Jc Rock Bumps green 1.9" 4.25"

JConcepts Rock Bumps 1.9" ? The design revolution with lugs

In the most demanding competition, a tread pattern with lugs is often unbeatable. JConcepts presents the Rock Bumps, a tire specifically designed for the 1.9" Sporty Mini category. It inherits the legendary DNA of "Goose Bumps" and transforms it into the ultimate weapon for rocky terrains. The combination of solid lugs and horizontal and vertical ribs creates a "grip wall" that flexibly adapts to any obstacle.

Why Rock Bumps will change your life:

Maximum ground pressure: The narrow 3.8 cm (1.5") casing concentrates the vehicle's weight on a smaller surface. This increases the pressure on each lug and ensures exceptional ground grip; we call it "Jumbo Traction."

Power center: The huge lugs in the center of the tire bear most of the effort when climbing hills, while the lowered edges create space for the following lugs.

Uncompromising lateral grip: The angular traction ribs on the edges guide the transition to the sidewall. Additional radial ribs and a special "shield" feature on the sidewalls prevent lateral slipping and protect the casing.

Adaptable casing: The continuous contour allows the tire to adapt practically to rocks, bumps, and uneven surfaces. It offers an unparalleled level of flexibility in its category.

Sticky green compound: JConcepts exclusively uses the green rubber compound: sticky, soft, and ready for victory.

Competitive features

Original Rock Bumps design: Unique pin and bar design for maximum versatility.

Performance dimensions: 108 mm (4.25") outer diameter for optimal ground clearance.

Non-slip surface: Dense radial pattern on the sides for increased traction on inclines.

Ready to race: Includes proven React Open Cell (medium) inserts for stable driving.

Authenticity: The JConcepts logos and holograms guarantee genuine American competition quality.

Note: Vehicles, tools, and parts are not included.