6-Inch or 3-Inch Running Boards? Compared by Specs
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When choosing between a 6-Inch vs 3-Inch running board, you face a clear trade-off in step surface area and design profile. Both options provide bolt-on installation for crew cab trucks, ensuring a secure fit without drilling. The primary difference lies in the step width and structural shape. One offers a broad, flat platform for maximum footing, while the other utilizes a round tube design with integrated pads. You must decide which footprint best matches your daily entry and exit habits.
Key differences
| Aspect | COMNOVA 6" Stainless Steel Running Board | TAC 3-Inch Round Side Steps for Ram Crew Cab |
|---|---|---|
| Step Width | 6 inches | 3 inches |
| Tube Shape | Flat/Rectangular | Round |
| Material | Stainless Steel | Heavy duty mild steel |
| Finish | Stainless Steel | Heavy Texture black powder coated |
| Weight Capacity | 500 lb | not listed |
Which one should you choose?
Choose COMNOVA 6" Stainless Steel Running Board if
- You need a wider, flat surface for secure footing
- You prefer stainless steel construction for corrosion resistance
- You want a higher stated weight capacity
Choose TAC 3-Inch Round Side Steps for Ram Crew Cab if
- You prefer a lower profile round tube design
- You want a black powder coated finish for a subtle look
- You drive a Dodge Ram crew cab model
Verdict: Choose the 6-inch model if you prioritize a broad, stable step and stainless steel durability. Opt for the 3-inch round tube if you prefer a sleeker profile and a black finish that blends with the truck. Your decision should hinge on whether you value step width or aesthetic integration.
Step Width and Build Specs
Step Width
The COMNOVA model offers a 6-inch wide step surface, providing a broader platform for your foot. This wider area is designed to offer secure footing when you step up into the truck cab. In contrast, the TAC side steps feature a 3-inch round tube design. While the TAC includes UV-resistant non-slip wide step pads to increase the usable area, the base tube width remains narrower at 3 inches. You will notice a distinct difference in how much of your sole rests on the metal or pad. The COMNOVA’s 6-inch width gives you more room to position your foot comfortably. The TAC’s 3-inch round tube provides a classic tubular look but with a narrower contact patch. This difference matters most when you are carrying items or wearing larger boots.
Material Construction
Build materials differ significantly between these two options. The COMNOVA running boards are constructed from stainless steel, which is known for its resistance to corrosion and rust. This material choice supports a durable finish that withstands weather exposure. The TAC side steps are made from heavy-duty mild steel. To protect this mild steel, TAC applies an E-coating followed by an A+ grade heavy texture black powder coat. This finish is designed to be rust-resistant and anti-scratch. While stainless steel is inherently corrosion-resistant, the powder-coated mild steel offers a thick protective layer. You should consider the maintenance requirements and the specific environmental conditions of your truck. Both materials aim for longevity, but the COMNOVA uses a single material type, while the TAC relies on a coated substrate.
Weight Capacity
Load-bearing capability is a critical spec for running boards. The COMNOVA product explicitly states that each bar can support up to 500 lbs. This high weight capacity ensures that you can step on the board confidently, even if you are heavy or carrying gear. The TAC product data does not list a specific weight capacity for its side steps. It mentions strong support and includes mounting hardware, but the exact limit is not provided in the specs. For buyers who prioritize a verified load limit, the COMNOVA provides a clear 500 lb rating. The TAC relies on the reputation of its heavy-duty mild steel construction, but without a stated number, you cannot compare the two directly on this metric. The COMNOVA wins on verified data.
Installation Method
Both products utilize a bolt-on installation method that requires no drilling. The COMNOVA running boards are described as direct bolt-on, making the process straightforward. You simply mount the brackets and attach the bars. The TAC side steps also offer easy bolt-on installation and include all necessary mounting hardware and instructions. Both products are designed for crew cab trucks, ensuring a tailored fit. The COMNOVA features four brackets on each side with plastic covers to enhance appearance and prevent rust. The TAC uses heavy-duty mild steel brackets. Since both require no drilling and include hardware, the installation effort is comparable. You will spend similar time on both projects. This aspect is a tie for both products.
