Tubular Radius Arm Upgrade for F-250/F-350 Super Duty (2023–2026)
- Fits 2023–2026 Ford F-250 and F-350 Super Duty 4WD
- Requires 3 to 6 inches of suspension lift
- Ships as a pair — one driver-side and one passenger-side arm box
- Tubular arms, 2 inch outside diameter, with adjustable caster cam at the axle
- Bolt-on with no drop brackets — 3 to 4 hours listed, downloadable guide available
The Trail Fortress check
Will it fit your truck?
✓ Fits
ONLY fits models equipped with 3-6" of suspension lift. Fitment on this page is based on the manufacturer’s application data.
About this kit
Tubular Radius Arm Upgrade, fitment-checked
Sold as a driver- and passenger-side pair, part 43701A replaces the factory radius arms on 2023–2026 Ford F-250 and F-350 Super Duty 4WD trucks running 3 to 6 inches of lift. Tubular construction at 2 inch outside diameter, OE-style rubber bushings, and an adjustable cam at the axle end for setting caster. It bolts on without drop brackets.
A lifted Super Duty pushes the factory radius arms out of their intended arc, and this pair addresses that without adding drop brackets to hold alignment. The kit arrives as two boxes, one arm per side, for 2023–2026 F-250 and F-350 Super Duty 4WD in XL through Limited trim. Each arm is tubular with a 2 inch outside diameter and carries an adjustable cam at the axle end so caster can be dialed in during alignment. Fitment is limited to trucks with 3 to 6 inches of suspension lift.
What’s in the box
Kit contents
- 1× Radius Arm Pass Upgrade Box 43701991A
- 1× Radius Arm Dr Upgrade Box 43701992A
Rough Country shares subassemblies across kits, so individual package labels can carry broader application ranges. The complete 43701A kit fits the vehicles shown in the fitment section above.
Specifications
Specs
| Brand | Rough Country |
| Part number | 43701A |
| UPC / GTIN | 00840269951947 |
| Shipping weight | 68 lb |
| Country of origin | US |
| Category | Suspension & Lift Kits › Control Arms & Track Bars |
| Installation guide | Downloadable PDF |
Why buy here