2024 FORD F650/750 wheel size

PRINCIPLE OF OPERATION -
VEHICLES WITH: HYDRAULIC
BRAKES
WARNING: Vehicle modificationsinvolving braking system, aftermarketroof racks, suspension, steering system,tire construction and wheel and tire sizemay change the handling characteristicsof your vehicle and may adversely affectthe performance of the electronicstability control system. In addition,installing any stereo loudspeakers mayinterfere with and adversely affect theelectronic stability control system. Installany aftermarket stereo loudspeaker asfar as possible from the front centerconsole, the tunnel, and the front seatsin order to minimize the risk of interferingwith the electronic stability controlsensors. Reducing the effectiveness ofthe electronic stability control systemcould lead to an increased risk of loss ofvehicle control, vehicle rollover, personalinjury and death.
WARNING: Remember that evenadvanced technology cannot defy thelaws of physics. It's always possible tolose control of a vehicle due toinappropriate driver input for theconditions. Aggressive driving on anyroad condition can cause you to losecontrol of your vehicle increasing the riskof personal injury or property damage.Activation of the electronic stabilitycontrol system is an indication that atleast some of the tires have exceededtheir ability to grip the road; this could
reduce the operator's ability to controlthe vehicle potentially resulting in a lossof vehicle control, vehicle rollover,personal injury and death. If yourelectronic stability control systemactivates, SLOW DOWN.
The system turns on each time you switchthe ignition on.
If a fault occurs in either the stabilitycontrol or the traction control system, thefollowing conditions are possible:
•The stability and traction control lightilluminate.
•The stability control and tractioncontrol systems are not maintainingtraction of the wheels.
If a driving condition activates either thestability control or the traction controlsystem, the following conditions arepossible:
•The stability and traction control lightflash.
•Your vehicle slows down.
•The system reduces engine power.
•A vibration in the brake pedal.
•The brake pedal is stiffer than usual.
•If the driving condition is severe andyour foot is not on the brake, the brakepedal could move as the systemapplies higher brake force.
The stability control system has severalfeatures built into it to help you maintaincontrol of your vehicle:
Electronic Stability Control
The system assists in preventing skids orlateral slides by applying the brakes to oneor more of the wheels individually and, ifnecessary, decreases engine power.
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Traction Control
The system helps maintain traction of thewheels by detecting and controlling wheelspin. See Using Traction Control (page151).
Vehicle without stability controlskidding off its intended route.A
Vehicle with stability controlmaintaining control on a slipperysurface.
B
PRINCIPLE OF OPERATION -
VEHICLES WITH: AIR BRAKES
WARNING: Vehicle modificationsinvolving braking system, aftermarketroof racks, suspension, steering system,tire construction and wheel and tire sizemay change the handling characteristicsof your vehicle and may adversely affectthe performance of the electronicstability control system. In addition,installing any stereo loudspeakers may
interfere with and adversely affect theelectronic stability control system. Installany aftermarket stereo loudspeaker asfar as possible from the front centerconsole, the tunnel, and the front seatsin order to minimize the risk of interferingwith the electronic stability controlsensors. Reducing the effectiveness ofthe electronic stability control systemcould lead to an increased risk of loss ofvehicle control, vehicle rollover, personalinjury and death.
WARNING: Remember that evenadvanced technology cannot defy thelaws of physics. It's always possible tolose control of a vehicle due toinappropriate driver input for theconditions. Aggressive driving on anyroad condition can cause you to losecontrol of your vehicle increasing the riskof personal injury or property damage.Activation of the electronic stabilitycontrol system is an indication that atleast some of the tires have exceededtheir ability to grip the road; this couldreduce the operator's ability to controlthe vehicle potentially resulting in a lossof vehicle control, vehicle rollover,personal injury and death. If yourelectronic stability control systemactivates, SLOW DOWN.
The system automatically turns on eachtime you switch the ignition on.
