2024 FORD F650/750 tire size

Speed RatingLetterRating
75 mph (120 km/h)L
81 mph (130 km/h)M
87 mph (140 km/h)N
99 mph (159 km/h)Q
106 mph (171 km/h)R
112 mph (180 km/h)S
118 mph (190 km/h)T
124 mph (200 km/h)U
130 mph (210 km/h)H
149 mph (240 km/h)V
168 mph (270 km/h)W
186 mph (299 km/h)Y
Note:For tires with a maximum
speed capability over 149 mph
(240 km/h), tire manufacturers
sometimes use the letters ZR. For
those with a maximum speed
capability over 186 mph (299
km/h), tire manufacturers always
use the letters ZR.
H.U.S. DOT Tire IdentificationNumber: This begins with theletters DOT and indicates that thetire meets all federal standards.The next two numbers or lettersare the plant code designatingwhere it was manufactured, the
next two are the tire size code andthe last four numbers represent
the week and year the tire wasbuilt. For example, the numbers317 mean the 31st week of 1997.After 2000 the numbers go to fourdigits. For example, 2501 meansthe 25th week of 2001. Thenumbers in between areidentification codes used fortraceability. This information isused to contact customers if a tiredefect requires a recall.
I.M+S or M/S: Mud and Snow, or
AT: All Terrain, or
AS: All Season.
J.Tire Ply Composition andMaterial Used: Indicates thenumber of plies or the number oflayers of rubber-coated fabric inthe tire tread and sidewall. Tiremanufacturers also must indicatethe ply materials in the tire and thesidewall, which include steel,nylon, polyester, and others.
K.Maximum Load: Indicates themaximum load in kilograms andpounds that can be carried by thetire.
L.Treadwear, Traction andTemperature Grades:
*Treadwear The treadwear gradeis a comparative rating based onthe wear rate of the tire whentested under controlled conditionson a specified government testcourse. For example, a tire graded150 would wear 1½ times as wellon the government course as a tire
graded 100.
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C.Maximum Load Dual lb (kg)at psi (kPa) cold: Indicates themaximum load and tire pressurewhen the tire is used as a dual;defined as four tires on the rearaxle (a total of six or more tires onthe vehicle).
D.Maximum Load Single lb(kg) at psi (kPa) cold: Indicatesthe maximum load and tirepressure when the tire is used asa single; defined as two tires(total) on the rear axle.
Information on T Type Tires
T145/80D16 is an example of atire size.
Note:The temporary tire size foryour vehicle may be different fromthis example. Tire Quality Grades
do not apply to this type of tire.
T type tires have some additionalinformation beyond those of Ptype tires; these differences aredescribed below:
A.T: Indicates a type of tire,designated by the Tire and RimAssociation, that is intended fortemporary service on cars, sportutility vehicles, minivans and lighttrucks.
B.145: Indicates the nominalwidth of the tire in millimetersfrom sidewall edge to sidewalledge. In general, the larger thenumber, the wider the tire.
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C.80: Indicates the aspect ratiowhich gives the tire's ratio ofheight to width. Numbers of 70 orlower indicate a short sidewall.
D.D: Indicates a diagonal type tire.
R: Indicates a radial type tire.
E.16: Indicates the wheel or rimdiameter in inches. If you changeyour wheel size, you have topurchase new tires to match thenew wheel diameter.
Inflating Your Tires
Safe operation of your vehiclerequires that your tires areproperly inflated. Remember thata tire can lose up to half of its airpressure without appearing flat.
Every day before you drive, check
your tires. If one looks lower thanthe others, use a tire gauge tocheck pressure of all tires andadjust if required.
At least once a month and beforelong trips, inspect each tire andcheck the tire pressure with a tiregauge (including spare, ifequipped). Inflate all tires to theinflation pressure recommendedby Ford Motor Company.
You are strongly urged to buy areliable tire pressure gauge, asautomatic service station gaugesmay be inaccurate. Fordrecommends the use of a digitalor dial-type tire pressure gaugerather than a stick-type tirepressure gauge.
Use the recommended coldinflation pressure for optimum tireperformance and wear.Under-inflation or over-inflationmay cause uneven treadwearpatterns
WARNING: Under-inflationis the most common cause oftire failures and may result insevere tire cracking, treadseparation or blowout, withunexpected loss of vehiclecontrol and increased risk ofinjury. Under-inflation increasessidewall flexing and rollingresistance, resulting in heatbuildup and internal damage tothe tire. It also may result inunnecessary tire stress, irregularwear, loss of vehicle control andaccidents. A tire can lose up tohalf of its air pressure and notappear to be flat!
