TABLE H
High Flotation Tires Used in Agricultural, Logging and Off-the-Road Service
TIRE TYPE NOMENCLATURE
Code No. Tire Type
HF-1
HF-2
HF-3
HF-4

Shallow Tread
Regular Lug Tread
Deep Lug Tread
Extra Deep Lug Tread

 
MAXIMUM SPEED - 30 MPH (50 KM/H)
TIRE
SIZE
TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
psi
kPa
10
70
15
100
20
140
25
170
30
210
35
240
40
280
45
310
50
340
42x25.00-20lbs.19802540300034203740 (8)4180 (10)44004800 (12) 
 kg9001150136015001700 (8)1900 (10)20002180 (12) 
48x25.00-20lbs.300037404400 (6)50805680 (8)6150 (10)66007150 (12) 7600 (14)
 kg136017002000 (6)23002575 (8)2800 (10)30003250 (12)3450 (14)
48x31.00-20lbs.308039604680 (6)5360 (8)5840 (10)64006950 (12)7400 (14) 
 kg140018002120 (6)2430 (8)2650 (10)29003150 (12)3350 (14) 
800/50-25lbs.374046805520640071507850 (12)   
(54x31.00-25)kg170021202500290032503550 (12)   
54x37.00-25lbs.39605080 (6)6000680076008250 (12)  10700 (20)
 kg18002300 (6)2725307534503750 (12)  4875 (20)
57x31.00-26lbs.418053606150(6)      
 kg190024302800(6)      
66x43.00-25lbs.58407400 (6)8800 (8)9900 (10)11000 (12)12300 (14)13200 (16)13900 (18) 14800 (20)
 kg26503350 (6)4000 (8)4500 (10)5000 (12)5600 (14)6000 (16)6300 (18)6700 (20)
1050/50R25lbs.61507850935010500117001280013900(172B)  
 kg2800350042504750530058006300(172B)  
66x43.00-26lbs.58407400 (6)8800 (8)9900 (10)11000 (12)12000 (14)   
 kg26503350 (6)4000 (8)4500 (10)5000 (12)5450 (14)   
66x44.00-25lbs.60007600 (6)910010200 (10)114001280013600 (16)14300 (20) 
 kg27253450 (6)41254625 (10)515058006150 (16)6500 (20) 
67x34.00-25lbs.584074008800 (6)10200 (8)11400 (10)12300 (12)13200 (14)  
 kg265033504000 (6)4625 (8)5150 (10)5600 (12)6000 (14)  
67x34.00-26lbs.5840740088009900 (8)11000 (10)12000 (12)13200 (14)  
 kg2650335040004500 (8)5000 (10)5450 (12)6000 (14)  
68x50.00-32lbs.58407400 (6)8800 (8)9900 (12)1100012300 (16)   
 kg26503350 (6)4000 (8)4500 (12)50005600 (16)   
VA73x44.00-32lbs.68008550102001170012800 (12)1430015200 (16)  
 kg30753875462553005800 (12)65006900 (16)  
DH73x44.00-32lbs.68008550102001170012800 (12)1430015200 (16)  
 kg30753875462553005800 (12)65006900 (16)  
76x50.00-32lbs.7850990011700132001480016100(16)17600 18700 (20)  
 kg355045005300600067007300(16)8000 8500 (20)  
78x45.00-32lbs.8050102001200013600 (10)152001650018200 (16)  
 kg3650432554506150 (10)690075008250 (16)  
NOTES 1: Figures in parentheses denote ply rating for which loads and inflation maximum.
2.

 

3:

For operations at other speeds with no change in inflation pressure, the above loads may be changed as shown at the right:

For cycle loading operations where loads increase or decrease, the empty
vehicle load per tire must be less than the percentage of the fully laden tire load
shown below. Maximum load may not be carried for more than one mile
before unloading operation begins. Loading or unloading must be completed
within one mile. This load increase applies to vehicles which operate up to an
11° slope (20% grade). The factors in the chart at the right apply to the
loads and inflation pressures in above table.



MAXIMUMN SPEED (mph) % CHANGE IN LPOADS
20 +12
10 +32
5 +58
CREEP * +100
STATIONARY +165
FERTILIZER TRUCKS WITH HIGH TORQUE
(e.g. WITH INJECTORS)
CYCLIC
EMPTY-TO-FULL
PERCENTAGE
MAXIMUM
SPEED
CHANGE
IN
LOADS
CHANGE IN COLD
INFLATION
PRESSURE
50% 20 MPH / 30 KM/H +50% +5 psi
50% 15 MPH / 25 KM/H +70% +5 psi
50% 10 MPH / 15 KM/H +85% +5 psi
COMBINES AND FERTILIZER TRUCKS
WITHOUT HIGH TORQUE
60% 20 MPH / 30 KM/H +50% +5 psi
60% 15 MPH / 25 KM/H +70% +5 psi
60% 10 MPH / 15 KM/H +85% +5 psi
60% 6 MPH / 10 KM/H +100% +5 psi
FOR RIM AND WHEEL LOAD INFORMATION, SEE IMPORTANT NOTES IN CHARTS I AND II IN GENERAL FARM TIRE INFORMATION