TBR tires

TBR tire is the abbreviation of Truck and Bus Radial tire. TBR tires are mainly used for Truck and Bus vehicles and are sometimes referred to as commercial tires because they are often used for commercial vehicles. The TBR tire structure is made from an all steel wire, so the TBR tire has better loading performance compared to a bias tire (see differences between Radial and Bias tires below) TBR main sizes include 6.50R16LT, 7.00R16LT, 7.50R16LT, 8.25R16LT, 9.00R20, 10.00R20, 11.00R20, 12.00R20, 11R22.5, 12R22.5, 13R22.5, 315/80R22.5, 12.00R24, 325/95R24, 295/80R22.5, 11R24.5, 12R24.5, 425/65R22.5, 445/65R22.5 etc.

PCR is the abbreviation of Passenger Car Radial tire. PCR tires are mainly used for cars and are often referred to as car tires directly as they are mainly used for cars. PCR main sizes include 185/65R14, 195/70R15, 235/75R15, 215/60R16, 225/65R17, 225/45R18, 255/60R19, 275/55R20 etc.

PCR tires

OTR tires

OTR is the abbreviation of Off The Road tire. OTR tires are mainly used in construction and mining settings and are usually large and heavy meaning that these vehicles are not suitable for general road use. OTR main sizes include 16.00R24, 16.00R25, 17.5R25, 18.00R33, 20.5R25, 23.5R25, 26.5R25, 29.5R25, 21.00R33, 21.00R35, 27.00R49, 30.00R51, 33.00R51, 36.00R51, 40.00R57, 35/65R33 etc.

Radial & Bias tires

The terms "Radial" and "Bias Ply" are used to describe the internal construction of a tire. The difference between them may seem small, but it has a significant impact on the way the tire performs. tires are actually made by stacking layers of rubber and reinforcing fabric. Cotton was once used to reinforce tires, but now nylon, polyester, rayon, fiberglass, and even Kevlar are used. Each layer is called a "Ply". The difference between radial and bias ply tires is the way the plies are laid in relation to each other.

When building a Bias Ply tire, reinforcing cords are laid diagonally across the tire. (Usually, 30° - 40° from the direction of travel.) Each additional ply has the cords laid at an opposing angle. This creates a criss-cross pattern. Finally, more rubber is applied over the plies to create the tread. Most bias ply tires are 4 ply, meaning they have 4 layers of reinforcing fabric cords. More layers makes for a stronger tire. 6 ply, 8 ply, and even 10 ply tires are available for heavier vehicles. a bias ply tire, the sidewall and the tread are both supported by the same reinforcing plies. This gives the tire certain characteristics.

Bias Ply Construction

Radial Construction

When building a Radial tire, reinforcing cords are laid at a 90° angle from the direction of travel. Each additional ply is laid in the same direction as the one underneath it. Then, reinforcing belts are added. Belts can be made from woven strands of steel, nylon, Kevlar, or other material. Finally, more rubber is applied over the belts to create the tread. In a radial tire, the sidewall and the tread function as two independent parts of the tire. Radial tire construction has progressed since the early 1970's and has many benefits over bias ply construction.