When shopping for a roll bar, all the different models and options can get confusing.  Customers often call us to help them decide which bar to get. See our Roll Bar FAQ for more information. 

Here is a brief description of every roll bar we offer to help you decide which bar is right for you. If you still have questions, call us at 214-340-9797 and we will be glad to assist you. 

NOTE: When placing an order: This item has flat rate shipping. All Hard Dog products must be ordered individually for our website to correctly calculate shipping.   

WARNING: This article is sold without warranty, expressed or implied. No warranty is made to this product's ability to protect the user from any injury or death. The user assumes that risk.

Hard Dog Hard Core Bar

This roll bar has a beefy appearance since it is made out of proprietary 1026 alloy drawn over mandrel tubing 1.75” OD X .120” wall.  This roll bar were originally designed to meet the requirements for participation in the now defunct SCCA Solo 1 class. Some venues continue to utilize these specifications. Check the rules for the particular event in which you plan to participate as the event organizers have the final word on safety requirements. 

The rear braces are straight and a single diagonal in the main hoop is standard while double diagonals are an option.  Options also include high-density foam padding and leather or vinyl covers.  Only available in black powder coat.

The Hard Core Has Four Variations

M1 Hard Core

The Standard M1 Hard Core is the tallest design possible with a functional soft top but not necessarily the best choice for tall drivers using stock seats because of the more forward placement of the main hoop. We recommend the Hard Core Hardtop version or Sport models for most drivers over 5' 9" with unmodified stock seats. 

M2 Hard Core

The M2 Hard Core models fit all Miata chassis from 1990 - 2005. Specifically designed for the second generation Mazda glass rear window convertible tops or equivalent size aftermarket glass window installed on a first generation Miata. The M2 Hard Core are also compatible will all flexible plastic rear window tops.(See FAQ)

The Standard M2 Hard Core is not designed for use with a hardtop. The M2 Hard Core Hardtop is built for use with the Mazda hardtop and glass rear window soft top.

The Standard M2 Hard Core is the tallest design possible with a functional top but not necessarily the best choice for tall drivers using stock seats because of the more forward placement of the main hoop. We recommend the Hard Core Hardtop version or Sport models for most drivers over 5' 9" with unmodified stock seats. 

M1 Hard Core Hardtop

The M1 Hard Core Hardtop models fit all Miata chassis from 1990 - 2005 and are specifically designed for plastic rear window convertible tops. Not compatible with glass rear window soft tops. This 4-point roll bar includes a harness bar as standard. The M1 Hard Core Hardtop comes standard with a single diagonal but is available with double diagonals or X Brace diagonals. 

Similar to the standard M1 Hard Core but the main hoop of the bar is lower and set farther back to clear the OEM hardtop. Preferable for taller drivers using stock seats because of the more rearward placement of the main hoop. It also has two additional mounting points, making it a true 6-point roll bar. It will not work with soft-top glass rear windows. Diagonal options remain the same as the standard M1 Hard Core.

M2 Hard Core Hardtop

The M2 Hard Core Hardtop models fit all Miata chassis from 1990 - 2005. Specifically designed for the second generation Mazda glass rear window convertible tops or equivalent size aftermarket glass window installed on a first generation Miata. The M2 Hard Core Hardtop are also compatible will all flexible plastic rear window tops.(See FAQ)

Similar to the standard M2 Hard Core but the main hoop of the bar is lower and set farther back to clear the OEM hardtop.  Preferable for taller drivers using stock seats because of the more rearward placement of the main hoop. It also has two additional mounting points, making it a true 6-point roll bar. The bar allows for the most options as it works with plastic or glass rear windows and hardtops. Diagonal options remain the same as the standard M2 Hard Core.  

Hard Dog Sport
(1990-2005)

The Sport is the most popular model and was designed for safety and low impact on vehicle utility.  This 6-point bar uses 1.5” tubing and is available in black powder coat only. This bar meets SCCA Time Trial and NASA HPDE safety requirements when equipped with diagonal bracing. (See FAQ)   Perfect for someone looking for additional protection on a daily driver and meets typical autocross and track event standards. The Sport fits 1990 - 2005 Miata chassis and is Mazda Hardtop compatible with stock latches. Options include high-density foam padding and leather or vinyl covers.

The Sport Has Two Main Variations

M1 Sport

The M1 Sport fits 1990 - 2005 Miata chassis when fitted with a plastic rear window convertible top. Not compatible with glass rear window soft tops. This bar will fit with the OEM hardtop. The M1 Sport comes standard with no diagonals but can be ordered with single, double or X brace diagonals. The rear braces are straight. A harness bar is optional.   It is available in black powder coat only.

M2 Sport

Designed for second generation Miatas (99-05). They can also be installed in the earlier cars.  It allows for the use of a plastic or glass rear window and works with OEM and many aftermarket glass window tops. (See FAQ) Will also work with OEM hardtop. To allow for the glass window, the rear braces have a slight bend.  Optional harness tabs are available.  It is available in black powder coat only.

