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Zone 4.5\

Home / Brands / Suspension Brands / Zone / Suspension Lifts / Zone 4.5" Radius Arm Suspension System | 2014-2018 Ram 2500 (Diesel) /

Zone 4.5" Radius Arm Suspension System | 2014-2018 Ram 2500 (Diesel)


Free shipping to the lower 48

Financing Available

All Zone products are experiencing 5-6 weeks delayed shipping. Additional delays are possible.

Part Number



Zone Offroad Ram 2500 4.5" Radius Arm Suspension Lift System. The new Ram 2500 gives new meaning to "Heavy-Duty". Holding true to that we have developed a lift system centered around 2 new massive radius arms to replacement the factory arms.

The new arms are fully boxed, internally gusseted and designed to bolt in the factory location while adjusting the suspension geometry for 4.5 to 6.5" of lift. The arms utilize extra large, greaseable bushings at the frame and are designed to use the factory alignment cams at the axle. They are formed for maximum tire clearance. Lastly, they just flat-out look cool and are a nice upgrade from the standard radius arm drop systems.

In the rear, the new 4 link suspension designed is modified for 2.5" of lift via a new heavy duty coil spring spacer setup. The coil spring spacers located and bolt directly to the factory axle mount. The new provided track bar relocation bracket centers the axle. Extended sway bar links and bump stops round out the rear kit components.

Quick Specs:
  • Front Lift Height: 4.5"
  • Front Lift Method: HD Replacement Radius Arms
  • Rear Lift Height: 2.5"
  • Rear Lift Method: Spacer
  • Install Time Hrs: 6
  • Difficulty Level 1-5: 3
  • Wheel Size: 17x9+
  • Back Spacing: 4.5"
  • Max Tire Size: 35 X 12.50
  • Wheel Size: 17x9+
  • Back Spacing: 5.625"
  • Max Tire Size: 37 X 12.50


  • Heavy duty Internally Gusseted Radius Arms
  • Progressive Rate Front Coil Springs
  • Correct Suspension Geometry
  • Heavy duty Track Bar Relocation Bracket
  • Drop Pitman Arm
  • Extended rear sway bar links
  • Application specific valved shocks
  • Bump stop extensions


  • *Kit images show upgraded Nitro (black) shocks*
  • Although very rare, front driveline vibration may occur at speeds over 35 mph when in 4WD. If this occurs, install the appropriate optional t-case indexing kit. Optional t-case indexing ring kit recommended to reduce front driveline angle. Models with a 6 bolt transfer case use part # D5623. Models with an 8 bolt transfer case use part #D5813.
  • Vehicles equipped with a two piece drive shaft and a carrier bearing require bearing drop kit D5405.
  • Not designed for factory rear airbag suspension models.
  • Will not fit Power Wagon models

Shipping Note: Due to current health restrictions and precautions, at this time all BDS, Zone and JKS products will carry a longer than normal shipping delay, around 2-5 weeks. We apologize for this inconvenience and are happy to answer any questions or concerns you may have regarding your order. If you are needing the product sooner, please contact our customer support team and we will be happy to try and accommodate your needs.


2018 Ram 2500 Big Horn 4WD
2018 Ram 2500 Laramie 4WD
2018 Ram 2500 Laramie Longhorn 4WD
2018 Ram 2500 Limited 4WD
2018 Ram 2500 SLT 4WD
2018 Ram 2500 Tradesman 4WD
2017 Ram 2500 Big Horn 4WD
2017 Ram 2500 Laramie 4WD
2017 Ram 2500 Laramie Longhorn 4WD
2017 Ram 2500 Limited 4WD
2017 Ram 2500 SLT 4WD
2017 Ram 2500 Tradesman 4WD
2016 Ram 2500 Big Horn 4WD
2016 Ram 2500 Laramie 4WD
2016 Ram 2500 Laramie Longhorn 4WD
2016 Ram 2500 Limited 4WD
2016 Ram 2500 Outdoorsman 4WD
2016 Ram 2500 SLT 4WD
2016 Ram 2500 Tradesman 4WD
2015 Ram 2500 Big Horn 4WD
2015 Ram 2500 Laramie 4WD
2015 Ram 2500 Laramie Limited 4WD
2015 Ram 2500 Laramie Longhorn 4WD
2015 Ram 2500 Lone Star 4WD
2015 Ram 2500 Outdoorsman 4WD
2015 Ram 2500 SLT 4WD
2015 Ram 2500 Tradesman 4WD
2014 Ram 2500 Big Horn 4WD
2014 Ram 2500 Laramie 4WD
2014 Ram 2500 Laramie Limited 4WD
2014 Ram 2500 Laramie Longhorn 4WD
2014 Ram 2500 Lone Star 4WD
2014 Ram 2500 Outdoorsman 4WD
2014 Ram 2500 SLT 4WD
2014 Ram 2500 Tradesman 4WD

About Us
We are dedicated to helping you find the perfect fitment for your ride while also bringing you the highest quality, affordable aftermarket parts in the world! We are truck and car enthusiasts who build their dream rides with these very products.

Shipping times vary depending on item and immediate availability. Many suspension kits will ship out within 3-5 business days while some select items may take up to 7-10 business days. You will receive the tracking information via email as soon as it is available so you can easily track your package(s) from us, to your door. Keep in mind, some suspension components may ship separately and could arrive at different times. All shipping prices are based on the lower 48 states unless specified otherwise. Always inspect your items immediately upon receipt and notify us within 5 business days if there are any concerns, damages, or missing items.

WARNING: This product can expose you to Nickel, which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to p65warnings.ca.gov.

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