Always inflate your tires to theFord recommended inflationpressure even if it is less than themaximum inflation pressureinformation found on the tire. TheFord recommended tire inflationpressure is found on the SafetyCompliance Certification Label orTire Label. Failure to follow the tirepressure recommendations cancause uneven treadwear patternsand adversely affect the way yourvehicle handles.
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Note:Some spare tires operate ata higher inflation pressure than theother tires. For T type mini-sparetires, see the Dissimilar spare wheeland tire assembly information fora description. Store and maintainat 60 psi (412 kPa). For full-sizeand dissimilar spare tires, see theDissimilar spare wheel and tireassembly information for adescription. Store and maintain atthe higher of the front and rearinflation pressure as shown on theSafety Compliance CertificationLabel or Tire Label.
6.Visually inspect the tires tomake sure there are no nails orother objects embedded thatcould poke a hole in the tireand cause an air leak.
7.Check the sidewalls to makesure there are no gouges, cutsor bulges.
Checking Pressure when tiresare hot:
If pressures are checked after tireshave been driven for more thanthree minutes or more than 1 mile,(2 km) the tires become hot andthe pressures will increase byapproximately 4 psi (27.6 kPa).Therefore when the tire pressureis adjusted under these conditions,it should be increased to a gaugereading of 4 psi (27.6 kPa) greaterthan the recommended coldinflation pressure.
For Example Only
33 psi (230kPa)Gauge readingof hot tire
32 psi (220kPa)If recom-mended, coldinflation pres-sure is
The hot tire pressure is only 1 psi(10 kPa) greater than therecommended cold inflationpressure. Therefore, add 3 psi(20 kPa) more to increase thehot pressure to 4 psi (30 kPa)over the recommended coldinflation pressure.
36 psi (250kPa)New hot pres-sure
Tire Inflation Information
WARNING: An inflated tireand rim can be very dangerousif improperly used, serviced ormaintained. To reduce the riskof serious injury, never attemptto re-inflate a tire which hasbeen run flat or seriouslyunder-inflated without firstremoving the tire from the wheelassembly for inspection. Do notattempt to add air to tires orreplace tires or wheels withoutfirst taking precautions toprotect persons and property.
All tires with Steel Carcass Plies(if equipped):
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U.S. DOT Tire IdentificationNumber
Both United States and CanadaFederal regulations require tiremanufacturers to placestandardized information on thesidewall of all tires. Thisinformation identifies anddescribes the fundamentalcharacteristics of the tire and alsoprovides a U.S. DOT TireIdentification Number for safetystandard certification and in caseof a recall.
This begins with the letters DOTand indicates that the tire meetsall federal standards. The nexttwo numbers or letters are theplant code designating where itwas manufactured, the next twoare the tire size code and the lastfour numbers represent the weekand year the tire was built. Forexample, the numbers 317 meanthe 31st week of 1997. After 2000the numbers go to four digits. Forexample, 2501 means the 25thweek of 2001. The numbers inbetween are identification codesused for traceability. Thisinformation is used to contactcustomers if a tire defect requiresa recall.
Tire ReplacementRequirements
Your vehicle is equipped with tiresdesigned to provide a safe rideand handling capability.
WARNING: Only usereplacement tires and wheelsthat are the same size, loadindex, speed rating, and type asthose originally provided for yourvehicle. The recommended tireand wheel sizes can be found onthe Tire Label on the driver sidedoor frame or the edge of thedriver door. If this information isnot found in those locations, orfor additional options, contactyour authorized dealer. Use ofany tire or wheel notrecommended, could affect thesafety and performance of yourvehicle, which could result in anincreased risk of loss of vehiclecontrol, vehicle rollover, personalinjury and death.
WARNING: To reduce therisk of serious injury, whenmounting replacement tires andwheels, you should not exceedthe maximum pressure indicatedon the sidewall of the tire to setthe beads without additionalprecautions listed below. If thebeads do not seat at themaximum pressure indicated,re-lubricate and try again.
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following the US TireManufacturers Association(USTMA) recommended repairprocedures. Plug-only repairsdone on-the-wheel are consideredimproper and therefore, notrecommended. Such repairs arenot reliable and may cause furtherdamage to the tire.
