The 2018 Ford F-250 Super Duty tire size depends on trim: the King Ranch, 6.2L Eng VIN 6, 4WD takes LT275/65R18 E 123/12; the King Ranch, 6.2L Eng VIN 6, RWD takes LT275/65R18 E 123/12; the King Ranch, 6.7L Eng VIN T, 4WD takes LT275/65R18 E 123/12; the King Ranch, 6.7L Eng VIN T, RWD takes LT275/65R18 E 123/12; the Lariat, 4D Pickup Crew Cab, 6.2L Eng VIN 6, 4WD takes LT275/65R18 E 123/12; the Lariat, 4D Pickup Crew Cab, 6.2L Eng VIN 6, RWD takes LT275/65R18 E 123/12; the Lariat, 4D Pickup Crew Cab, 6.7L Eng VIN T, 4WD takes LT275/65R18 E 123/12; the Lariat, 4D Pickup Crew Cab, 6.7L Eng VIN T, RWD takes LT275/65R18 E 123/12; the Lariat, 4D Pickup Extra Cab, 6.2L Eng VIN 6, 4WD takes LT275/65R18 E 123/12; the Lariat, 4D Pickup Extra Cab, 6.2L Eng VIN 6, RWD takes LT275/65R18 E 123/12; the Lariat, 4D Pickup Extra Cab, 6.7L Eng VIN T, 4WD takes LT275/65R18 E 123/12; the Lariat, 4D Pickup Extra Cab, 6.7L Eng VIN T, RWD takes LT275/65R18 E 123/12; the Limited takes LT275/65R20 E 126/12; the Platinum, 6.2L Eng VIN 6 takes LT275/65R20 E 126/12; the Platinum, 6.7L Eng VIN T takes LT275/65R20 E 126/12; the XL, 2D Pickup, 6.2L Eng VIN 6, 4WD takes LT245/75R17 E 121/11; the XL, 2D Pickup, 6.7L Eng VIN T, 4WD takes LT245/75R17 E 121/11; the XL, 2D Pickup, 6.2L Eng VIN 6, RWD takes LT245/75R17 E 121/11; the XL, 4D Pickup Crew Cab, 6.2L Eng VIN 6, RWD takes LT245/75R17 E 121/11; the XL, 2D Pickup, 6.7L Eng VIN T, RWD takes LT245/75R17 E 121/11; the XL, 4D Pickup Crew Cab, 6.2L Eng VIN 6, 4WD takes LT245/75R17 E 121/11; the XL, 4D Pickup Crew Cab, 6.7L Eng VIN T, 4WD takes LT245/75R17 E 121/11; the XL, 4D Pickup Crew Cab, 6.7L Eng VIN T, RWD takes LT245/75R17 E 121/11; the XL, 4D Pickup Extra Cab, 6.2L Eng VIN 6, 4WD takes LT245/75R17 E 121/11; the XL, 4D Pickup Extra Cab, 6.2L Eng VIN 6, RWD takes LT245/75R17 E 121/11; the XL, 4D Pickup Extra Cab, 6.7L Eng VIN T, 4WD takes LT245/75R17 E 121/11; the XL, 4D Pickup Extra Cab, 6.7L Eng VIN T, RWD takes LT245/75R17 E 121/11; the XLT, 2D Pickup, 6.2L Eng VIN 6, 4WD takes LT245/75R17 E 121/11; the XLT, 2D Pickup, 6.2L Eng VIN 6, RWD takes LT245/75R17 E 121/11; the XLT, 2D Pickup, 6.7L Eng VIN T, 4WD takes LT245/75R17 E 121/11; the XLT, 4D Pickup Crew Cab, 6.2L Eng VIN 6, 4WD takes LT245/75R17 E 121/11; the XLT, 4D Pickup Crew Cab, 6.2L Eng VIN 6, RWD takes LT245/75R17 E 121/11; the XLT, 2D Pickup, 6.7L Eng VIN T, RWD takes LT245/75R17 E 121/11; the XLT, 4D Pickup Crew Cab, 6.7L Eng VIN T, 4WD takes LT245/75R17 E 121/11; the XLT, 4D Pickup Crew Cab, 6.7L Eng VIN T, RWD takes LT245/75R17 E 121/11; the XLT, 4D Pickup Extra Cab, 6.2L Eng VIN 6, 4WD takes LT245/75R17 E 121/11; the XLT, 4D Pickup Extra Cab, 6.7L Eng VIN T, RWD takes LT245/75R17 E 121/11; the XLT, 4D Pickup Extra Cab, 6.7L Eng VIN T, 4WD takes LT245/75R17 E 121/11; the XLT, 4D Pickup Extra Cab, 6.2L Eng VIN 6, RWD takes LT245/75R17 E 121/11, per the factory service manual.
