ReadyLift 3.5" SST Lift Kit (69-2735) for 17-21 Ford F-250/F-350 Super Duty 4WD (1-Piece Drive Shaft)

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ReadyLIFT Suspension has engineered a 3.5" lift kit made to fit the 2017-2021 Ford F250/F350 SuperDuty 4WD trucks with a one-piece drive shaft. These new 3.5" lift kits allow for wheel and tire combinations up to 37" while keeping the smooth OEM ride and drivability. This is a complete lift kit includes 4" OEM-equivalent rear blocks with integrated bump stop landings, 3.5" coil spring extensions with sound isolators, an OEM-style panhard drop bracket, front bump stops OEM shock extension brackets, a pair of radius arm drop brackets, and all needed hardware. When used with the maximum size tires, the F250 truck body is raised over 6". ReadyLIFT Smart Suspension Technology is used to make this kit very user-friendly to install, requiring no cutting or drilling. Like all other ReadyLIFT kits, the F250/F350 3.5" SST Lift Kit is guaranteed for life against manufacturing defects.

Popular wheel and tire sizes used for this vehicle include the stock rims (17x8, 6.5" backspacing) with 37x12.5 tires, 20x9.5 rims (+25" backspacing) with 37x12.5 tires, and 22x9.5 rims (+25 backspacing) with 37x12.5


  • Max Lift: 3.5"F/1.0"R - Maximum Tire Dia: 37"
  • For use on 2017-2021 Super Duty 4WD with 1-piece drive shaft
  • Includes radius arm drop brackets, track bar relocation bracket, front coil spring spacers and tapered 4" lift rear blocks
  • Keeps your factory ride
  • Will never wear/break/fail
  • Toughest finish
  • Safest way to lift
  • Limited 1-Year Warranty


  • Lift/Drop Height: 3.5"
  • Front Lift Type: Coil Spring Spacer
  • Rear Lift Type: Blocks
  • Maximum Tire Size: 37 x 12.50 (Wheel and tire information listed is strictly for reference. Wheels and tires must be test fit before vehicle is returned to service, due to variances in actual installed lift height and tire size from various manufacturers.)
  • Wheel Offset (MM): 25
  • Wheel Backspacing (IN): 6.00
  • Shocks: Without Shock Absorbers In Kit - Shock Change Not Necessary
  • Shock Type: No Shocks
  • Color: Black Components
  • WARNING CA Proposition 65: WARNING Cancer; Birth Defects; and Reproductive Harm

Tire Fitment:

  • Recommended tire size: 37" - 12.5"
  • Recommended wheel: 17" and up x 9" wide, +25 offset / 6" backspacing (minor trimming of the front valance may be necessary)
  • When lifting a vehicle and installing aftermarket wheels and tires, a tire manufacturer's construction and material quality can alter vehicle ride quality
  • When increasing a vehicle wheel and tire size, most larger aftermarket truck and SUV tires are 8-ply (or more) E tires compared to typical OEM 6-ply C tires
  • This more rigid sidewall construction increases the perception of suspension stiffness often described as ride harshness
  • The ride, handling, traction, noise, fuel economy, and wear differences between All-Season, All-Terrain, Mud-Terrain, or Trail-Terrain type tires can be significant
  • Please take into account tire and wheel choice will generally have a meaningful impact on the ride & handling experience


  • 2 - Coil spring spacers with poly sound isolators
  • 2 - Front shock extensions
  • Radius arm drop brackets
  • 2 - Front sway bar mount spacers
  • 1 - Front track bar relocation bracket
  • 2 - OEM style cast rear lift blocks
  • Longer U-bolts
  • Hardware
  • 2 - Bump stop extensions
  • Extended length front brake line brackets


  • For use on 2017-2021 Super Duty 4WD with 1-piece drive shaft
  • Single Rear Wheel Trucks ONLY - Not compatible with Dual Rear Wheels
  • The lift blocks in this kit are not designed to work with aftermarket or factory add-on air spring/load leveling kits that attach to the bump stop tangs
  • Use of this type of air bag system will void all block warranties and can cause failure of the block bump stop tang
  • 2020 MY Super Duty may sit slightly taller in the rear than prior model years due block height variations from the Ford factory
  • The additional rake works well visually with the vehicle's body lines
  • Not compatible with TREMOR editions