Tirex LLC
Tires For The 21st Century
Firestone OTR Tire Index
Performance Finder | Tire Classifications | Front Axle Bias Tire Inflation
Technical Specifications
Firestone OTR Tires  Loader/Dozer Tire Classifications (L2-L5)

Function: Transporting / Haulage

TRA Tread Type Radial Tread Patterns Bias Tread Patterns
L-2 Traction VKT, VLT SGG LD, FG
L-3 Rock VKT, VMT, SGR SRG LD, RL
L-4 Rock Deep VALS, VCH SRG DT LD, RLS, RLS2, NL
L-5 Rock Extra-Deep VSDL, GSR, SDT SDT LD, DL
L-3S Smooth
PL TRD, LD
L-4S Smooth Deep
PL TRD LD
L-4S Smooth Extra-Deep VSMS PL TRD LD, PLTRD LD UMS, STMS
L5/
L5S
Half Extra-Deep
Half Tread LD DT, DL2

 

Characteristics:


Cut Resistance

Wear Resistance

 

Tread Classifications

L3 Deep Tread
100%
L4 Extra Deep Tread
250%
L3 Regular Tread
100%

 

Tire Size Designation


Regular (SH/SW=0.95) 27.00 Section Width (inches)
R Radial Structure 49 Rim Diameter (inches)
** Star Rating

Wide Base (SH/SW=0.8) 33.25 Section Width (inches)
R Radial Structure 35 Rim Diameter (inches)
** Star Rating

Super Wide Base (SH/SW=0.65) 40/65 Section Width (inches)
R Aspect Ratio 65 Series
39 Rim Diameter (inches)
30PR Ply Rating

 

Sidewall Markings (Off-The-Road Tires)

1. Brand Name

2. Bridgestone's Specification Code

3. Pattern Name

4. Serial Number

5. Size

6. Star Rating, Tubeless or Tubetype