Overview
The Westin ProTraxx 5 in. Oval Step Bar Wheel-To-Wheel, part number 21-534665, is a black oval nerf step bar set for the 2017–2019 Ford F-250 Super Duty and F-350 Super Duty. These are nerf steps, a type of side step, and the wheel-to-wheel layout is the design named in the product title.
The 5 in. oval tube has a heavy-duty step pad for a wide, secure stepping surface. Its 30 degree OE-style bends finish in domed ends, leaving no end caps or exposed bolt heads. The set mounts without drilling.
Key features
- 5 in. oval tube with 30 in. OE-style bends
- Domed ends with no end caps or exposed bolt heads
- Heavy-duty step pad for a wide, secure stepping surface
- No drilling required
- Mounting kit included
- Black powder coat finish, backed by a 3-year warranty
Wheel-to-wheel bar layout
A wheel-to-wheel bar runs the full length between the wheels, so it gives a wider stepping area than a short side step. The layout is common on heavy-duty trucks where passengers and gear need a broad, secure surface. The trade-off is that the bar sits low across the rocker line, which means it can meet obstacles over its full length.
Before choosing, measure your clearance over the front and rear wheels and think about your typical terrain. Long bars are easier to strike on ledges and rocks, so inspect the bar and the mounts after trail use. The domed ends help limit snag points, but the leading edge still deserves a look.
A mounting kit ties the bar to the frame, so check fasteners often and tighten them if they loosen.
Specifications
| Brand | Westin |
|---|---|
| Part number | 21-534665 |
| UPC | 707742079485 |
| Type | Wheel-to-wheel oval nerf step bars |
| Tube size | 5 in. oval |
| Bends | 30 in. OE-style bends, 30 degree |
| Ends | Domed, no end caps |
| Step pad | Heavy-duty |
| Finish | Black powder coat |
| Installation | No drilling required; mounting kit included |
| Warranty | 3 years on black powder coat |
Vehicle fitment
It fits the 2017–2019 Ford F-250 Super Duty and F-350 Super Duty, with Lariat, XL and XLT trims covered for both.
The list does not include the Ford F-150, F-450 or F-550, or Super Duty years outside 2017–2019. Confirm your vehicle’s year, model and trim before ordering.
What’s included
The set includes the wheel-to-wheel oval step bars with their heavy-duty step pads and the mounting kit.
