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T R 505 Road Flex Trailer Chassis Image
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TR505RF (20 Ton)

Trailer Chassis

Road Flex Logo
Capacity 40,000 lbs.
Spindles 3" Dia. 1144 Stress Proof
Hubs (max. speed rating 20 mph) 8 Stud 12,000 lbs. each
Tandem Axle 10 x 4 x .375 Wall
Bolster Stakes 42.5" Fixed
Height From Ground to Top of Bunk 39" on 445/65 x 22.5 Tires
Approx. Weight 5,270 lbs. (less rims and tires)
Bolster Measurement Length (in.)
Bolster Measurement A 140"
Bolster Measurement B 156"
Bolster Measurement C 101"
Bolster Measurement D 55"
4 Wheel HD hydraulic disc brakes (remote) must use 22.5 rim**
2 Wheel HD hydraulic disc brakes (remote) must use 22.5 rim**
4" bolt on riser kit (other heights available)

**Hydraulic brake system also works on a brake pedal outlet kit.

Tire Size Tire Type Rim Size Track Width Capacity (LBS/Tire)
16.5 x 16.1 10 Ply 16.1 x W14C x 8 83" 5,200
19L x 16.1 10 Ply 16.1 x W16C x 8 87" 6,000
21.5 x 16.1 14 Ply 16.1 x W16C x 8 87" 7,850
425 x 22.5 Used Truck 22.5 x 13 x 8 76" 12,000
425 x 22.5 New Recap 22.5 x 13 x 8 76" 12,000
425 x 22.5 New Truck 22.5 x 13 x 8 76" 12,000
445 x 22.5 Used Truck 22.5 x 13 x 8 76" 12,000
445/50 x 22.5 New Recap 22.5 x 13 x 8 76" 12,000
445 x 22.5 New Truck 22.5 x 13 x 8 76" 12,000
400 / 55 x 22.5 16 Ply 22.5 x 13 x 8 76" 7,820
560 / 45 x 22.5 16 Ply 22.5 x 16 x 8 82" 9,640

Capacities listed are max tire capacity. See wagon specifications for maximum wagon capacity.