Comparison of Bias Ply Tires Versus Radial Tires
Modern Radial Tires
Advantages of radial tires include:
|
Longer tread life |
|
Better steering
characteristics |
|
Less rolling resistance, which
increases gas mileage |
Disadvantages of radial tires:
|
Higher cost -- technologically,
radial tires are more complex than bias ply tires, so they cost more to produce |
|
Not period correct, not true to the
original equipment of most antique cars |
Period Correct Bias Ply Tires
Advantages of bias ply tires include:
|
Load carrying capability in
relation to tire size is greater than radial tires. That is, a bias ply tire can carry a greater load
than a similar sized radial tire |
|
Cost of production is lower than
radial tires |
|
Originality of bias ply tires is a
foundational concept to the hot rod industry, whether you have a traditional rod or a custom street
rod. The bias ply tire has esthetic appeal for those who desire a true period look |
Disadvantages of bias ply tires:
|
Wear down faster, due to higher
friction which equates to higher tire temperature |
|
Cornering affects the tread contact
area more than with radial tires, because the area where the tread meets the pavement is smaller and
the sidewall and tread are constructed of one material, so it wears faster |
|
"Standing Set" -- Bias ply tires
that stand still without being driven for long periods of time (such as many antique cars or classic
cars that are only driven on rare occasions) develop flat areas which pound the road until they work
themselves out during driving |
Ride Quality Of Bias Ply And Radial Tires
Ride quality is really a matter of personal choice. The quality of the ride is really based in the
materials used to build the tire, rather than the design type itself. Good or poor ride characteristics can be
found in either design.
In general, though, bias ply tires have kind of a squishy feel. Radials have a firmer riding quality, which most
people prefer.
Will You Choose Bias Ply Or
Radial Tires For Your Hotrod?
So the question remains ... should you install radial tires instead of the original bias ply?
This choice ultimately has to be satisfied by the owner of each vehicle. It comes down to
form over function. Is it worth what you gain by installing radial tires compared to what you give up by not
installing original style tires?
There is no question that the radial tire is a better, “new and improved” design of tire. Yet we drove on bias
ply tires for 70 years. Today they are even more safe and reliable, built with new, modern
materials.
Traditional rod owners will usually choose the period correct bias ply tires, or at least the radials that
replicate the bias ply style.
Street rod owners build their dream cars to be driven and enjoyed, so why not take advantage of the benefits of
the modern radial tire?
|