If a fault occurs in either the stabilitycontrol or the traction control system, youmay experience the following conditions:
•The stability and traction control lightilluminates steadily.
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ECONOMICAL DRIVING
Your fuel economy is affected by severalthings, such as how you drive, theconditions you drive under, and how youmaintain your vehicle.
You may improve your fuel economy bykeeping these things in mind:
•Accelerate and slow down in a smooth,moderate fashion.
•Drive at steady speeds withoutstopping.
•Anticipate stops; slowing down mayeliminate the need to stop.
•Close the windows for high-speeddriving.
•Drive at reasonable speeds. Travelingat 55 mph (90 km/h) uses 15% lessfuel than traveling at 65 mph(105 km/h).
•Keep the tires properly inflated and useonly the recommended size.
•Use the recommended engine oil.
•Perform all regularly scheduledmaintenance.
Avoid these actions; they reduce your fueleconomy:
•Sudden accelerations or hardaccelerations.
•Warm up your vehicle on coldmornings.
•Use the air conditioner.
•Use the speed control in hilly terrain.
•Rest your foot on the brake pedal whiledriving.
•Carry unnecessary weight.Approximately 1 mpg [0.4 km/L] is lostfor every 400 lb (180 kg) of weightcarried.
•Driving with the wheels out ofalignment.
Conditions
•Adding certain accessories to yourvehicle may reduce fuel economy. Forexample bug deflectors, rollbars, lightbars, running boards, ski racks orluggage racks.
•Using fuel blended with alcohol maylower fuel economy.
•Fuel economy may decrease with lowertemperatures during the first 5–10 mi(12–16 km) of driving.
•Driving on flat terrain offers improvedfuel economy as compared to drivingon hilly terrain.
•Transmissions give their best fueleconomy when operated in the topcruise gear and with steady pressureon the gas pedal.
COLD WEATHER
PRECAUTIONS - 6.7L DIESEL
Winter Grille Cover (If Equipped)
The winter grille cover enhances heaterperformance and will reduce the amountof time it takes to warm the inside of yourvehicle in extremely cold conditions below-0.4°F (-18°C).
The winter grille cover installs over theoutside of the front grille and restricts theair flowing to the engine compartment bycovering the radiator grille openings.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingDriving Hints

AXLE INSPECTION
Front Axle
Maintaining the front axle alignment tospecifications is very important. A qualifiedtechnician should check and maintain thealignment.
Regular inspections should include:
•Toe-in inspection and adjustment (ifnecessary), particularly with radialtires.
•Checking for proper tightness of axlemounting U-bolt nuts, attaching ormounting bolts and nuts.
•Checking the axle for damage, binding,worn parts and adequate lubrication.
•Checking the kingpins for excessivewear. Also, perform this check duringother scheduled maintenance, forexample as tire rotation or service,wheel bearing service and alignment.See the workshop manual for properprocedures.
Toe-in
It is essential to maintain correct toe-inand tire pressure for optimum tire wear.
Inspecting steer axle tires in the first3,000–10,000 mi (5,000–16,000 km)generally shows if tires are wearingnormally.
Rapid outside shoulder wear on both tiresindicates too much toe-in.
Rapid inside shoulder wear on both tiresindicates too much toe-out.
In P&D-type service, there can be aleft-to-right steer tire tread life differentialup to 40% depending on routes and othervariables.
Follow the tire manufacturer'srecommended cold inflation pressure forthe tire size, load range (ply rating) andsteer axle loading typical for their operation(each steer axle tire equals ½ steer axleloading).
Special applications may warrant a settingbased on experience with the type of tireoperating loads and conditions. Radial tiresare more sensitive to toe-in setting thanbias ply tires. Fine tuning school busalignment to line-haul truck standardsdoes not drastically improve tire tread life.
STEERING SYSTEM
INSPECTION
WARNING: Failure to maintain thesteering system in proper condition cancause reduced steering ability resultingin property damage, personal injury ordeath.
