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  1. Nerf Bars - Running Boards
  2. Westin
  3. Nerf Bars
  4. Black
  5. Cab Length
  6. 4 Inch Wide
THIS ITEM IS NOT A FIT FOR
1999 Kia Sportage
Westin

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

Part Number: 21-3555
115 Reviews | 10 Questions
In Stock
$325.70
Retail:$503.75
You Save: $178.05
 Nerf Bars - Running Boards
Not Confirmed to Fit

1999 Kia Sportage

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21-3555 - Gloss Finish Westin Nerf Bars - Running Boards
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21-3555 - Gloss Finish Westin Nerf Bars - Running Boards
Westin Cab Length Nerf Bars - Running Boards - 21-3555
Westin Oval Nerf Bars - Running Boards - 21-3555
Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel Black 21-3555
Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel Steel 21-3555

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Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel customer photo
Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel customer photo
Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel customer photo
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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 21-3555 by Westin online at etrailer.com.
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Westin Nerf Bars - Running Boards - 21-3555

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

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.


Features:

  • 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


Specs:

  • 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.



21-3555 Westin Mild Steel Oval Tube Steps with Wide Steps - Platinum Series - Black Powder Coat - 4" Wide



This Product Fits The Following Vehicles






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Customer Satisfaction Score:

Ratings & Reviews

4.6

115 reviews
5 Stars
(85)
4 Stars
(22)
3 Stars
(4)
2 Stars
(1)
1 Star
(3)
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by:
Fit was nice although the screw that was sent for the center mount was too short I found one in my miscellaneous fasteners that worked.
by:
2017 Ram 1500
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!
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by:
Looks great and holds up to the weight. Instructions weren't great, took a while to install, but defiantly recommend to anyone
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by:
Well worth the money and they look great! Thanks
by:
After watching an online video installation was a quick and easy,great product and as always great service from etrailer.com
by:
Easy install using the video, had all the parts needed, very solid nerf bars.
by:
Quick shipment & excellent installation fit!
by:
good quality
by:
2017 Ram 1500
Looks good, easy install, fast delivery
by:
Hide quality nuff bars. Look great
by:
2017 Ram 1500
Easy to install and good price
by:
by:
Looks great, easy installation!
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Lazer S. profile picture
Etrailer Expert

Lazer S.

9/23/2025

They do look good on your truck, Fran! They definitely match the blacked out look!

by:
1999 Ford F-250 Super Duty
Overall, a nice set of nerf bars with wide step and good look. The oval shape makes step wider without taking up ground clearance. They are strong. Install is pretty simple and all hardware was available and sized right. One of the two bars arrived with a small ding, so either packed that way (poor quality assurance) or packaging for shipment was inadequate…. Also, not mat finishes offered, so I had to scuff the gloss black and paint the bars with mat black to get a decent look. Does anyone really want glossy black anything? So, for me m, great shape and fit- but, unless you can fix minor dings and paint, you’ll be less than satisfied….
by:
2018 Toyota Tacoma
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.
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Nichole P. profile picture

Nichole P.

6/24/2019

Bars are still great. The little ding I simply don’t notice anymore. I’d give it 4 stars, simply because if the ding.

by:
2005 Dodge Ram Pickup
quality nerf bars but the instructions vague
by:
2026 Chevrolet Silverado 1500
everything looks good so far, opened box
by:
2009 Chevrolet Tahoe
Easy install, but the instructions were a bit lacking and not real clear to follow. But, it was straight forward otherwise. Product was nicely packaged and undamaged on arrival.
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by:
2018 Dodge Ram Pickup
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. :-)
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Andy

10/17/2019

Still going strong after a year. A few scratches from rocks but Id rather that than scrape up the truck. Does exactly what I needed them to do.

by:
2022 Toyota Tacoma
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.
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by:
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.!
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by:
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!!
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by:
Great fit!
by:
I have owned for one year. They were easy to install and have performed flawlessly. Highly recomend.
Robert profile picture

Robert

1/30/2026

GREAT! These fit perfectly and have held up perfectly. WHat more to ask?

Lazer S. profile picture
Etrailer Expert

Lazer S.

2/3/2026

@Robert Glad to hear they are still holding up for you, Robert! Westin makes some good stuff, for sure. : ) Did you use these to replace older worn out steps, or did your truck not come with any?
by:
2013 Chevrolet Silverado
Look nice. Easy installation. The instructions were a little vague.
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See what our Experts say about this Westin Nerf Bars - Running Boards

