Tires: Radial Vs Bias Ply
Radial tires and bias ply tires are two types of tire construction that have been used on automobiles for many years. While both types of tires have their own unique characteristics and benefits, there are several key differences between the two that are worth considering. When these classics were new they had bias ply tires although we all use radial tires on our classics.
Radial Vs Bias Ply Tire Construction
One of the most significant differences between radial and bias ply tires is the way in which they are constructed. Radial tires are constructed with the cords (the layers of fabric that run parallel to the tread) running at a 90-degree angle to the tire’s centerline. This gives the tire a more flexible sidewall and improved handling and fuel efficiency. The flexibility of the sidewall allows the tire to absorb more of the shock and impact from the road, resulting in a smoother ride.
Bias ply tires, on the other hand, are constructed with the cords running at an angle, usually around 45 degrees. This gives the tire a stiffer sidewall and a more robust construction, but at the cost of reduced handling and fuel efficiency. The stiffness of the sidewall means that the tire is less able to absorb shock and impact from the road, resulting in a rougher ride.
Another key difference between radial and bias ply tires is the way in which they handle the heat. Radial tires are designed to dissipate heat more effectively than bias ply tires, which makes them better suited for high-speed driving. The flexible sidewall of a radial tire allows for better ventilation, which helps to keep the tire cool and prevents heat build-up. Bias ply tires, on the other hand, are more susceptible to heat build-up, which can lead to failure at high speeds.
In terms of durability, bias ply tires tend to be more robust and long-lasting than radial tires. This is due to the fact that they have a thicker, more heavily-constructed sidewall, which makes them less prone to damage from road debris or other impacts. Radial tires, on the other hand, have a thinner, more flexible sidewall, which makes them more prone to damage.
Radial Vs Bias Performance
In terms of performance, radial tires tend to offer better handling and fuel efficiency than bias ply tires. The flexible sidewall of a radial tire allows it to contour to the road more effectively, which helps to improve traction and stability. This is especially important when driving at high speeds or in wet or slippery conditions. Bias ply tires, on the other hand, have a stiffer sidewall, which makes them less agile and less able to maintain a firm grip on the road.
One thing to note is suspension geometry and your tires. Bias ply tires like negative casters (where the upper ball joint is in front of the lower ball joint), whereas a radial tire like positive casters (upper ball joint behind the lower ball joint). When switching from bias to radial tires on our classics, it’s best to have an alignment to adjust the caster for maximum performance and handling.
Radial tires and bias ply tires are two very different types of tire construction that have their own unique characteristics and benefits. Radial tires offer improved handling, fuel efficiency, and a smooth ride, but are more expensive and less durable than bias ply tires. Bias ply tires, on the other hand, are more affordable and long-lasting, but offer a rougher ride and less impressive performance. Ultimately, the choice between radial and bias ply tires will depend on the specific needs and preferences of the driver, as well as the type of vehicle and driving conditions they will be encountering.
If you have any other questions or need to order up any parts for your ride, hop on SS396.com or give our friendly techs a call at (203) 235-1200