Note:Have any steering problemsimmediately corrected by a qualified servicetechnician.
Ask your service technician to examine thesteering mechanism. Only minoradjustments may be necessary.
Regular inspections should include:
•Checking the tie rod, drag link endclamp bolts and ball joints for propertightness.
•Checking for installation and spread ofcotter pins and tightness of nuts atboth ends of the tie rod and drag link.
•Checking that the pitman arm (steeringarm at steering gear) mounting is tightand locked. Check system for leaks orhose chafing. Repair immediately, ifnecessary.
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TIRE CARE
Glossary of Tire Terminology
*Tire label: A label showing theoriginal equipment tire sizes,recommended inflation pressureand the maximum weight thevehicle can carry.
*Tire Identification Number: Anumber on the sidewall of eachtire providing information aboutthe tire brand and manufacturingplant, tire size and date ofmanufacture. Also referred to asDOT code.
*Inflation pressure: A measureof the amount of air in a tire.
*Standard load: A class ofP-metric or Metric tires designedto carry a maximum load at setpressure. For example: ForP-metric tires 35 psi (241 kPa) andfor Metric tires 36 psi (248 kPa).Increasing the inflation pressurebeyond this pressure does notincrease the tire’s load carryingcapability.
*Extra load: A class of P-metricor Metric tires designed to carry aheavier maximum load at 42 psi(290 kPa). Increasing the inflationpressure beyond this pressuredoes not increase the tire’s loadcarrying capability.
*kPa: Kilopascal, a metric unit ofair pressure.
*PSI: Pounds per square inch, astandard unit of air pressure.
*Cold tire pressure: The tirepressure when the vehicle hasbeen stationary and out of directsunlight for an hour or more andprior to the vehicle being driven for1 mi (1.6 km).
*Recommended inflationpressure: The cold inflationpressure is found on the SafetyCompliance Certification Label,located in the driver's door jam.
*Bead area of the tire: Area ofthe tire next to the rim.
*Sidewall of the tire: Areabetween the bead area and thetread.
*Tread area of the tire: Area ofthe perimeter of the tire thatcontacts the road when mountedon the vehicle.
*Rim: The metal support (wheel)for a tire or a tire and tubeassembly upon which the tirebeads are seated.
Information Contained on theTire Sidewall
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.
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Information on P Type Tires
P215/65R15 95H is an example of
a tire size, load index and speedrating. The definitions of theseitems are listed below. (Note thatthe tire size, load index and speedrating for your vehicle may bedifferent from this example.)
A.P: Indicates a tire, designatedby the Tire and Rim Association,that may be used for service oncars, sport utility vehicles,minivans and light trucks.Note: Ifyour tire size does not begin witha letter this may mean it isdesignated by either the EuropeanTire and Rim TechnicalOrganization or the Japan TireManufacturing Association.
B.215: Indicates the nominalwidth of the tire in millimetersfrom sidewall edge to sidewalledge. In general, the larger thenumber, the wider the tire.
C.65: Indicates the aspect ratiowhich gives the tire's ratio ofheight to width.
D.R: Indicates a radial type tire.
E.15: Indicates the wheel or rimdiameter in inches. If you changeyour wheel size, you have topurchase new tires to match thenew wheel diameter.
F.95: Indicates the tire's loadindex. It is an index that relates tohow much weight a tire can carry.
Note:You may not find thisinformation on all tires because itis not required by federal law.
G.H: Indicates the tire's speedrating. The speed rating denotesthe speed at which a tire isdesigned to be driven for extendedperiods of time under a standardcondition of load and inflationpressure. The tires on your vehiclemay operate at differentconditions for load and inflationpressure. These speed ratings mayneed to be adjusted for thedifference in conditions. Theratings range from 81–186 mph(130–299 km/h). These ratingsare listed in the following chart.
Note:You may not find thisinformation on all tires because it
is not required by federal law.
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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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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingWheels and TiresABCDEE142545