TABLE B
Radial Ply Symbol-Marked
Agricultural Tractor Drive Wheel Tires
TIRE TYPE NOMENCLATURE
Code No.

Tire Type

R-1
R-1W
Drive Wheel, Regular Tread
Drive Wheel, Wet Traction Tread
 
FOR A8 AND B SPEED SYMBOL TIRES
Basic Tire Load Ratings for Tire Selection MAXIMUM SPEED 30 MPH (50 KM/H)
TIRE SIZE
AND
CONFIGURATION

INFLATION
(PSI)

TIRE LOAD LIMITS (LBS.) AT VARIOUS COLD INFLATION PRESSURES (PSI)
6
8
10
12
14
16
18
20
22
24
26
28
30
SYMBOL






*


**


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12.4R46LI      120  125  129
SINGLES 1610193021502400260028303080330034203640374039604080
DUALS 1420170018902110229024902710290030103200329034803590
TRIPLES 1320158017601970213023202530271028002980307032503350
12.4R54LI      123  128  133
SINGLES 1760209024002680291030803420352037403960418044004540
DUALS 1550184021102360256027103010310032903480368038704000
TRIPLES 1440171019702200239025302800289030703250343036103720
13.6R28LI      117  123  126
SINGLES 1480176019802200240026002830300032003420352036403740
DUALS 1300155017401940211022902490264028203010310032003290
TRIPLES 1210144016201800197021302320246026202800289029803070
14.9R26LI      121  127  132
SINGLES 1710204022702540276030003200342036403860396041804400
DUALS 1500180020002240243026402820301032003400348036803870
TRIPLES 1400167018602080226024602620280029803170325034303610
14.9R28LI      122  128  133
SINGLES 1760209023402600291030803300352037403960418043004540
DUALS 1550184020602290256027102900310032903480368037804000
TRIPLES 1440171019202130239025302710289030703250343035303720
14.9R30LI      123  129  134
SINGLES 1820215024702680300032003420364038604080430044004680
DUALS 1600189021702360264028203010320034003590378038704120
TRIPLES 1490176020302200264026202800298031703350353036103840
14.9R34LI      125  131  136
SINGLES 1930227026002910320034203640386040804300454046804940
DUALS 1700200022902560282030103200340035903780400041204350
TRIPLES 1580186021302390262028002980317033503530372038404050
14.9R46LI      131  137  142
SINGLES 2270268030803420374039604300454048005840536055205840
DUALS 2000236027103010329034803780400042204470472048605140
TRIPLES 1860220025302800307032503530372039404170440045304790
15.5R38LI      125      
SINGLES 1930227026002910320034203640      
DUALS 1700200022902560282030103200      
TRIPLES 1580186021302390282028002980      
16.9R24LI      126  134   
SINGLES 1980234026803000330035203740408043004680   
DUALS 1740206023602640290031003290359037804120   
TRIPLES 1620192022002460271028903070335035303840   
16.9R26LI      128  135   
SINGLES 2040247027603060342036403960418044004800   
DUALS 1800217024302710301032003480368038704220   
TRIPLES 1670203022602530280029803250343036103940   
16.9R28LI      129  136   
SINGLES 2150254029103200352037404080430045404940   
DUALS 1890224025602820310032903590378040004350   
TRIPLES 1760208023902620289030703350353037204050   
16.9R30LI      130  137  141
SINGLES 2200260030003300364038604180440046805080520053605680
DUALS 1940229026402900320034003680387041204470458047205000
TRIPLES 1800213024602710298031703430361038404170426044004660
16.9R38LI      134  141   
SINGLES 2470291033003740408044004680494053605680   
DUALS 2170256029003290359038704120435047205000   
TRIPLES 2030239027103070335036103840405044004660   
18.4R26LI      134  140   
SINGLES 2470291033003740408044004680494053605520   
DUALS 2170256029003290359038704120435047204860   
TRIPLES 2030239027103070335036103840405044004530   
18.4R28LI      135  141  146
SINGLES 2540300034203860418045404800520055204680600064006600
DUALS 2240264030103400368040004220458048605000528056305810
TRIPLES 2080246028003170343037203940426045304660492052505410
18.4R34LI      139      
SINGLES 2830330037404180454049405360      
DUALS 2490290032903680400043504720      
TRIPLES 2320271030703430372040504400      
18.4R38LI      141  146  151
SINGLES 3000352039604400480052005680600064006600695074007600
DUALS 2640310034803870422045805000528056305810612065106690
TRIPLES 2460289032503610394042604660492052505410570060706230
18.4R42LI      143  148  153
SINGLES 3080374041804680508055206000640066006950740076008050
DUALS 2710329036804120447048605280563058106120651066907080
TRIPLES 2530307034303840417045304920525054105700607062306600
18.4R46LI      144  150  155
SINGLES 3300386044004940536058406150660069507400785080508550
DUALS 2900340038704350472051405410581061206510691070807520
TRIPLES 2710317036104050440047905040541057006070644066007010
20.8R34LI      145      
SINGLES 3420396045405080552060006400      
DUALS 3010348040004470486052805630      
TRIPLES 2800325037204170453049205250      
20.8R38LI      147  153   
SINGLES 3640430048005360584064006800715076008050   
DUALS 3200378042204720514056305980629066907080   
TRIPLES 2980353039404400479052505580586062306600   
20.8R42LI      149  155   
SINGLES 3740454050805680615068007150760080508550   
DUALS 3290400044705000541059806290669070807520   
TRIPLES 3070372041704660504055805860623066007010   
23.1R34LI      151      
SINGLES 3960468053606000660071507600      
DUALS 3480412047205280581062906690      
TRIPLES 3250384044004920541058606230      
24.5R32LI      154      
SINGLES 4300508058406400715076008250      
DUALS 3780447051405630629066907260      
TRIPLES 3530417047905250586062306770      
30.5LR32LI      159      
SINGLES 5080615069507600855091009650      
DUALS 4470541061206690752080108490      
TRIPLES 4170504057006230701074607910      
NOTES 1: Boldface denotes maximum load for the symbol shown and the corresponding Load Index number shown.
2: For shipping purposes, tire inflation pressures may be increased to 30 psi (210 kPa). Inflation pressure must be adjusted to correct operating inflation before operations.
3: At higher transport speeds (above 20 mph) and lower pressures (less than 12 psi) increased inflation pressure may be required for vehicle stability.
4: When running lower inflation pressures, it is extremely important to use an accurate air pressure gauge.
5: The above loads are also applicable to equipment, including hillside combines, operating on slopes above 11° (20% grade). Load adjustments below 20 mph (30 km/h) in the adjoining table do not apply when operating on slopes greater than 11° (20% grade).
6: For hillside operations, earthmoving operations, and for moldboard plowing with single drive wheel tires in the furrow consult tire manufacturer for inflation pressure recommendations.
7: For cyclic loading field service, see Table F-1. For tire sizes not shown, see Note 3 on Table F-1.
8. For transport service and operations, which do not require sustained high torque, the table to the right applies.


MAX. SPEED

% CHANGE IN ABOVE

CHANGE IN INFL. PRESSURE

Statationary +189% +6 PSI (40kPa)
10 MPH / 15 KM/H +34% (except hillside combines) NONE
15 MPH / 25 KM/H +11% (except hillside combines) NONE
20 MPH / 30 KM/H +7% NONE
25 MPH / 40 KM/H NONE NONE
30 MPH / 50 KM/H NONE NONE
FOR RIM AND WHEEL LOAD INFORMATION, SEE IMPORTANT NOTES IN CHARTS I AND II IN GENERAL FARM TIRE INFORMATION