Part numbers for axle parts (not an inclusive list) Offset is the location of the wheel mounting surface in relation to the true center of the wheel.normally in mm.Ī 20x10 wheel with a 4.5" BackSpace will have approx -24 or -25mm offset.Ī 20x12 wheel with a 4.5" BackSpace will have approx -51mm offset. Rear calipers have twin 48 mm calipers on F-250 and twin 54 mm pistons on F-350 dual-rear-wheel models.Ġ5-07.18"and 20"(from the factory) have 5.80" BS, and the 17" have 5.50"Ġ0-04s came with 16s (unless it was a Harley Edition, they had 18s).they don't clear the calipers on the 05-08s.Ī 04 HD wheel would fit on a 05-08 since they were 18s, but they had less backspacing so they sit further out of the wheel wells on 05-08s.Ġ5-08s fit on the 99-04, just rub on the leaf springs and sit further under the truck than they do on the 05-08. The front calipers have twin 60 mm pistons - up 11 percent from 2004 - for better braking feel. Other improvements include larger calipers for both the F-250 and F-350. engineers to upsized brake rotors by 5 percent, to 347 mm in front and 340 mm in rear. The 05-08's have larger brakes so the backspacing is different than the 99-04's. 85 ft-lbĪll Superdutys 99-08 that are singe rear wheel models use the 8x170mm bolt pattern. 166 ft-lbīrakes, rear disc brake caliper anchor plate bolts (2). 27 ft-lbīrakes, front disc brake caliper anchor plate bolts (2). 42 ft-lbīrakes, disc, rear brake caliper pin bolts (2).
18 ft-lbīrakes, disc, front brake caliper pin bolts (2). 30-40 ft-lbĬast aluminum diff cover bolts. Radius arm to axle bolts, and bracket nut.
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