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OTR tires: off-the-road construction and mining tires
OTR tires (off-the-road tires) are tires for wheel loaders, motor graders, articulated and rigid dump trucks, scrapers and port equipment that work on construction sites, quarries and mines. OTR tires are identified by size and by a TRA tread code that describes the machine type and tread depth.
TRA tread codes for OTR tires
- L codes (loaders and dozers): L-2 traction, L-3 rock, L-4 deep rock, L-5 extra-deep rock. L-3 is the most common wheel loader tread.
- G codes (graders): G-1 rib, G-2 traction, G-3 rock.
- E codes (earthmovers and haulers): E-2 traction, E-3 rock, E-4 deep rock.
A higher number within each code means deeper tread for more cut resistance on rock and abrasive surfaces.
OTR tire size formats
Bias OTR tire sizes such as 17.5-25 and 20.5-25 give the section width in inches and the rim diameter in inches. Radial OTR tire sizes such as 17.5R25 and 23.5R25 use an R for radial construction. Wide-base OTR sizes such as 750/65R25 give the section width in millimeters and the aspect ratio.
Bias vs. radial OTR tires
Radial OTR tires run cooler, last longer and give a smoother ride on haul roads, which suits loaders and haulers that travel long distances on site. Bias OTR tires have stiffer sidewalls that resist cuts and cost less, which suits short-cycle loading in rock. Radial OTR tires show load capacity with stars (1★, 2★, 3★); bias OTR tires use ply ratings such as 16-ply or 20-ply.
Replacing OTR tires on loaders and graders
OTR tires on the same axle must match in size, tread code and construction, because a mismatched pair loads the axle unevenly. Wheel loaders replace OTR tires in axle pairs; motor graders run six OTR tires of one size, and the four tandem drive tires are kept at matching tread depth.
Inflation and load for OTR tires
OTR tires are inflated to the pressure the tire maker lists for the machine's working load, not to a fixed number. An underinflated OTR tire flexes and overheats on long haul roads, which separates the tread; check OTR tire pressure cold at the start of each shift.
Ordering OTR tires with NeoTires
OTR tires are ordered by size, TRA code and construction, all molded on the sidewall of the current tire, such as 20.5-25 L-3 16PR. Search that size on NeoTires, compare bias and radial options by price and brand, and add the axle pair to the cart. NeoTires dispatches OTR tires the same day and ships them nationwide, free where the listing shows Free shipping; Klarna, Affirm and Afterpay financing is available at checkout for spreading the cost.
OTR tires: off-the-road construction and mining tires
OTR tires (off-the-road tires) are tires for wheel loaders, motor graders, articulated and rigid dump trucks, scrapers and port equipment that work on construction sites, quarries and mines. OTR tires are identified by size and by a TRA tread code that describes the machine type and tread depth.
TRA tread codes for OTR tires
- L codes (loaders and dozers): L-2 traction, L-3 rock, L-4 deep rock, L-5 extra-deep rock. L-3 is the most common wheel loader tread.
- G codes (graders): G-1 rib, G-2 traction, G-3 rock.
- E codes (earthmovers and haulers): E-2 traction, E-3 rock, E-4 deep rock.
A higher number within each code means deeper tread for more cut resistance on rock and abrasive surfaces.
OTR tire size formats
Bias OTR tire sizes such as 17.5-25 and 20.5-25 give the section width in inches and the rim diameter in inches. Radial OTR tire sizes such as 17.5R25 and 23.5R25 use an R for radial construction. Wide-base OTR sizes such as 750/65R25 give the section width in millimeters and the aspect ratio.
Bias vs. radial OTR tires
Radial OTR tires run cooler, last longer and give a smoother ride on haul roads, which suits loaders and haulers that travel long distances on site. Bias OTR tires have stiffer sidewalls that resist cuts and cost less, which suits short-cycle loading in rock. Radial OTR tires show load capacity with stars (1★, 2★, 3★); bias OTR tires use ply ratings such as 16-ply or 20-ply.
Replacing OTR tires on loaders and graders
OTR tires on the same axle must match in size, tread code and construction, because a mismatched pair loads the axle unevenly. Wheel loaders replace OTR tires in axle pairs; motor graders run six OTR tires of one size, and the four tandem drive tires are kept at matching tread depth.
Inflation and load for OTR tires
OTR tires are inflated to the pressure the tire maker lists for the machine's working load, not to a fixed number. An underinflated OTR tire flexes and overheats on long haul roads, which separates the tread; check OTR tire pressure cold at the start of each shift.
Ordering OTR tires with NeoTires
OTR tires are ordered by size, TRA code and construction, all molded on the sidewall of the current tire, such as 20.5-25 L-3 16PR. Search that size on NeoTires, compare bias and radial options by price and brand, and add the axle pair to the cart. NeoTires dispatches OTR tires the same day and ships them nationwide, free where the listing shows Free shipping; Klarna, Affirm and Afterpay financing is available at checkout for spreading the cost.
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