Motorcycle Tire Tread Segmentation for Grip and Wear
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Solution Overview
Problem
Motorcycle tires face challenges in simultaneously achieving high dry grip performance, wet braking performance, abrasion resistance, ice performance, and uniform color tone, as these properties are typically contradictory and difficult to improve simultaneously.
Innovation Solution
A motorcycle tire design with a tread portion divided into three parts in the tire width direction, featuring a center rubber composition with high styrene-butadiene rubber, silica, and carbon black content for improved wet braking and abrasion resistance, and shoulder rubber compositions with higher styrene-butadiene rubber and carbon black for enhanced dry grip, while maintaining a uniform color tone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single rubber composition is used for the entire tread rubber, then the manufacturing process is simple, but it is impossible to simultaneously achieve high dry grip performance, wet braking performance, and abrasion resistance
Solution Approach 1:
The tread rubber is divided into three distinct regions (center rubber, first shoulder rubber, second shoulder rubber) with different compositions optimized for their specific functional requirements. The center rubber contains silica for wet braking performance, while the shoulder rubbers contain carbon black for dry grip performance, allowing each region to perform its specialized function without compromising the others.
Solution Approach 2:
Different rubber compositions are applied to different regions of the tread based on their specific performance requirements. The center portion uses a silica-rich composition for wet conditions, while the shoulder portions use carbon black-rich compositions for dry conditions, ensuring optimal performance in each local area.
Data Source
Figure 1
AI summary
Provided is a motorcycle tire having excellent overall performance including dry grip performance, wet braking performance, abrasion resistance, ice performance, and color tone. Included is a motorcycle tire having a tread portion including a tread rubber, the tread rubber being divided into at least three parts in the tire width direction, the tread rubber including a center rubber at its center, viewed in the tire width direction, and shoulder rubbers respectively on opposite sides of the center rubber, viewed in the tire width direction, the center rubber being formed of a center rubber composition containing predetermined amounts of a rubber component with a predetermined styrene-butadiene rubber content, silica, carbon black, and a resin, the shoulder rubbers each being formed of a shoulder rubber composition containing predetermined amounts of a rubber component with a predetermined styrene-butadiene rubber content, silica, carbon black, and a resin.