Buy the B F Goodrich ST576 tyre for rugged durability, long tread life, confident wet grip, even wear and a retreadable casing that keeps your fleet moving and costs down across New Zealand.
BFGoodrich ST576
Only left Nationwide
Five-Rib Steer Pattern. The five-rib layout on the B F Goodrich ST576 stabilises the contact patch under high steer-axle loads, equalising footprint pressure to suppress river wear and cupping while maintaining precise on-centre tracking. A continuous centre rib enhances directional stability and lane-keeping, and the lateral micro-siping within the shoulder ribs manages shear strain to reduce rib squirm, lowering tread block hysteresis for cooler running at sustained highway speeds. The result is more uniform wear across the crown and shoulders, predictable steering response, and extended usable tread life for lower cost per kilometre.
Decoupling Groove Shoulder. A dedicated shoulder decoupling groove isolates the outer rib from the main belt package, relieving shear stress at the shoulder edge where heat concentration and tearing typically initiate on steer tyres. By allowing controlled shoulder deflection, it reduces step-down wear and heat build-up, protecting the belt-edge and ply turn-up from fatigue. This architecture helps keep casing temperatures lower in New Zealand’s mixed linehaul and regional routes, improving durability and preserving the integrity of the ST576 casing for multiple retread cycles.
Stone Ejector Geometry. Engineered stone ejectors in the circumferential grooves actively disrupt stone retention and prevent drilling into the belt skim, a critical defence on coarse NZ chipseal and metal access roads. By minimising embedded stone dwell time, the ST576 reduces puncture initiation sites and mitigates corrosion pathways along steel cord filaments, preserving belt adhesion and splice strength. Cleaner grooves also maintain effective water evacuation under wet braking, sustaining contact patch drainage efficiency and reducing the risk of groove-cracking from trapped debris.
High-Tensile Casing Construction. The ST576 casing employs high-tensile steel cords in a robust belt package with a full-width cap layer to control growth at speed, coupled with a strong bead bundle and airtight innerliner for inflation retention. This construction resists ply steer and conicity for straighter tracking, while distributing load through the footprint to curb shoulder hotspots. Enhanced cord fatigue resistance and belt-edge stability improve endurance under repeated side loads typical of steer axles, delivering a casing that is highly retreadable and maintains structural integrity over extended service intervals.
Low Rolling Resistance Compound. A low-hysteresis tread compound, utilising advanced polymer networks with optimised carbon black dispersion, reduces energy loss per deformation cycle to lower rolling resistance without compromising wet grip. By cutting heat generation in the crown, the ST576 maintains cooler running at highway speeds, protecting belt adhesion and reducing oxidative ageing of the rubber matrix. The compound’s abrasion resistance and tear strength support long tread life on steer positions, translating directly into fuel savings and a lower total cost of ownership for fleet operations.