Design Profile
The visual and physical profile of the steps varies. The COMNOVA features a flat, 6-inch wide step made of stainless steel and anti-slip plastic. It has an innovative slider design that allows you to adjust the position forward and backward for better customization. This adjustability is a unique feature not found in the TAC. The TAC side steps have a round tube shape with a 3-inch diameter. This tubular design is more traditional and sits lower to the ground. The COMNOVA’s flat surface and adjustable brackets offer more flexibility in fitment. The TAC’s round tube offers a sleek, OE-style look. You must decide if you prefer the adjustability and flat surface of the COMNOVA or the classic round profile of the TAC.
Choose your step width
Silverado owners wanting wide footing
The COMNOVA model features a 6-inch stainless steel step. This wide surface offers secure footing for crew cab trucks. It supports up to 500 lbs. The direct bolt-on installation requires no drilling. This spec ensures stability and ease of use for frequent entry.
Ram drivers preferring low profile
The TAC side step uses a 3-inch round tube design. It fits RAM crew cabs with a compact profile. The heavy-duty mild steel construction includes a black powder-coated finish. This spec provides rust resistance and a sleek look without excessive width on the truck side.
Users needing high weight capacity
You should choose the COMNOVA board if you need maximum load support. It is rated for 500 lbs per bar. The stainless steel material and anti-slip plastic steps enhance durability. This spec makes it suitable for heavier users or those carrying gear while stepping into the cab.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | COMNOVA 6" Stainless Steel Running Board | non-diesel Crew Cab trucks needing wide steps | Check price of COMNOVA 6" Stainless Steel Running Board on Amazon |
| 2 | TAC 3-Inch Round Side Steps for Ram Crew Cab | RAM Crew Cab trucks needing 3-inch steps | Check price of TAC 3-Inch Round Side Steps for Ram Crew Cab on Amazon |
The products compared
COMNOVA 6" Stainless Steel Running Board
Best for: non-diesel Crew Cab trucks needing wide steps
- Width
- 6-Inch (what this guide is about)
- Cab Size
- Crew Cab
- Material
- Stainless Steel
- Step Width
- 6 inches
- Installation
- Direct bolt-on, no drilling
- Finish
- Stainless Steel
View on Amazon: COMNOVA 6" Stainless Steel Running Board Affiliate link
This Comnova running board features a 6-inch wide step made from stainless steel. It is designed for 2007-2018 Chevy Silverado and GMC Sierra 1500 Crew Cab trucks. The unit supports up to 500 lbs and installs via direct bolt-on without drilling. The slider design allows forward and backward adjustment for better customization. It includes plastic bracket covers to prevent rust.
Pros
- 6-inch wide step for secure footing
- Stainless steel construction with anti-slip plastic steps
- Direct bolt-on installation without drilling
- 500 lb weight capacity per bar
- Slider design for adjustable positioning
Cons
- Not suitable for diesel engine models
- Excludes 2007 Silverado 1500 Classic
- No remote or app control listed
Good fit if
- You need a wide 6-inch step for easier access
- You drive a non-diesel Crew Cab Silverado or Sierra
- You prefer adjustable mounting for precise fitment
Skip if
- You own a diesel engine model
- You have a 2007 Silverado 1500 Classic
- You prefer a narrower 3-inch step profile
Verdict: Comnova 6-Inch Stainless Steel Running Board offers a wide, sturdy step for Crew Cab owners who need easy access. It fits non-diesel 2007-2018 models well but excludes diesel variants.
TAC 3-Inch Round Side Steps for Ram Crew Cab
Best for: RAM Crew Cab trucks needing 3-inch steps
- Width
- 3-Inch (what this guide is about)
- Cab Size
- Crew Cab
- Material
- Heavy duty mild steel
- Step Width
- 3 inches
- Tube Shape
- Round
- Installation
- Bolt-on
View on Amazon: TAC 3-Inch Round Side Steps for Ram Crew Cab Affiliate link
This TAC side step features a 3-inch round tube made from heavy-duty mild steel. It includes a heavy texture black powder coated finish for rust resistance. The design incorporates wide, UV-resistant non-slip step pads for better traction. It is built for RAM 1500 Crew Cab and Classic models, as well as 2500/3500/4500/5500 trucks. Installation is a straightforward bolt-on process with included hardware.
