Overview

The RR905 uses a wide footprint with a solid shoulder design, 5-rib/4-groove layout, and circumferential zig-zag grooves to channel water while resisting debris penetration. Available in sizes from 385/55R19.5 to 445/45R19.5, it covers the broad range of wide-base all-position applications in mixed service and regional use.

Why This Tire Matters

Wide-base tires face a debris-penetration challenge that narrower tires don't. The larger contact patch simply encounters more potential punctures per revolution. The RR905's zig-zag groove design addresses this with wider tread elements at the groove base — the area where most penetration damage occurs — making it harder for sharp objects to reach the belt package. At the same time, the zig-zag geometry maintains water-channeling capability for wet-road safety. Goldtop customers running wide-base setups on regional vocational trucks have found this design provides a meaningful reduction in puncture-related downtime.

Key Features

• Wider Footprint with Solid Shoulder Design — The broad contact patch spreads load pressure for even wear, while the solid shoulder resists the irregular wear that wide-base tires are prone to in high-scrub applications.
• 5-Rib, 4-Groove Layout with Zig-Zag Circumferential Grooves — The zig-zag pattern channels water efficiently while the non-linear groove path breaks up the standing wave that can cause hydroplaning in straight-groove designs.
• Wider Tread Elements at Groove Base — By widening the tread rubber at the deepest point of the groove, the design reduces the likelihood of sharp objects reaching and penetrating the belt package — a common failure point in wide-base tires.
• Broad Size Range for Wide-Base Applications — Covers 19.5" and 22.5" wide-base sizes, accommodating various vocational truck configurations.

Best For

Regional vocational trucks running wide-base tires in mixed-service conditions; fleets operating on roads with frequent debris; operations where puncture resistance is a primary tire selection criterion.

Technical Specs