Hard Dog Sport
(2006-2015)

M3 Sport

Designed for the third generation MX-5 (06-15).  Built from heavy wall tubing these bars are a serious upgrades from the stock NC equipment.  This roll bar replaces the factory hoops and provides an additional 3¼” of height over the factory roll bar. Works with factory soft-top. A slightly shorter removable hard top version is optional.

This bar does not work on a MX-5 with the power retractable hardtop (PRHT).  It comes standard with no diagonals.  Double diagonals are an option. Other options include a harness bar, rear speaker bracket and a removable Petty bar (front brace) are options.  It is available in black powder coat only.  

Hard Dog Sport
(2016+)

M4 Sport

Designed for the fourth generation MX-5 and Fiat 124 Spider (2016+).   Not compatible with the 2017+ Miata RF.  Built from heavy wall 1.75" diameter tubing these bars are a serious upgrades from the stock ND equipment. The aluminum factory cross brace and hoops are removed and replaced. A harness bar with an integral top latch bracket is included as standard equipment. The stock seat belts are retained without alteration.   It comes standard with no diagonals.  Double diagonals is the only option.  It is available in black powder coat only.

Additional Roll Bar Styles

Ace

A traditional roll bar designed with more rearward placement for better head clearance that doesn't interfere with the stock seat belts. The flexibility of this design allows us to offer this bar in many configurations to include: one or two diagonals, harness bar and side or top main hoop rear bracing. 

The diagonals and / or harness bar can be located in the main hoop or between the rearward braces, or if you prefer, no diagonal or harness bar at all. Fits all Miatas from 1990 - 2005, compatible with Mazda hardtop, plastic rear window soft tops and aftermarket or OEM glass rear window convertible tops.* 

Deuce

The deuce mounts in the same way as the Ace. It is a true double hoop roll bar and has a classic look to it.  It is available in black powder coated mild steel only.  It is compatible with first and second generation Miatas (90-05) and works with most plastic and glass rear windows and OEM hardtops. It is not compatible with factory wind blockers. The Deuce can be ordered in two different configurations.  Center braced rear supports give a classic Shelby Cobra look.  Side braced gives a cleaner double hoop appearance. Harness tabs are optional.

Xtreme

This bar is pretty twisted.  It has a very unique look.  Installation is similar to the Hard Dog Sport.  It uses 1.75” tubing and is available in black powder coated mild steel only.  The Xtreme is compatible with all first and second generation Miatas (90-05) and does not interfere with most plastic and glass rear windows and OEM hardtops. It is not compatible with factory wind blockers.          

Hard Bar

The Hard Bar is the easiest bar to install.  A 4-point bar made of 1.5” tubing, it is similar to the Hard Dog Sport without the rear braces. While this bar can add roll over protection it may not meet safety regulations at track events which typically require reaward bracing.  It is available in black powder coated mild steel only. It is compatible with all first and second generation Miatas (90-05) and does not interfere with plastic or glass rear windows and factory hardtops.  Options include high-density foam padding and leather or vinyl covers.

M3 Hard Bar for PRHT

Designed for the third generation MX-5 (07-15) with power retractable hardtop. (PRHT)  This bar actually uses the 1.75” tubing of the hardcore bars.  It is available in black powder coated mild steel only.  This roll bar replaces the factory hoops and works with the PRHT.  It comes standard with no diagonals.  A single diagonal is not an option.  Double diagonals and a harness bar are options. Options also include rear speaker bracket, high-density foam padding and leather or vinyl covers. 

Roll Bar Accessories

Door Bars

The Bolt-In Door Bars are designed specifically to stiffen the chassis of your Miata. A torsionally stiff chassis will keep a more even load on all wheels to improve traction. The stiffer a chassis, the more likely the vehicle is to have even weight distribution on all tires which is favorable to cornering and superior handling. The Bolt-In Door Bars are easily installed in all '90-2005 model Miatas in conjunction with any version Hard Dog Roll Bar or even if no roll bar has been installed with minimal interference to normal use of the car. Additional rear back up plates are required if the door bars are to be used without a roll bar or with the Ace, Deuce or Hard Bar models.

Bolt-in Harness Bar

The Bolt-In Harness Bar is designed for competition harness wrap-around shoulder strap attachment. Easily installed in all year model Miatas in conjunction with any version of The Hard Bar, Sport Bar or Hard Core Bar with the least amount of interference for normal use of the car. Requires no drilling or panel alteration. Serves as a retrofit in situations where harness attachments were not ordered with a roll bar, or if you have an M2 bar with harness tabs and track event rules require individual shoulder strap attachments.                                                                                 

Roll Bar Padding

Hard Dog Roll Bar Padding is SFI rated and custom formed to fit most of their roll bars.  You can dress up the bar and protect the padding from the sun with a custom stitched cover available in black vinyl or leather.  The covers and padding are available when ordering a roll bar or separately if you already have a Hard Dog roll bar.