JConcepts Rock Block 1.9" Class 1 tires 4138-02

🚀 JConcepts Rock Block 1.9" - Tires Crawler Asymmetric High Performance

With Rock BlockJConcepts sets a new benchmark for crawlers Class 1. Designed by Adventure Team in Florida, these 4.19” asymmetrical design (L/R) and a rubber compound with a Green Compound tread compound for superb grip on all surfaces: rock, sand, wet or dry earth. Their unique tread pattern, with multifaceted center blocks and massive side studs, ensures grip, precision and longevity.

⚙️ Technical specifications

• Outside diameter : 4.19" (Class 1)
• Width : 1.53" (≈ 39 mm)
• Mounting: rims crawler standard & beadlock 1.9" rims
• Asymmetrical design left/right (L & R marked on side)
• Multifaceted center blocks (3 different sections)
• Zigzag side studs and integrated wear bars
• Constant carcass thickness for stability
• Molded markings with JConcepts logo and references
• Composed of : Green Compound JConcepts (ultra soft)
• Open foam inserts included

🧩 Contents

• 2 JConcepts Rock Block 1.9" tires (Green Compound)
• 2 open cell foam inserts

❗ What to expect

• Rims crawler 1.9" (not included)
• Special RC tire glue (for non-beadlock mounting)

🎯 Who's it for?

• Drivers crawler Class 1 looking for versatility and maximum grip
• Competitors looking to optimize their performance on mixed terrain
• Scale builders demanding realism and efficiency

🔄 Compatibility

• All rims 1.9" beadlock or bonded rims
• standard Class 1 Crawler (≤ 4.19”)