Do you have a question about this Nerf Bars - Running Board?
  • Replacement Mounting Brackets/Hardware for Westin Platinum Series Bars on a 2012 Dodge Ram 1500
    Yes, we do have the replacement brackets/hardware for the Westin Platinum Oval running boards that fit your 2012 Dodge Ram 1500 Quad cab. The brackets/hardware are going to be specific to both your truck and the nerf bar itself. The Replacement Hardware for Westin Platinum Series 4" Oval Wheel-2-Wheel Nerf Bars # 21-355PK will fit the Westin Platinum Series Oval Nerf Bars # 21-3555 (black) and the Westin Platinum Series Oval Nerf Bars # 21-3550 (stainless steel). As long as the nerf bars...
    view full answer...
  • What Is the Difference Between Westin PRO Traxx and Westin Platinum Series Nerf Bars
    The main difference between the Westin PRO Traxx # 21-53555 and the Westin Platinum Series # 21-3555 is that the PRO Traxx bars are straighter and will sit closer to the cab of the truck, where the Platinum Series bars extend out a little bit further from the cab. Other than that, they're both made from steel and are covered with a glossy black powder coat so their construction and color will be the same. It's really just a slight difference in style, but both of these bars are a confirmed...
    view full answer...
  • Westin Tube Step Recommendation for a 2010 Dodge Ram 1500 Quad Cab
    Yes, the Westin Tube Steps part # 21-3555 that you referenced have been confirmed as a fit for your 2010 Dodge Ram 1500 with a Quad Cab so they would work very well for you.
    view full answer...
  • Do Westin Platinum Series Oval Nerf Bars # 21-3555 Fit 2019 Ram 1500 Classic with Quad Cab
    Yes, the Westin Platinum Series Oval Nerf Bars # 21-3555 that you referenced do fit your 2019 Ram 1500 Classic with a quad cab.
    view full answer...
  • Replacement Mounting Hardware for Westin Oval Nerf Bars for 2020 Ram 1500 Classic Quad Cab
    I may have a solution for you, but the # 23-231PK are designed for round nerf bars that fit on 2002-2009 Ram trucks and not a 2020 Ram 1500. If you've got Westin brand steps on your 2020 Ram 1500 Classic like the Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel # 21-3555 you can use the Replacement Hardware for Westin Platinum Series 4" Oval Wheel-2-Wheel Nerf Bars # 21-355PK as replacement mounting hardware. If you've got a different aftermarket brand, please let...
    view full answer...
  • Nerf Bars for a 2015 Ram 1500 Quad Cab
    You are correct that the DeeZee Nerf Bars # DZ372251 are fits for the 2015 Ram 1500 crew cab. While there is no exact equivalent from DeeZee, a similar part would be the DeeZee Nerf Bars # DZ372231. If you are seeking bars that ran the length of the cab, I recommend checking out the Westin Platinum Series # 21-3555, which, like the DeeZee, are black rounded bars with non-slip pads. Another option to consider would be the Bully Round Nerf Bars # NB-1215BX; I've added a link showing an...
    view full answer...
  • Recommended Nerf Bars With Black Finish For 2012 Ram 1500 Quad Cab
    We do have Black running boards that are designed for your 2012 Ram Quad Cab. I have attached a link to the Black running boards on our website you can check out. I recommend the Westin Platinum Series Oval Nerf Bars, part # 21-3555. These bars are 4-inches wide and have a Black powder coated finish, and also require no drilling for installation. You can also check out the Rampage Xtremeline Running Boards With Custome Installation Kit, part # RA16180-14615. These 5-inch wide running...
    view full answer...
  • Can Westin Platinum Series Nerf Bars From a 2017 Toyota Tundra Be Used on a 2019 Ram 1500 Classic
    I am sorry to hear about your Tundra getting totaled. Unfortunately, there is not going to be any mounting hardware that will work for the nerf bars off your Tundra to mount them on your 2019 Ram 1500 Classic w/ quad cab. The reason that is the case, is because the mounting hardware is specific to both the nerf bars and truck. The nerf bars also come in different lengths/configurations for different trucks and even cab styles. We could get brackets that fit your current nerf bars or the...
    view full answer...
  • Recommended Westin Platinum Series Nerf Bars for 2019 Ram 1500 Classic Quad Cab
    I have a solution for you, but the Westin Platinum Series Oval Nerf Bars # 21-3565 are not a confirmed fit on your 2019 Ram 1500 Classic Quad cab-they are instead designed for the Crew cab models. Instead, I recommend the Westin Platinum Series Oval Nerf Bars # 21-3555 which are the same nerf bars you were looking at, only designed to fit on the Quad cab versions of the 2019 Ram 1500 Classic.
    view full answer...
  • Westin Nerf Bars That Fit 2020 Ram 1500 Classic Warlock Quad Cab
    While we have the exact nerf bars you need, that mounting hardware will not fit the nerf bars you mentioned, as both the mounting hardware and bars need to be compatible. Since those don't fit you should be able to return them to the place you purchased them and get the right nerf bars that I confirmed with Westin are a fit for your 2020 Ram 1500 Classic Warlock with a Quad Cab: - Westin Platinum Series Oval Nerf Bars - 4" - Black Powder Coated Steel # 21-3555 - Westin Platinum Series...
    view full answer...

Do you have a question about this Nerf Bars - Running Board?


Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Joshua S
Video Edited:
Joshua S
Employee Dustin K
Video by:
Dustin K
Employee Wilson B
Updated by:
Wilson B
Employee Jessie B
Updated by:
Jessie B
Employee Isabelle B
Updated by:
Isabelle B
Employee David F
Installed by:
David F

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