Ford F-250 Super Duty
2008–16 4x4

Factory gearing, tires, angles and brakes for the F-250 Super Duty, and what the usual upgrades do to it. Every number is from the maker's own figures unless the calculators say otherwise. A few figures here are still waiting on a factory document; the calculators mark them.

Use this truck in the calculators
156.2 in wheelbase · 37.6 in front · 52.4 in rear overhang
in
Stock tireLT245/75R1731.5 in tall
Axle ratio3.31–4.3Factory, by trim
Crawl ratio67.7:1Best trim: XL 4x4 (2008-10)
Angles30.3 · 15.9 · 17.4°Approach, breakover, departure
Clearance8.1 in7.8 to 8.1 in by trim
Highway mpg19Estimate, not EPA rated

Tire upgrades, worked out

XL 4x4 (2008-10), 3.73s, from LT245/75R17
TireHeightUnder the diffsSpeedo at 65RPM at 65Gears for dailyOpen
285/70R1732.7 in+0.6 in63 mph1,794Keep 3.73sOpen →
33x10.50R1733.0 in+0.8 in62 mph1,778Keep 3.73sOpen →
33x12.50R1733.0 in+0.8 in62 mph1,778Keep 3.73sOpen →
255/80R1733.1 in+0.8 in62 mph1,7753.91Open →
285/75R1733.8 in+1.2 in60 mph1,7344.1Open →
315/70R1734.4 in+1.4 in60 mph1,7084.1Open →
35x11.50R1735.0 in+1.8 in58 mph1,6764.1Open →
35x12.50R1735.0 in+1.8 in58 mph1,6764.1Open →
37x11.50R1737.0 in+2.8 in55 mph1,5864.3Open →
37x12.50R1737.0 in+2.8 in55 mph1,5864.3Open →

Stock turns 1,865 rpm at 65 in top gear. Flotation sizes are nominal; most measure a little short mounted.

Trims

6 we have figures for
TrimTireTransmissionAxleAnglesClearanceOpen
XL 4x4 (2008-10)LT245/75R176-speed manual, 5-speed automatic3.73 / 4.1 / 4.330.3 · 15.9 · 17.47.8 inUse →
XLT 4x4 (2008-10)LT265/70R176-speed manual, 5-speed automatic3.73 / 4.1 / 4.330.3 · 15.9 · 17.47.8 inUse →
FX4/Lariat 4x4 (2008-10)LT275/70R186-speed manual, 5-speed automatic3.73 / 4.1 / 4.330.3 · 15.9 · 17.47.8 inUse →
XL 4x4 (2011-16)LT245/75R176-speed automatic3.31 / 3.55 / 3.73 / 4.320 · 18.1 · 188.1 inUse →
XLT/Lariat/FX4 4x4 (2011-16)LT275/70R186-speed automatic3.31 / 3.55 / 3.73 / 4.320 · 18.1 · 188.1 inUse →
KR/Platinum/Lariat 4x4 (20 in)LT275/65R205-speed automatic, 6-speed automatic3.31 / 3.55 / 3.73 / 4.320 · 18.1 · 188.1 inUse →

Size

Wheelbase
156.2 in
Front overhang
37.6 in to 38.1 in
Rear overhang
52.4 in
Height
80 in
Body
Pickup
Stock tires
LT245/75R17, LT265/70R17, LT275/65R20, LT275/70R18

Transmissions and low range

6-speed manual (ZF S6-650)
5.79 · 3.3 · 2.1 · 1.31 · 1 · 0.72
5-speed automatic (5R110W TorqShift)
3.11 · 2.2 · 1.54 · 1 · 0.71
6-speed automatic (6R140 TorqShift)
3.97 · 2.32 · 1.52 · 1.15 · 0.86 · 0.67
Low range, np271
2.72:1

Axles

Front
Dana 60 solid front (coil springs)
Rear
Sterling 10.5-in full-floating
3.31 ratio
XL 4x4 (2011-16), XLT/Lariat/FX4 4x4 (2011-16), KR/Platinum/Lariat 4x4 (20 in)
3.55 ratio
XL 4x4 (2011-16), XLT/Lariat/FX4 4x4 (2011-16), KR/Platinum/Lariat 4x4 (20 in)
3.73 ratio
XL 4x4 (2008-10), XLT 4x4 (2008-10), FX4/Lariat 4x4 (2008-10), XL 4x4 (2011-16), XLT/Lariat/FX4 4x4 (2011-16), KR/Platinum/Lariat 4x4 (20 in)
4.1 ratio
XL 4x4 (2008-10), XLT 4x4 (2008-10), FX4/Lariat 4x4 (2008-10)
4.3 ratio
XL 4x4 (2008-10), XLT 4x4 (2008-10), FX4/Lariat 4x4 (2008-10), XL 4x4 (2011-16), XLT/Lariat/FX4 4x4 (2011-16), KR/Platinum/Lariat 4x4 (20 in)

Brakes

Front rotor
13.66 in, 347 mm
Front caliper piston
59.9 mm
Rear rotor
13.39 in, 340 mm
Rear
disc (ventilated)

Suspension

Front
solid axle, radius arms with track bar, coil springs
Rear
leaf springs, solid axle
Rear layout
Leaf springs

Fuel economy

Highway, not EPA rated
about 19 mpg
Where it comes from
Road test, steady 70 mph (pump-to-pump (2011 F-250 Super Duty Crew Cab 4x4 Lariat, 6.7 Power Stroke, 6R140)

Aftermarket bumpers

17 listed

Makers almost never publish angles, bottom heights or how far a bumper tucks, so these fill in as owners measure them. Measured yours? Add it on the rig page and every owner of this F-250 Super Duty sees how it does on their tires and lift.