Overview

The RSD4 is a winter drive tire built specifically for icy conditions, with a 29/32" tread depth and a tread compound and pattern optimized for grip on frozen surfaces. 3PMSF-rated, available in 11R22.5 and 11R24.5.

Why This Tire Matters

Snow traction and ice traction are different engineering problems. Snow traction comes from tread void — space in the pattern for snow to pack into and shear against snow on the road. Ice traction comes from tread contact — maximizing the rubber-to-ice interface and using compounds that remain pliable at low temperatures. The RSD4 is tuned toward the ice side of that equation, with a compound that stays flexible in sub-zero conditions and a pattern that maximizes contact area on hard frozen surfaces. The 29/32" depth provides long service life in an application where tires are typically swapped seasonally. For fleets operating in regions where black ice and packed-ice road surfaces are the primary winter hazard, this focus on ice performance matters more than general snow capability.

Key Features

• 3PMSF Severe Winter Certification — Passes the standardized snow traction test, providing regulatory and contractual compliance for winter tire requirements.
• Ice-Optimized Tread Compound and Pattern — The compound remains flexible at temperatures where standard compounds stiffen and lose grip. The tread layout maximizes contact area on hard ice surfaces rather than prioritizing snow-clearing voids.
• 29/32" Deep Tread — Provides the rubber volume for extended service life across multiple winter seasons. Seasonal tires typically see lower annual mileage, so tread depth directly determines how many winters a tire lasts.

Best For

Fleets running winter routes where ice is the primary hazard (black ice zones, freeze-thaw climates); year-round fleets in cold regions that swap to winter drives seasonally; operators who need 3PMSF certification plus maximum ice grip.

Technical Specs