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 is our best seller.  It has a beefy appearance since it is made out of 1.75” mild steel tubing.  This roll bar meets SCCA Solo I requirements.  Perfect for the autocross or track day weekend racer. 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 coated mild steel

The Hard Core Has Four Variations

M1 Hard Core

M2 Hard Core

Designed for second generation Miatas (99-05). Fits any 1990-2005 Miata with a plastic or glass rear window soft top.* This 4-point roll bar 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 not fit with OEM hardtop. To allow for the glass window, the rear braces have been shortened and harness tabs replace the harness bar of the M1.

* See FAQ for details

M1 Hard Core Hardtop

Similar to the standard M1 but the main hoop of the bar is lower and set farther back to clear the OEM hardtop. 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

Similar to the standard M2 but the main hoop of the bar is lower and set farther back to clear the OEM hardtop.  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

This is also a popular option.  This 6-point bar uses 1.5” tubing and is available in black powder coated mild steel or polished stainless steel. It comes standard without diagonals. Single or double diagonals are an option. This bar is not approved for SCCA Solo I (See FAQ)   Perfect for someone looking for additional protection on a daily driver and meets typical autocross and track event standards. It does allow use of the OEM hardtop. Options include high-density foam padding, leather or vinyl covers and finish, black powder coated mild steel or T-304 polished stainless steel.

The Sport Has Four Main Variations

M1 Sport

Designed for first generation Miatas (90-97). This bar will not work with a glass rear window but will fit with the OEM hardtop. The M1 comes standard with no diagonals but can be ordered with single or double diagonals. The rear braces are straight. A harness bar is optional.   It is available in black powder coated mild steel or T-304 polished stainless steel.

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 coated mild steel or T-304 polished stainless steel.

M3 Sport

Designed for the third generation MX-5 (06-15).  This bar actually uses the 1.75” tubing of the hardcore bars.  This roll bar replaces the factory hoops and provides an additional 3¼” of height over the factory roll bar. Works with factory soft-top and removable hardtop but does not work on a MX-5 with the power retractable hardtop (PRHT).  It comes standard with no diagonals.  A single diagonal is not an option.  Double diagonals, a harness bar, rear speaker bracket and a removable Petty bar (front brace) are options.  It is available in black powder coated mild steel or T-304 polished stainless steel.  

M4 Sport

Designed for the fourth generation MX-5 (2016+).  Works with factory soft-top and the stock seat belts are retained without alteration.  This bar actually uses the 1.75” tubing of the hardcore bars.  This roll bar replaces the factory hoops and a harness bar with an integral top latch bracket is included as standard equipment.   It comes standard with no diagonals.  Double diagonals is the only option.  It is available in black powder coated mild steel or T-304 polished stainless steel

Additional Roll Bar Styles

Ace

This is an 8-point roll bar with plenty of options.  It sits the farther back for maximum head clearance.  It does not interfere with the retracting of the seat belt reels. The Ace uses 1.75” mild steel tubing and is powder coated black.  It is compatible with most plastic and glass rear windows and OEM hardtops. It is not compatible with factory wind blockers.The Ace is available with no diagonals, single and double diagonals. Other options include harness bar, top mounted rear braces, and diagonals that mount to the rear braces.  This last option is not compatible with glass rear windows. Options also include high-density foam padding and leather or vinyl covers.

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 or T-304 polished stainless steel.  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 or T-304 polished stainless steel.  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 or T-304 polished stainless steel. 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 or polished T-304 stainless steel.  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. * Not available for the Xtreme Roll Bar.