When slick tyres were first introduced in the early '70s they were all of bias ply construction. Dunlop first introduced radial ply slicks in 1984. Since then both types of slicks have been available for different applications. In our technical article we include the following explanation:
Radial tyres have an inherent advantage of improved traction & braking, and improved compound durability compared to bias ply tyres. This is due to the reinforcing belt under the tread, which promotes a stable, evenly loaded contact area. However this also was directly responsible for making the tyres very difficult to control at the limit of grip. Sudden 'breakaway' was a very serious problem, similar to that problem experienced with the early Dunlop CR70. Developments with radial tyres then were in the areas of making them more 'driveable'. This attribute has not been a factor in developing passenger radials for street use as it is not envisaged that tyres will be driven continually at the limit of adhesion.
Today the demand for bias ply tyres is diminishing and fewer are in production. Whilst Dunlop UK continue to produce bias ply tyres for some applications, Dunlop Japan have ceased completely. The current range of radial ply slicks has increased recently to replace some bias ply sizes no longer available. The current range can be viewed here.
For all technical information re applications and compounds please contact us.