-a-block' shoulder knob architecture allows individual tread elements to flex and grip independently as lean angle increases, delivering predictable edge bite into rutted corners without sudden washouts. 2. Carcass Tension Control System (CTCS): Unlike stiff generic tires that bounce off square-edge bumps and deflect off-line, Dunlop's tuned casing plies absorb track chatter and braking bumps, keeping the rubber contact patch glued to the dirt. 3. Advanced Carbon Black & Polymer Matrices: Dunlop's high-density molecular binders resist knob tearing and chunking across sharp shale and rocky terrain, extending tire edge life over dozens of hard motos.

### Chemical Compounding & Carcass Mechanics Dunlop's proprietary tread compounds incorporate micro-fine carbon black particles dispersed within high-grade natural and synthetic elastomers. This microscopic bonding creates exceptional molecular shear strength, preventing the tread blocks from tearing away from the casing carcass under extreme acceleration on hard-pack tracks or sharp rock gardens. The ply angles of the carcass are engineered to deflect under landing impacts, acting as a secondary suspension component that reduces chassis harshness.

• Motocross Pressures: For standard track conditions using heavy-duty inner tubes, set front cold tire pressure between 12.5 and 13.5 PSI, and rear cold tire pressure between 12.0 and 13.0 PSI.
• Enduro & Woods Setup: For technical rocky singletrack using the AT81, run 11.0 to 12.0 PSI with heavy-duty tubes, or pair with bib mousse inserts for flat-proof extreme enduro reliability.
• Rim Lock Torques: Always torque rim lock nuts to 14-16 Nm to prevent the tire bead from spinning on the rim during hard acceleration.
• Bead Seating: Lubricate the tire bead with mounting lubricant during installation, inflating to 30 PSI to pop the bead evenly onto the safety humps before dropping to operating pressure.

Frequently Asked Questions