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  1. Nerf Bars - Running Boards
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Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel

Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel

Item # 21-3545
Our Price: $275.54
You Save: $124.42
Nerf Bars - Running Boards

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Shipping Weight: 48 lbs
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Westin Nerf Bars - Running Boards - 21-3545
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The curved ends on these black powder coated step bars give your vehicle a streamlined look. Footpad areas are recessed, rather than cut out, preserving the strength of the steel and providing a solid, rustproof step into your truck. Fastest Shipping and Great prices for Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel. Read our customer reviews of Westin nerf bars - running boards. Call 1-800-940-8924 for expert service or order your nerf bars - running boards part number 21-3545 by Westin online at
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  • Reviews (108)
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Westin Nerf Bars - Running Boards - 21-3545

  • Nerf Bars
  • Fixed Step
  • Cab Length
  • Black
  • 4 Inch Wide
  • Steel
  • Westin
  • Oval
  • Gloss Finish

The curved ends on these black powder coated step bars give your vehicle a streamlined look. Footpad areas are recessed, rather than cut out, preserving the strength of the steel and providing a solid, rustproof step into your truck.


  • Cab-length, oval nerf bars make it easy to get into and out of your vehicle
    • Greater stability than narrower round bars
  • Curved ends of step bars give a finished, street-style look
  • Non-slip step pads sit in recessed tube areas instead of cutouts
    • No holes in tubing means maximum strength and durability with no internal corrosion
    • Sturdy polymer plastic construction resists UV rays, fading, and cracking
  • Mild steel with black powder coat finish is long-lasting and rust resistant
  • Mandrel bending at corners eliminates creases in tubing
  • Custom fit for your vehicle
  • Quick and easy bolt-on installation with included hardware
    • No drilling required


  • Tubing width: 4"
  • Step pad width: 4"
  • Step pad quantity: 2 per bar
  • Quantity: 2 nerf bars
  • 3-Year warranty

The step pad areas in Westin's Platinum Series oval nerf bars are indented instead of cut out, maintaining the structural integrity of the steel tubing and preventing internal corrosion. 90-Degree mandrel bending at the corners means that there are no creases in the bars. This minimizes the chances of chips and rust at the bends and makes for sleeker, better-looking step bars.

U-Style Tube Steps

As shown in the image above, these step bars have a U-style tubing, which ensures that each bar conforms perfectly to your vehicle. Installation is quick and simple - just bolt the mounting brackets to existing holes in your truck's frame. No drilling is required.

21-3545 Westin Mild Steel Oval Tube Steps with Wide Steps - Platinum Series - Black Powder Coat - 4" Wide

This Product Fits The Following Vehicles

California residents: click here

Video of Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Westin Platinum Series Oval Nerf Bars Review

Hi there truck owners. Today, we're going to be taking a look at Westin's line of Platinum Oval Nerf Bars. These are available either in black, like you see here or in stainless steel. They're custom designed to fit your truck, so you'll want to use our fit guide to determine the appropriate part number for your vehicle. Now there's a lot of reasons you might want Nerf bars, whether it's just the appearance you get with it, as it does kind of make your truck look a little bit bigger and more rugged, but also for its benefits of getting in and out of the vehicle. It makes it easier because you've got a step, so you don't have to work as hard getting in and you've also got a surface that is non-skid.

This is particularly useful for people with mobility issues, younger children, or if your truck has just lifted way up in the air and you can use a step to get in.These are four inch diameter, Nerf bars and I like the oversize pads on them. A lot of Nerf bars and running boards out there, they just seem too small for my large feet but with this I don't have any issues getting my foothold on top so I can easily get in. And in inclement weather, the Westin logo and textured surface will provide traction. Now, regardless of which model truck you have, you'll have one pad for each door. And in some cases you may even have an additional pad where the step will extend back to help you get into the bed of the truck.

These steps not only look rugged and durable, but they are rugged and durable. They're constructed of a steel. The inside of the tube is hollow, but it's a nice thick steel that does have no give, I mean, and with the round shape, it's not going to collapse.It's that such a strong shape And I weigh about 200 pounds and you can see when I get on the Nerf bar here, there's no flexibility. The truck moves. I can bounce up and down and I feel nothing.

There's no movement. It's as if it was just part of the truck. Another feature it has over other Nerf bars, is it's mandrel bended, 90 degree turns at each end of our Nerf bar. This bend is not only stronger, but it also gives your truck a sleeker look as it curves in to fit the body. And without there being any creases in it due to that mandrel bending process, it's going to be more resistant against corrosion as there's no places for water to collect in those creases.

