Westin 21-534310
Polished 304 stainless steel; Crew (5.5-ft bed) or Quad (6.5-ft bed).
Westin PRO TRAXX 5 Wheel-to-Wheel Steps: Ram & GM Fit
Westin PRO TRAXX 5 wheel-to-wheel nerf bars use a 5-inch oval tube with an extra step toward the pickup bed. They come as model-specific bar-and-mounting kits, with black powder-coated steel and polished stainless versions. Cab type and bed length matter before finish preference.
Five-inch wheel-to-wheel step bar comparison
Each pair shares its intended cab and bed configuration while the finish changes: polished 304 stainless steel versus black powder-coated, E-coated steel. Verify the specific model year and bed against Westin's application information.
| Manufacturer part | Truck family | Cab / bed configuration | Finish | Construction |
|---|---|---|---|---|
| 21-534310 | Ram 1500 / 1500 Classic | Crew (5.5-ft bed) or Quad (6.5-ft bed) | Polished | 304 stainless steel |
| 21-534315 | Ram 1500 / 1500 Classic | Crew (5.5-ft bed) or Quad (6.5-ft bed) | Black powder coat | E-coated steel |
| 21-534320 | Ram 1500 / Classic and 2500/3500 | Crew Cab | Polished | 304 stainless steel |
| 21-534325 | Ram 1500 / Classic and 2500/3500 | Crew Cab | Black powder coat | E-coated steel |
| 21-534570 | Chevrolet Silverado / GMC Sierra 1500–3500 | Crew Cab | Polished | 304 stainless steel |
| 21-534575 | Chevrolet Silverado / GMC Sierra 1500–3500 | Crew Cab | Black powder coat | E-coated steel |
| 21-534590 | Chevrolet Silverado / GMC Sierra 1500–3500 | Extended or Double Cab | Polished | 304 stainless steel |
| 21-534595 | Chevrolet Silverado / GMC Sierra 1500–3500 | Extended or Double Cab | Black powder coat | E-coated steel |
Westin model groups: 21-534310/315 covers selected Ram 1500/Classic Crew or Quad configurations; 21-534320/325 covers selected Ram Crew Cab 6.5-foot beds. For earlier GM trucks, 21-534570/575 covers Crew Cab and 21-534590/595 Extended or Double Cab applications.
Cab and bed length are essential. A wheel-to-wheel bar for a Crew Cab does not automatically fit a Quad, Extended or Double Cab. These Westin kits include mounting hardware; the manufacturer says most applications bolt on without drilling, but the vehicle-specific installation instructions control.
Before choosing a set
- Confirm the body and cab: Ram Crew and Quad Cab bars are not automatically interchangeable; GM Crew bars differ from Extended/Double Cab versions.
- Measure the bed: Ram 1500 21-534310/315 uses a different bed/cab arrangement from 21-534320/325. The GM part numbers also vary by cab.
- Choose construction: polished bar versions are stainless steel; black versions are E-coated steel with a powder-coated finish.
- Check mounting equipment: full kits include vehicle-specific brackets; a bare second-hand bar may lack the required hardware.
- Check OEM equipment: sidesteps, underbody attachments and the truck's exact model year can affect fit. Use Westin's model-specific application data.
Explore matching step-bar sets
Use the exact manufacturer number when ordering. These products ship from supplier warehouses; in-person viewing and pickup are unavailable.
Westin 21-534315
Black powder coat e-coated steel; Crew (5.5-ft bed) or Quad (6.5-ft bed).
Westin 21-534590
Polished 304 stainless steel; Extended or Double Cab.
Westin 21-534595
Black powder coat e-coated steel; Extended or Double Cab.
Other wheel-to-wheel step-bar guide
Compare TrailFX black and polished wheel-to-wheel step bars for another truck-specific line with different finishes and mounting arrangements.
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