Factory-Spec Tire Size
Varies by trim
King Ranch, 6.2L Eng VIN 6, 4WD: LT275/65R18 E 123/12
King Ranch, 6.2L Eng VIN 6, RWD: LT275/65R18 E 123/12
King Ranch, 6.7L Eng VIN T, 4WD: LT275/65R18 E 123/12
King Ranch, 6.7L Eng VIN T, RWD: LT275/65R18 E 123/12
Lariat, 4D Pickup Crew Cab, 6.2L Eng VIN 6, 4WD: LT275/65R18 E 123/12
Lariat, 4D Pickup Crew Cab, 6.2L Eng VIN 6, RWD: LT275/65R18 E 123/12
Lariat, 4D Pickup Crew Cab, 6.7L Eng VIN T, 4WD: LT275/65R18 E 123/12
Lariat, 4D Pickup Crew Cab, 6.7L Eng VIN T, RWD: LT275/65R18 E 123/12
Lariat, 4D Pickup Extra Cab, 6.2L Eng VIN 6, 4WD: LT275/65R18 E 123/12
Lariat, 4D Pickup Extra Cab, 6.2L Eng VIN 6, RWD: LT275/65R18 E 123/12
Lariat, 4D Pickup Extra Cab, 6.7L Eng VIN T, 4WD: LT275/65R18 E 123/12
Lariat, 4D Pickup Extra Cab, 6.7L Eng VIN T, RWD: LT275/65R18 E 123/12
Limited: LT275/65R20 E 126/12
Platinum, 6.2L Eng VIN 6: LT275/65R20 E 126/12
Platinum, 6.7L Eng VIN T: LT275/65R20 E 126/12
XL, 2D Pickup, 6.2L Eng VIN 6, 4WD: LT245/75R17 E 121/11
XL, 2D Pickup, 6.7L Eng VIN T, 4WD: LT245/75R17 E 121/11
XL, 2D Pickup, 6.2L Eng VIN 6, RWD: LT245/75R17 E 121/11
XL, 4D Pickup Crew Cab, 6.2L Eng VIN 6, RWD: LT245/75R17 E 121/11
XL, 2D Pickup, 6.7L Eng VIN T, RWD: LT245/75R17 E 121/11
XL, 4D Pickup Crew Cab, 6.2L Eng VIN 6, 4WD: LT245/75R17 E 121/11
XL, 4D Pickup Crew Cab, 6.7L Eng VIN T, 4WD: LT245/75R17 E 121/11
XL, 4D Pickup Crew Cab, 6.7L Eng VIN T, RWD: LT245/75R17 E 121/11
XL, 4D Pickup Extra Cab, 6.2L Eng VIN 6, 4WD: LT245/75R17 E 121/11
XL, 4D Pickup Extra Cab, 6.2L Eng VIN 6, RWD: LT245/75R17 E 121/11
XL, 4D Pickup Extra Cab, 6.7L Eng VIN T, 4WD: LT245/75R17 E 121/11
XL, 4D Pickup Extra Cab, 6.7L Eng VIN T, RWD: LT245/75R17 E 121/11
XLT, 2D Pickup, 6.2L Eng VIN 6, 4WD: LT245/75R17 E 121/11
XLT, 2D Pickup, 6.2L Eng VIN 6, RWD: LT245/75R17 E 121/11
XLT, 2D Pickup, 6.7L Eng VIN T, 4WD: LT245/75R17 E 121/11
XLT, 4D Pickup Crew Cab, 6.2L Eng VIN 6, 4WD: LT245/75R17 E 121/11
XLT, 4D Pickup Crew Cab, 6.2L Eng VIN 6, RWD: LT245/75R17 E 121/11
XLT, 2D Pickup, 6.7L Eng VIN T, RWD: LT245/75R17 E 121/11
XLT, 4D Pickup Crew Cab, 6.7L Eng VIN T, 4WD: LT245/75R17 E 121/11
XLT, 4D Pickup Crew Cab, 6.7L Eng VIN T, RWD: LT245/75R17 E 121/11
XLT, 4D Pickup Extra Cab, 6.2L Eng VIN 6, 4WD: LT245/75R17 E 121/11
XLT, 4D Pickup Extra Cab, 6.7L Eng VIN T, RWD: LT245/75R17 E 121/11
XLT, 4D Pickup Extra Cab, 6.7L Eng VIN T, 4WD: LT245/75R17 E 121/11
XLT, 4D Pickup Extra Cab, 6.2L Eng VIN 6, RWD: LT245/75R17 E 121/11
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