So with how solid our Nerf bar is here, it will easily last the lifetime of your truck.Now, the step pads here are going to last a long time, but these may need to be replaced at some point, over time. They are resistant against UV rays, but like all plastics, when they're outside in the elements, heating up and getting cold, they do get brittle and at some point it will eventually crack and you may need to replace them. We do have replacements available here at and it's a cinch because they simply just snap in and speaking of the pads and how they attached, one of the processes they used when constructing the Nerf bar here. Many of your Nerf bars are going to cut out an area for the pad to sit on but with these Western bars, it's actually bent down into a concave area for our pad to go down into. With it being bent down instead of cut out, we've got the full integrity of our bar as it's still solid all the way around.You'll receive two Nerf bars with your kit, one for your passenger side and one for the driver's side, all of the hardware that you'll need to get installed comes included. And all of our brackets are going to Mount underneath giving us a location to get our Nerf bar installed here on the side. Now, if you are interested in that extra step to get into the back of your truck, you'll want to make sure that you get the wheel to wheel Nerf bars from the Platinum Series. And they're also great if you have any roof mounted accessories, as things on your roof, while a pretty tall guy could still load stuff up here, it's a lot harder to lift things up over your head, so now we've got a step here that we can use to keep those items down below our head and get everything loaded up.And if you've got a cargo box on there, you can easily route around inside of it and be able to see the things that you're trying to find. Another popular Nerf bar from Westin is the Pro Traxx. I've gone ahead and installed the Pro Traxx here just on our passenger side with our Platinum Ovals on the driver's side, so you can get an idea of what they're going to look like. Now you can see here, it has plastic covers over the brackets, both in the middle and the front and the rear, and they are plastic and it's nice that it's got something there. It makes it look like a larger bracket than it actually is as it's really just a piece of metal like this turned sideways, so it makes it look much more substantial. I'm not a big fan though, of the plastic hardware. I like the Platinum Series better on the other side, as it's just got the solid metal brackets for the center here.What I also like on the Platinum Oval on the other side, the way that it has a full 90 degree bend that turns into the vehicle. So it looks like it just goes right in and it has a better look in my opinion, then this here with a gap and it also feels sturdier as it attaches to the center of the Nerf bar on the other side, where our brackets are underneath. There's more bracing. With the Pro Traxx here it seems fine. I can step up and down on it, but if I bounce up and down on this side, versus the other side, the other side has no movement. It feels very solid. This side here, it doesn't feel in any means that something's going to happen with it. It just doesn't feel quite as sturdy. So when deciding on which Nerf bars is going to be best for you. The two things that I really look for are its durability and the way that it looks. And the Platinum Oval to me, hits both of those marks better than the Pro Traxx. And that completes our look at Westin's Line of Platinum Oval Nerf Bars.

Customer Satisfaction Score:

Customer Reviews

Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel - 21-3545

Average Customer Rating:  4.6 out of 5 stars   (108 Customer Reviews)

The curved ends on these black powder coated step bars give your vehicle a streamlined look. Footpad areas are recessed, rather than cut out, preserving the strength of the steel and providing a solid, rustproof step into your truck.

2015 Ram 1500

These really make my truck look BEEFY.


Nice price. Easy to install, heavy duty brackets and hardware. Tubes have a nice wide step and look good too.



Excellent product. Looks great on my vintage 2004 Silverado. Easy installation once I CAREFULLY removed the body mount bolts. Only suggestion would be to include the torque specs for the body mounting bolts for reinstallation.


These Nerf Bars are just what my truck needed! They look awesome and were a cinch to install. Customer service is also great and I can’t say enough about the ETRAILER web site. Will definitely use them again!!


After 1 year I have nothing bad to say about these bars they do as I wanted getting everyone in and out of my truck with ease. It was more for protecting the seats from sliding in and out not to break down the seat cushion and to protect the cloth seats from tears, but after sitting in the truck at a shopping center it does something I never thought of, other people hit the bars with car doors not my truck, they still look like new


I am very happy with these running boards. They are just the right width for easy use. They are solid, and they installed easily on my Tundra. I would buy these again if I had it to do over.


Installed on 2018 Tacoma sport. Unfortunately, it arrived with a ding in the passenger side bar. It was very disappointing, but by the time I saw it (I should have thoroughly checked both bars before starting install), I had already installed the driver’s side. I said, to heck with it and didn’t bother with a return.

