3.5" F250 F350 RADIUS ARM LIFT KIT 2017 for 2021 SUPER DUTY

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  • Regular price $ 1,299.95

F250 F350 3.5" Lift Kit for Ford Super Duty Lifts
F250 F350 3.5" Lift Kit for Ford Super Duty Lifts for Diesel Brothers Truck Giveaway

F250 F350 3.5" Lift Kit released of our newest generation of suspension lifts! Our “RAD” series (Radius Arm Drop) series. This new RAD line is the perfect balance between those that need an extremely rugged suspension lift, yet still want it to be stylish!

We address everything in this kit. Our coil spacers and shock extensions are designed to mimic the factory specs after this 3.5" lift and provide a great ride. Our rear blocks have the bumpstop pads built in to utilize the F250 F350 factory rear bumpstops that Ford designed in for the heavy hauling these trucks were designed for. Our drop brackets for the radius are the beefiest in the industry!

We went about it a little different. Instead of the drop bracket going up inside the factory radius arm pocket, we designed ours to mount uniquely outside. That adds width and strength. These features cost more to produce, but the end result is unmatched. All our steel is U.S. made and is at least ¼”, and in some instances even larger.  

Our "BOLT" series is an affordable option that retains all of our Rugged Off Road Design benefits  but offers a lower cost with the removal of our Identity Series RAD (Radius Arm Drop) Badge Kit. Our engineers consider 3.5" lift on F250 F350 Super Duties as an AFFORDABLE lift height because you can use many of your Super Duties original OEM parts including your current shocks. However, if your shocks are reaching the end of their useful life or if you just want to upgrade, we offer shocks that can be added to this kit. 

The image inset is courtesy of the Diesel Brothers November Truck Giveaway! The Stryker 4.5" RAD Series Lift Kit was used and brand referenced on their promotional video. 


Complete RAD Kit with Rear Block CONTENTS:


RAD Badge Kit added to your Radius Arm:

  • (qty 2) Stryker Identity Series 3.5” coil spacers with machined logo (above coil)
  • (qty 1) Track bar relocation bracket
  • (qty 2) Front sway bar drop brackets
  • (qty 2) “RAD” HD Identity Series drop brackets
  • (qty 2) Front bumpstop drops
  • (qty 2) Brakeline drop brackets
  • (qty 2) Rear blocks with built in HD bumpstop pads
  • (qty 4) U-bolts with hardware
  • (qty 2) STRYKER billet and machined radius arm faceplates with stainless hardware
  • (qty 2) Front shock extensions (replacement shocks are available)
  • (qty 1) Identity Series radius arm faceplate template
  • (qty 1) Drill bit
  • (qty 1) 10/32 tap
  • All other necessary hardware


  • 17-21 F250 F350 (gas or diesel)



  • Lift Height adjustable track bar for 2017 to 2021 F250 F350 Super Duty 4WD






      1. Massive 1.5" diameter forged solid steel construction
      2. Larger diameter than most, and much larger than factory/OEM
      3. Simple, easy, bolt-on installation - fits directly in factory location
      4. Adjustable while mounted, using grade 10.9 hardware
      5. Forged solid steel construction means no hollow tube and no welds to break
      6. Allows you to perfectly center your front axle
      7. Includes upgraded proprietary bushings




Feel free to contact us at sales@strykerordesign.com
or (865) 233-0076 with any questions!