Pros
- 3-inch round tube provides a standard step width
- Heavy-duty mild steel construction with E-coating
- UV-resistant non-slip wide step pads included
- Bolt-on installation with all hardware included
Cons
- Limited to Crew Cab configurations
- Specific to RAM truck models only
- No alternative step height options listed
Good fit if
- You drive a RAM 1500 Crew Cab or Classic
- You prefer a 3-inch step width for easier access
- You want a durable steel construction with a textured finish
Skip if
- You drive a Dodge Ram Double Cab or Quad Cab
- You need steps for a truck brand other than RAM
- You prefer a wider step surface for easier footing
Verdict: TAC 3-Inch Round Tube Side Steps suits RAM owners who need a durable, bolt-on step for Crew Cab models. The 3-inch width and textured finish offer reliable access without requiring complex installation.
Specifications side by side
| Spec | COMNOVA 6" Stainless Steel Running Board | TAC 3-Inch Round Side Steps for Ram Crew Cab |
|---|---|---|
| Cab Size | Crew Cab | Crew Cab |
| Material | Stainless Steel | Heavy duty mild steel |
| Step Width | 6 inches | 3 inches |
| Tube Shape | not stated | Round |
| Installation | Direct bolt-on, no drilling | Bolt-on |
| Finish | Stainless Steel | Heavy Texture black powder coated |
| Weight Capacity | 500 lb | not stated |
| Compatible Truck | Chevy Silverado, GMC Sierra | Dodge Ram 1500, Ram |
| Width | 6-Inch | 3-Inch |
| Style | not stated | Side Steps |
| Dimensions | 86 × 6 × 2 inches | not stated |
| Weight | 49.6 pounds | not stated |
| Size | 07-18 Silverado Crew Cab | 3 inch Tube |
| Color | Stainless Steel | Heavy Texture |
| Model | 15655H6-8-C | STST3S-D108T |
Frequently asked questions
Which running board is better for tall trucks?
A 6-inch step provides a lower profile relative to the ground, reducing the climb height. The COMNOVA 6-inch model measures 2 inches in height, creating a wider platform that sits closer to the truck bed. This design offers a more gradual ascent for Crew Cab owners compared to narrower options.
Do 3-inch side steps fit all crew cabs?
Fitment depends on the specific truck model and year. The TAC 3-inch side steps are designed specifically for Dodge Ram 1500 Crew Cab models. You must verify compatibility with your vehicle's make and cab size before purchasing to ensure the bolt-on hardware aligns correctly with your truck's frame.
Is stainless steel better than black textured finish?
Stainless steel offers durability and a polished look, while textured finishes provide grip. The COMNOVA board uses stainless steel for a sturdy, wide step surface. The TAC side step features a heavy texture black finish, which can offer better traction for your footwear in wet or muddy conditions.
How much weight can a 6-inch step hold?
The COMNOVA 6-inch stainless steel running board supports up to 500 lbs. This capacity ensures stability for larger users or those carrying gear while boarding. The 49.6-pound weight of the unit itself indicates a robust construction designed to handle significant load without flexing during use.
Are these steps easy to install without drilling?
Both options use a direct bolt-on installation method that requires no drilling. The COMNOVA and TAC models are engineered to attach securely to your truck's existing frame points. This approach preserves your vehicle's integrity and simplifies the mounting process for most DIY enthusiasts.
Which is better for off-road clearance?
A 3-inch tube step generally offers better ground clearance than a flat 6-inch board. The TAC round tube design protrudes less from the vehicle body, reducing the risk of snagging on obstacles. This profile is advantageous for trucks used on uneven terrain or steep driveways.
Can I use these on a diesel truck?
You must check specific compatibility notes. The COMNOVA 6-inch board excludes diesel variants for 2007-2018 Silverado models. Always verify if your truck is a diesel before ordering, as frame differences may prevent proper fitment. The TAC model is listed for Ram trucks, but you should confirm your specific engine type matches the product requirements.