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Product Information
The Mares Stainless Steel Backplate is a 316 stainless steel XR system backplate built for technical divers who rig Hogarthian-style harnesses with donut or horseshoe wings. Available in 3 mm and 6 mm thickness options.
Who it is for
This backplate suits divers who want a modular mounting plate built around a Hogarthian harness with donut or horseshoe wings. Its 8 loops are positioned for optimal harness placement, with 2 upper and 2 lower loops that connect the straps directly to the tank, so it works across a wide range of harness setups and wing styles without weakening the structure of the plate.
Key details
- Constructed from 316 stainless steel, laser cut and engraved with 13 slots and the Mares XR logo
- Curved lower edges on the shaped stainless steel plate.
- Wide 5 cm (2 in) slot for the crotch strap
- 15 total holes: 3 at the top for height adjustment, a matching slot at the lower center for misaligned bolts, and 4 holes along each side plus 4 along the bottom for mounting accessories
- Available in 3 mm and 6 mm thickness options.
Compatibility and sizing
The backplate is offered in two thickness options: 3 mm (SKU 4175073MM) and 6 mm (SKU 4175076MM). Its modular design and 8 positioning loops allow it to pair with all harness styles and rear donut or horseshoe wings.
DiveCatalog.com is an authorized Mares dealer and a dive shop in Irvine, California, open since 2003. Call or chat with us at 888-701-4017 if you have questions about thickness choice, harness compatibility or fit.
- 316 stainless steel construction laser cut and engraved with 13 slots.
- Curved lower edges on the shaped stainless steel plate.
- Mares XR logo laser cut into the shaping of the plate.
- Highly technical pre-shaping for versatile rig configuration.
- Total modularity works with all harness styles and rear donut or horseshoe wings.
- 8 loops specifically positioned for optimal harness placement.
- 2 upper and 2 lower loops connect the straps directly to the tank.
- Lateral stability from the 2 loop design without weakening the structure of the backplate.
- Wide 5 cm (2 in) crotch strap slot for the crotch strap.
- 15 total holes including 3 top holes for height adjustment, a matching lower center slot for misaligned bolts, and 4 holes along each side plus 4 along the bottom for mounting accessories.
| Brand | Mares |
| Product type | BCD Accessory, Backplate |
| Material | 316 stainless steel |
| Thickness options | 3 mm, 6 mm |
| Slots | 13 laser cut |
| Crotch strap slot width | 5 cm / 2 in |
| Mounting holes | 15 |
| Harness loops | 8 |
| SKU, 3 mm | 4175073MM |
| SKU, 6 mm | 4175076MM |
| MPN | 4175073MM |
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
What is the difference between the 3 mm and 6 mm Mares Stainless Steel Backplate?
The two versions differ in thickness: the thinner 3 mm plate gives a lighter setup, while the 6 mm plate adds weight to your rig.
Will the Mares Stainless Steel Backplate work with my existing harness?
Yes. Its total modularity is designed to work with all harness styles and with rear donut or horseshoe wings. The 8 loops, including 2 upper and 2 lower loops that connect straps directly to the tank, are positioned for optimal harness placement across different rig configurations.
How many mounting holes does the backplate have?
It has 15 total holes: 3 at the top of the plate for height adjustment of bags and cylinders, a matching slot at the lower center for misaligned bolts, and 4 holes along each side perimeter plus 4 along the bottom for mounting accessories.
How wide is the crotch strap slot on this backplate?
The backplate has a wide 5 cm (2 in) slot for the crotch strap.












