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  1. Nerf Bars - Running Boards
  2. DeeZee
  3. Nerf Bars
  4. Fixed Step
  5. 3 Inch Width
  6. Black
DeeZee Nerf Bars - 3" Round - Black - Cab Length

DeeZee Nerf Bars - 3" Round - Black - Cab Length

Item # DZ372251
Our Price: $274.79
You Save: $91.20
Nerf Bars - Running Boards

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DZ372251 - 3 Inch Width DeeZee Nerf Bars
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These 3" round tube steps make it easier to climb in and out of your truck. Their molded plastic step pads are non-skid for secure footing. Black powder coat finish on the steel resists rust and corrosion. Custom installation kit included. Fastest Shipping and Great prices for DeeZee Nerf Bars - 3" Round - Black - Cab Length. Read our customer reviews of DeeZee nerf bars - running boards. Call 1-800-940-8924 for expert service or order your nerf bars - running boards part number DZ372251 by DeeZee online at
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  • Reviews (1)
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  • Videos (2)
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DeeZee Nerf Bars - Running Boards - DZ372251

  • Nerf Bars
  • Fixed Step
  • 3 Inch Width
  • DeeZee
  • Black
  • Steel
  • Round
  • Gloss Finish
  • Cab Length

These 3" round tube steps make it easier to climb in and out of your truck. Their molded plastic step pads are non-skid for secure footing. Black powder coat finish on the steel resists rust and corrosion. Custom installation kit included.


  • 3" Wide, round nerf bar gives you a step up into your cab
    • Molded plastic step surface for secure footing
  • Gloss black powder coat finish on bars blends with your OEM trim
  • 90-Degree mandrel bends maintain the integrity of the bar and provide a sturdy, stylish look
  • Custom fit for your vehicle
    • Installation kit with mounting brackets and hardware is included
    • No drilling required
  • Powder coated steel bars and mounting brackets resist corrosion


  • Quantity: 2 tube steps - 1 for each side
  • Tubing diameter: 3"
  • Step pad dimensions: 21" long x 3" wide
  • 3-Year warranty

DZ372251 Dee Zee Black Powder Coated Steel 3" Round Nerf Tube Steps

Installation Details DZ372251 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Video of DeeZee Nerf Bars - 3" Round - Black - Cab Length

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

Video Transcript for DeeZee Round Nerf Bars Installation - 2014 Ram 1500

Speaker 1: Today on our 2014 Ram 1500, we're going to be taking a look at the DeeZee Nerf Bars in black, part number DZ372251. Now, they're also available in stainless steel, part number DZ372253.So, here's what are DeeZee steps look like when they're fully installed, and not only are they going to give our truck a stylish look, but they're also going to serve the purpose to help us get in and out of our truck with confidence. We're going to have 3" wide round bars with a molded plastic tread that's going to make sure that we have a secure footing, whether we're getting in or out of our truck. Our bars are going to feature a black powder coat finish, which is not only going to blend well with the factory trim on your truck, but is also going to complement any color.Now, on each end of the bar, it's going to have a mandrel bend, which means it's going to have that structural integrity but also give us that stylish look where it kind of goes underneath the cab instead of just stopping and hanging out back here. Now, our bars are going to have a steel construction, and the powder coat finish on the bars, as well as the brackets, are going to help resist rust and corrosion.Now, these are the cab length bars, which means they're going to go from the front of our cab, and they're going to stop at the back. Since we have a crew cab here, we are going to have the front step as well as the back step.

Now, each one of our steps is going to be 21" long by 3" wide and have a nice tread pattern here to make sure we have a secure footing. Now that we've seen what they look like and gone over some of the features, let's go and show you how to get them installed.So, we're going to start on our driver side to begin our install, and we're going to want to come right behind the driver side front tire just on the inside in between our frame and the body. Now, if we come to the inside of the body right here, you can see these gray section squares that are marked out. That's because originally from the factory these holes are going to be covered up with some tape or a sticker, but ours don't have them. So, if yours does, go ahead and peel those back to expose those two oblong holes.Now, we're going to be using the first oblong hole as well as the second one and then this hex-shape hole right here for our mounting locations.

