Overview

The RLB400 takes the closed-shoulder concept and pushes tread depth to 30/32" — deeper than most highway drive tires and approaching severe-service territory. With stone drilling protectors and a multi-extruded tread package that runs cooler, it's built for regional and mixed-service fleets that need more mileage between changes than a standard highway tire delivers.

Why This Tire Matters

Regional fleets face a different wear pattern than long-haul operators. More stops, more turns, more scrubbing. The RLB400's extra-deep 30/32" tread provides the rubber volume to handle accelerated wear cycles while the multi-extruded tread package — where different rubber compounds are layered within the tread — manages heat buildup that would normally shorten the life of such a deep tread. Our customers in Middle Eastern regional distribution, where trucks run high-gross-weight loads on secondary roads in ambient temperatures above 40°C, find this combination of depth and thermal management keeps tires in service longer.

Key Features

• Extra-Deep 30/32" Tread — That's roughly 15% deeper than a standard highway drive tire. More rubber on the road means more miles before replacement — a straightforward benefit for fleets that measure tire cost per kilometer.
• Multi-Extruded Tread Package — By layering different rubber compounds within the tread — a cooler-running base layer topped with a wear-resistant cap — the RLB400 manages the heat that normally limits how deep a tread can be before it starts running too hot at highway speeds.
• Stone Drilling Protectors — Raised elements in the groove bottoms prevent stones from working through to the steel belt package. Belt damage is the leading cause of premature casing retirement from otherwise usable tires.
• Heavy-Duty Casing for Multiple Retreads — The casing is built to survive the first life and come back for a second and third. For regional fleets, retreading is the difference between acceptable and excellent tire cost per km.

Best For

Regional distribution fleets running high-mileage secondary-road routes; mixed-service operations splitting time between pavement and gravel; fleets in hot climates that need a deep-tread drive tire that doesn't overheat; operators who retread and need casings that come back strong.

Technical Specs