TABLE I
Diagonal (Bias) Ply Log Skidder Drive Wheel Tires Used in Logging or Forestry Service Other Than on Cable or Grapple Skidders
TIRES USED AS SINGLES
TIRE TYPE NOMENCLATURE
Code No.

Tire Type

LS-2
LS-3
Intermediate Tread
Deep Tread
 
Basic Tire Load Ratings for Tire Selections—MAXIMUM SPEED: 20 MPH (32 KM/H)
  TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
TIRE
SIZE
psi
kPa
20
140
25
170
30
210
35
240
40
280
16.9-30lbs.440050805680 (10)61506600 (14)
 kg200023002575 (10)28003000 (14)
18.4-26lbs.49405680 (10)6400 (12)  
 kg22402575 (10)2900 (12)  
18.4-30lbs.536060006800 (12)  
 kg243027253075 (12)  
18.4-34lbs.56806400 (10)   
 kg25752900 (10)   
23.1-26lbs.7150 (10)82509100 (14)  
 kg3250 (10)37504125 (14)  
24.5-32lbs.88009900 (12)11000 (16)  
 kg40004500 (12)5000 (16)  
28L-26lbs.8250 (12)9350 (14)10200 (16)  
 kg3750 (12)4250 (14)4625 (16)  
30.5L-32lbs.10500 (12)11700 (16)13200 (20)  
 kg4750 (12)5300 (16)6000 (20)  
DH35.5L-32lbs.13900 (16)16100 (20)   
 kg6300 (16)7300 (20)   
NOTES 1: Figures in parentheses denote ply rating for which boldface loads and inflations are maximum.
2: For shipping purposes, tire inflation pressures may be increased to 30 psi.
(Consult tire manufacturer for minimum tire shipping pressure.) This higher inflation pressure must be reduced to operating inflation pressure BEFORE the skidder is removed from the carrier.
3: "Tire Load Limit" for log skidders is defined as the maximum load for an individual
tire due to the total radial forces imposed on the tire DURING OPERATION.
This maximum load includes total vehicle weight with accessories plus load increases
due to log winching or grappling loads and weight transfers.
4 For grapple and cable skidders, refer to Table J.
5 For load and carry type of logging operations such as loaders equipped
with log forks and feller-bunchers, with maximum speed of 5 mph.
above tire load limits may be increased 50% (with 5 psi increase in
inflation pressure). Maximum length of carry is 500 feet.
6 When used as duals, tire loads must be reduced.
Multiply figures in table by .88.
7 Consult rim and wheel manufacturer for rims for this type of service.
8 For transport service and operations that do not require sustained high torque,
the load limits shown to the right at various speeds apply:


MAX. SPEED

% CHANGE IN LOADS IN ABOVE TABLES

CHANGES IN INFL. PRESSURE
Stationary +170% +5 psi
10 MPH / 15 KM/H +20% None
15 MPH / 25 KM/H +10% None
20 MPH / 30 KM/H Same None
25 MPH / 40 KM/H -10% None
FOR RIM AND WHEEL LOAD INFORMATION, SEE IMPORTANT NOTES IN CHARTS I AND II IN GENERAL FARM TIRE INFORMATION