It was an extremely easy install with quick delivery and overall, they look great. Now, I don’t have to haul myself up into my Tacoma. The step inserts are basically a heavy duty plastic. I figure if they are slippery, I can spray them with a propert texturing coating. At some point, I’ll probably also texture/ mat spray the bars themselves since they’re gloss finish.


The step/bars look good. Install wasn't tough but Westin's instructions are poor- I just figured it out on my own.

While the packaging looked stout, 3 of the 4 open bar ends were bent in, like someone dropped the box on both ends. I did a decent job of banging the dents out and installed them. Those ends aren't seen once installed. Someone needs to look at a better way to protect them during shipping.

Overall I'm just satisfied with the product.


It just was delivered today. I want be able to write a review until I get them installed.
Price was good and shipping was very fast.


Excellent product and great value. Installation of the brackets and bars were simple and did everything myself. Bars are lightweight, but very sturdy and robust. The plastic steps are rather heavy duty and not loose. The 4 inch diameter is the perfect size for my needs: doesn't stick out far like most running boards and not too small to where my feet wouldn't get good purchase on a step.
The bars weren't has curved inward under the body as advertised. The pictures show these bar curve in a lot, but the bars I got only had a slight bend at the ends. If you've got front mudguards, the bar will touch the guard; it wont actually put pressure or bend the mudguard, but just touch it. Despite the inaccuracy of the pictures, it turned out well as the mudguard would interfere with a fully curved in bar. It still looks sleek. There really isn't much of a gap between the bars and body, the bar isn't low so my ground clearance isn't compromised.
Overall, great bars that look great and function well.


These Western tube steps fit my 2013 Silverado Reg. cab perfect, even with the DEF tank.
Installed quickly, and look great.
Thanks Chris W. at


High quality, easy installation and good fit.


Look nice. Easy installation. The instructions were a little vague.


Easy install using the video, had all the parts needed, very solid nerf bars.


Product is as described. Installation was not complicated and easily done by one person. Fit perfectly on my 2018 Ram 3500. Install tip: duct tape is your friend when you fumble one of the nut holders into the frame. That will slow you down. :-)


Installed the Westin 21-3610 4 in oval SS step bars on my 2015 Jeep GC Summit.Hemi California edition - perfect fit. See photos. After 2014 Jeep uses 12 mil plastic stickers instead of the rubber plug caps for the oval cutouts as called out in the Westin install procedure - use a small wood chisel to remove the cover stickers carefully.


Both nerf bars arrived with dents in th em


The product was flawless: E.Trailer is great when it comes to taking your order and processing it whether it's in stock or "drop shipped" from the manufacturer.


Product looks nice and installs well but came w a chip in rear of tube. Not a very durable product.

Instructions, luckily very simple, we’re laid out terribly w poor illegible graphics.


This is my third purchase of this type of nerf bar step system and they have proven to be rugged and very functional in Wyoming’s back country and temperature extremes. I ran into a bit of difficulty with this set as one of the nerf bar center supports was incorrectly located. etrailer’s Ashley helped resolve and shipped a replacements. Fantastic customer service as always.!


As others have noted, the instructions are not terribly robust, but once I got oriented, I was able to move along quite quickly. Either the rear brackets were mis-labeled, or the 2017 frame is slightly different. Swapping the parts side to side made the holes line up the way they should. Install took less than 90 minutes. I'm very pleased with the fit, finish, and the always fast service from e-Trailer.

The package arrived early in the day because the UPS driver didn't want to work around it in his truck all day. That meant I could install them right away. Nice!


Good product but did not fit my 2019 F150 with 6'7" bed as claimed by Westin. I was able to get them on, but, they did not go over the stake pockets as they are supposed to. I notified etrailer of the issue and they quickly accepted a fully refunded return … even though I had installed them. Hopefully the product listing on the website was corrected so that no one else will get them in error. KUDOs to the etrailer folks for working with me on this!!


My Westin Oval Nerf Bars (running boards) are perfect on my 2021 Tundra. They were not difficult for this 74 year-old female person to install - the design is a perfect fit. They look great, and really make it easy to climb in and out of my truck. Love them!


My nerf bars were delivered on schedule and they mounted easily per the included instructions. I primarily wanted them as a step and they look and work great. I wish I had mounted them a long time ago. If you're thinking of purchasing them, go for it.

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Employee David F
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Employee Jessie B
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