Service Kit: Radius Arm Bushing by BDS Suspension
This replacement bushing kit is designed for the BDS radius arms for 2005-2026 Ford F250/F350 Super Duty, 2014-2027 Ram 2500, and 2013-2027 Ram 3500 4WD trucks. These large 3-1/4" rubber bushings to minimize road vibrations while allowing for long, maintenance-free bushing life. Kit includes 1 bushing assembly for quick and easy installation. Fits lift kits with component boxes 123251 and 122321.
Similar/Previous: BSD123251,BDS122321
Wheel Backspacing & Offset Calculator
Convert wheel backspacing in inches to offset in millimetres, or the other way around. Find the right measurements for your wheel setup.
Backspace to Offset Calculator
Enter wheel width and backspace (inches). Offset can be positive or negative.
- Backspace
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- Offset type
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Enter a valid wheel width and measurement to view the diagram.
BDS wheel positioning guidance
Meeting a backspacing limit does not guarantee wheel fitment. Check wheel diameter, tyre size, brake clearance, suspension and all kit-specific requirements.
Results are approximate. The calculation allows an additional 1 inch for the wheel's two rim flanges (approximately 0.5 inch each). Actual flange dimensions vary between wheels.
Understanding wheel measurements
What is wheel backspacing?
The distance from the wheel mounting surface to the outermost edge of the inner rim flange, measured in inches.
What is wheel offset?
The distance between the wheel mounting surface and the wheel centreline, measured in millimetres.
Why does wheel width matter?
Two wheels with the same backspacing but different widths will have different offsets.
Why does BDS specify backspacing?
It helps position the wheel relative to steering and suspension parts, but is only one part of confirming fitment.