You're going to want to grab the 10mm bolt plate and the corresponding plastic washer. It's going to fit a little snug, and we're just going to thread it onto the end of it just a little bit, just enough so you can grab the bolt still.We're actually going to feed that into that hole, and that plastic washer is really just there to help it from falling inside the frame, so we don't have to worry about dropping it. Once you have it inside the frame, you're going to want to thread that washer plate on as much as you can get it, and mind you, it's not going to get real snug. It's just going to keep that bolt from going inside.Now, for the rear attachment point here on the front we're going to have the same kind of style, but it's going to have a 12mm bolt with a 10mm nut welded to the plate. We're going to grab the larger plastic washer and we're going to do the same type of thing.

We're just going to thread it on just a bit, so we still have a hold of it. We're going to feed the plate into the frame, and again, grab the bolt and rotate that washer until it's nice and snug and holding it in place.We're going to want to grab the driver's front bracket, and we're going to know because they're stamped and labeled with a DF for driver's front. So, if we take it with the bend following the bend in our vehicle, we're going to line up the holes and we're going to slide it over that 10mm bolt right there. We're going to come back and secure it with a flat washer followed by a 10mm lock washer, and then finally a nut following it up.So, we're going to take one of our 10mm bolts, followed by a lock washer, and then a flat washer. We're going to line up our bracket, rotate the weld nut into position, and then loosely thread the bolt in.

Now, we don't want to tighten this all the way down. We just want to go hand tight, so we still have a little bit of movement but just get it nice and snug, so we can make any adjustments if we need to.With our bracket loosely attached, we're going to want to grab the driver side support brace, and again, it's going to be marked with a D, so we're going to know that it's the right one. Now, this is going to attach directly to the body mount up top and line up with this hole on the bottom of our bracket. Now, if you notice there's only going to be one way we're going to be able to put this on to where it lines up. So, the brace on the driver side, this extra piece here should be going towards the back. So, in order to get that bolt out, I'm going to take an 18mm socket and remove that bolt completely.We can line our bracket up and make sure we have it in correct orientation. We're going to take that factory bolt, slide it through the bracket, and reinstall it. Now, when we put this back in, you don't want to tighten it down all the way. You just want to take up some of the slack and get it nice and snug. With the front bracket on, we're going to move to the back side, and we're going to be coming right in front of the wheel well but still on the cab of our truck.Our attachment points, again, are going to be underneath this sticker if yours is still there. We're going to be using the oblong hole and the hex-shape hole that's toward the front of the cab. You're going to want to grab another one of the bolt and nut plates and another one of those 12mm plastic washers, and we're going to put it in the same way we did with the front. We can grab the rear bracket now. That's marked with a DR, so we know it's the correct one, and again, we're going to make sure that it's facing following the line of our body, so you want that L-shape to line up with the L-shape on the truck.Now, this time it is going to be slightly different how we mount it. We're going to rotate that nut into position, and again, we're going to take a 10mm bolt, flat washer, and lock washer, and we're going to loosely install it in place. Once you have it started and threaded, again, you just want to leave it hand tight so we can make any kind of adjustments later on if we need to. Up top for that 12mm bolt, we're going to follow it up with a flat washer, split lock washer, and secure it down with a nut. Just want to leave everything tight and snug but enough so you can make those adjustments if you need to.Now with an extra set of hands I'm going to have him hold the bar in place while I get my hardware ready, and we're going to take a 1/2" bolt, followed by a lock washer, and then finally a flat washer, and we're going to go through our bracket into the weld nut that's on the bar. Make sure and get these in there hand tight so we can get the other in place.One thing I want to mention, the way you're going to know if it's a left or right side step is the towards the front of our steps we're going to have the short section. It's going to be shorter than the back is, and the step here is going to line up with the seat if we open the door and double check. So, now we can go ahead and make sure that our bars are nice and straight and level, and once we get them adjusted, we can go ahead and start tightening then up.For my 10mm hardware, I'm going to come back with a 16mm socket and tighten everything up, and we'll move to the back and tighten those up as well. For the 12mm hardware, I'm going to be using an 18mm socket to snug it up. For my 1/2" hardware, I'm going to be using a 3/4" socket to tighten it up, and we'll do that for the back as well. Finally, using an 18mm socket, I'm going to tighten up that body bolt all the way. Now that the driver's side is on, we're going to go ahead and repeat that whole process on the passenger side. That'll finish up our look at the 3" Round DeeZee Nerf Bars, part number DZ372251, on our 2014 Ram 1500.