STORAGE
Tires contain waxes andemollients to protect their outersurfaces from ozone and weatherchecking. As the tire rolls andflexes, the waxes and emollientscontinually migrate to the surface,replenishing this protectionthroughout the normal use of thetire. Consequently, when tires situnused for long periods of time (a
month or more) their surfacesbecome dry and more susceptibleto ozone and weather checkingand the casing becomessusceptible to flat spotting.Forthis reason, tires should alwaysbe stored in a cool, dry, clean,indoor environment. If storageis for one month or more,eliminate the weight from thetires by raising the vehicle or byremoving the tires from thevehicle. Failure to store tires inaccordance with theseinstructions could result indamage to your tires orpremature aging of the tiresand sudden tire failure.
When tires are stored, be sure theyare placed away from sources ofheat and ozone such as directsunlight, hot pipes and electricgenerators. Be sure that surfaceson which tires are stored are cleanand free from grease, gasoline orother substances, which coulddeteriorate the rubber. Failure tostore tires in accordance withthese instructions could result indamage to your tires or prematureaging of the tires and sudden tirefailure.
FOLLOW THESE MOUNTINGRECOMMENDATIONS
Tire changing can be dangerousand must be done byprofessionally trained personsusing proper tools and
procedures as specified by theUS Tire ManufacturersAssociation (USTMA). Singleor dual assemblies must becompletely deflated beforedemounting.
Your tires should be mounted onwheels of correct size and typeand which are in good, cleancondition. Wheels that are bent,chipped, rusted (steel wheels) orcorroded (alloy wheels) maycause tire damage. The inside ofthe tire must be free from foreignmaterial. Have your retailer checkthe wheels before mounting newtires. Mismatched tires and rimscan explode during mounting.Also, mismatched tires and rimscan result in dangerous tire failure
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on the road. If a tire is mounted byerror on the wrong-sized rim, donot remount it on the proper rim -scrap it. It may have beendamaged internally (which is notexternally visible) by having beendangerously stretched and couldfail on the highway.
Old valves may leak. When newtubeless tires are mounted,have new valves of the correcttype installed. Tubeless tiresmust only be mounted onwheels designed for tubelesstires i.e., wheels which havesafety humps or ledges.
It is recommended that you haveyour tires and wheels balanced.Tires and wheels, which are notbalanced, may cause steeringdifficulties, a bumpy ride, andirregular tire wear.
Be sure that all your valveshave suitable valve caps. Thevalve cap is the primary sealagainst air loss.
TEMPORARY SPARE TIRES
When using any temporary sparetire, be sure to follow the vehiclemanufacturer’s instructions.
REMEMBER... TO AVOIDDAMAGE TO YOUR TIRES ANDPOSSIBLE ACCIDENT:
•CHECK TIRE PRESSURE ATLEAST ONCE EACH MONTHWHEN TIRES ARE COLD ANDBEFORE LONG TRIPS.
•DO NOTUNDERINFLATE/OVERINFLATE.
•DO NOT OVERLOAD.
•DRIVE AT MODERATESPEEDS, OBSERVE LEGALLIMITS.
•AVOID DRIVING OVERPOTHOLES, OBSTACLES,CURBS OR EDGES OFPAVEMENT.
•AVOID EXCESSIVE WHEELSPINNING.
•IF YOU SEE ANY DAMAGE TOA TIRE, REPLACE WITH THESPARE AND VISIT ANYAUTHORIZED RETAILER ATONCE.
•IF YOU HAVE ANYQUESTIONS, CONTACT YOURAUTHORIZED RETAILER.
Driving habits have a great dealto do with your tire mileage andsafety.
•Observe posted speed limits
•Avoid fast starts, stops andturns
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Note:Your vehicle may beequipped with a dissimilar sparewheel and tire assembly. Adissimilar spare wheel and tireassembly is defined as a sparewheel and tire assembly that isdifferent in brand, size orappearance from the road tires andwheels. If you have a dissimilarspare wheel and tire assembly it isintended for temporary use onlyand should not be used in a tirerotation.
Rotating your tires at therecommended interval helps yourtires wear more evenly, providingbetter tire performance and longertire life.
Rear-wheel drive vehicles
Dual rear wheel vehicles (sixtire rotation)
Note:For vehicles with directionaltires marked by an arrow on the tiresidewall, tire rotation is notrecommended.
If your vehicle is equipped withdual rear wheels it isrecommended that the front andrear tires (in pairs) be rotated onlyside to side. We do notrecommend splitting up the dualrear wheels. Rotate them side toside as a set. After tire rotation,inflation pressures must beadjusted for the tires newpositions in accordance withvehicle requirements.
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