Customer Reviews

DeeZee Nerf Bars - 3" Round - Black - Cab Length - DZ372251

Average Customer Rating:  4.0 out of 5 stars   (1 Customer Reviews)

These 3" round tube steps make it easier to climb in and out of your truck. Their molded plastic step pads are non-skid for secure footing. Black powder coat finish on the steel resists rust and corrosion. Custom installation kit included.

2015 Ram 1500

Tips to save you an hour: Have a table or work bench available to organize the hardware and brackets, have somebody to hand you stuff. You need an 18mm socket, an 18mm deep socket, and a 16mm socket. You need a long extension, a long handled ratchet and a standard ratchet with a normal length extension. You only need to tighten one bolt fully before putting rail on. It is the front most bolt in the front bracket. Make sure bracket is in forward most position, and tighten it up. You won't be able to reach it after installing the cross brace that connects to the main body bolt (large bolt with huge washer that is part of the truck, not supplied hardware.)
After everything else is finger tight install the tube step and torque fully, then torque front bracket, rear bracket and you're done. Do it in any other order and you'll spend way too much time being frustrated.

Fitment is perfect, brackets work just as they should, look exactly like the instructions. Product seems more robust than similar tubestep my mechanic installed on previous truck for more than double this price.


See what our Experts say about this DeeZee Nerf Bars - Running Boards

  • Nerf Bar Recommendation for a 2013 Ram 1500 with Mudflaps
    Yes they can, I spoke to my contact at DeeZee and the DeeZee Nerf Bars # DZ372251 that you referenced are cab length and they would not interfere with the mudflaps on your 2013 Ram 1500.
    view full answer...
  • Recommended Nerf Bars For 2014 Ram 1500 Crew Cab
    The DeeZee Nerf Bars, part # DZ372251 have been confirmed as a fit for your 2014 Ram 1500 with the crew cab. These 3 inch wide gloss black bars feature 21 inch long step pads, and require no drilling for installation.
    view full answer...
  • Tube Step Recommendation for a 2011 Dodge Ram 1500 Regular Cab
    For your 2011 Dodge Ram 1500 with a regular cab you would want to pick a set of tube steps that are confirmed to work with your vehicle style. The part # DZ372251 is for crew cab models so it wouldn't work for you. For a similar set you would want the part # DZ372211.
    view full answer...
  • Tube Step Fit Recommendation for 2014 Dodge Ram 1500 Crew Cab
    We have a very similar set of tube steps that will fit your 2014 Dodge Ram 1500 Crew Cab but the part # AA205030 will only fit Mega Cab models. Instead you would need the part # DZ372251 which is very similar in construction and price and is a fit for the Crew Cab models.
    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...
  • Looking For Custom Fit Nerf Bar Brackets For A 2021 Ram 1500 Classic Tradesman
    As install brackets and hardware for nerf bars will all be brand specific, I cannot advise on a replacement without knowing this information, unfortunately. With that said, from looking at the picture you provided, it does look like you have something similar to the Aries Round Nerf Bars # AA205041 or Westin Platinum Series Oval Nerf Bars # 21-3565. Again, this is a guess and both of these are for a crew cab. What you may need to switch to is something like the Aries Oval Tube Steps #...
    view full answer...
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Info for this part was:

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Written by:
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Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
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Video by:
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